taxonID	type	format	identifier	references	title	description	created	creator	contributor	publisher	audience	source	license	rightsHolder	datasetID
03FB4C21FF9257433B6FFD7363A5F88E.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/20313033/files/figure.png	https://doi.org/10.5281/zenodo.20313033	Fig. 2. A–B. Discradisca antillarum (d’Orbigny, 1845), MNHN-IB-2017-221. A. External dorsal valve. B. Interior of the same valve. — C–K. Novocrania anomala (Müller, 1776). C–D. External dorsal valves of MNHN-IB-2022-964 and MNHN-IB-2022-965. E. Dorsal valve interior from the same valve as D. F. Dorsal valve interior, revealing the anterior adductors (a.a.) and posterior adductors (p.a.), MNHN- IB-2022-966. G–K. SEM views of MNHN-IB-2022-966. G. Interior of the same preceding dorsal valve, revealing the anterior adductors, dorsal mantle canals (mc), posterior adductors, oblique internal scar and septum (S). H. Close-up view of the posterior adductor myotest. I. Close-up view of the anterior adductor area. J. Close-up view of the anterior part of the anterior adductors and the septum. K. Spiral growing tablets of the semi-nacreous layer at the valve floor (arrowheads). Scale bars: A–F =1 mm; G = 1.5 mm; H =20 µm; I= 100 µm; J = 500 µm; K =10 µm.	Fig. 2. A–B. Discradisca antillarum (d’Orbigny, 1845), MNHN-IB-2017-221. A. External dorsal valve. B. Interior of the same valve. — C–K. Novocrania anomala (Müller, 1776). C–D. External dorsal valves of MNHN-IB-2022-964 and MNHN-IB-2022-965. E. Dorsal valve interior from the same valve as D. F. Dorsal valve interior, revealing the anterior adductors (a.a.) and posterior adductors (p.a.), MNHN- IB-2022-966. G–K. SEM views of MNHN-IB-2022-966. G. Interior of the same preceding dorsal valve, revealing the anterior adductors, dorsal mantle canals (mc), posterior adductors, oblique internal scar and septum (S). H. Close-up view of the posterior adductor myotest. I. Close-up view of the anterior adductor area. J. Close-up view of the anterior part of the anterior adductors and the septum. K. Spiral growing tablets of the semi-nacreous layer at the valve floor (arrowheads). Scale bars: A–F =1 mm; G = 1.5 mm; H =20 µm; I= 100 µm; J = 500 µm; K =10 µm.	2026-05-19	Gaspard, Danièle		Zenodo	biologists	Gaspard, Danièle			
03FB4C21FF9457463B0FFE7E6383FD88.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/20313033/files/figure.png	https://doi.org/10.5281/zenodo.20313033	Fig. 2. A–B. Discradisca antillarum (d’Orbigny, 1845), MNHN-IB-2017-221. A. External dorsal valve. B. Interior of the same valve. — C–K. Novocrania anomala (Müller, 1776). C–D. External dorsal valves of MNHN-IB-2022-964 and MNHN-IB-2022-965. E. Dorsal valve interior from the same valve as D. F. Dorsal valve interior, revealing the anterior adductors (a.a.) and posterior adductors (p.a.), MNHN- IB-2022-966. G–K. SEM views of MNHN-IB-2022-966. G. Interior of the same preceding dorsal valve, revealing the anterior adductors, dorsal mantle canals (mc), posterior adductors, oblique internal scar and septum (S). H. Close-up view of the posterior adductor myotest. I. Close-up view of the anterior adductor area. J. Close-up view of the anterior part of the anterior adductors and the septum. K. Spiral growing tablets of the semi-nacreous layer at the valve floor (arrowheads). Scale bars: A–F =1 mm; G = 1.5 mm; H =20 µm; I= 100 µm; J = 500 µm; K =10 µm.	Fig. 2. A–B. Discradisca antillarum (d’Orbigny, 1845), MNHN-IB-2017-221. A. External dorsal valve. B. Interior of the same valve. — C–K. Novocrania anomala (Müller, 1776). C–D. External dorsal valves of MNHN-IB-2022-964 and MNHN-IB-2022-965. E. Dorsal valve interior from the same valve as D. F. Dorsal valve interior, revealing the anterior adductors (a.a.) and posterior adductors (p.a.), MNHN- IB-2022-966. G–K. SEM views of MNHN-IB-2022-966. G. Interior of the same preceding dorsal valve, revealing the anterior adductors, dorsal mantle canals (mc), posterior adductors, oblique internal scar and septum (S). H. Close-up view of the posterior adductor myotest. I. Close-up view of the anterior adductor area. J. Close-up view of the anterior part of the anterior adductors and the septum. K. Spiral growing tablets of the semi-nacreous layer at the valve floor (arrowheads). Scale bars: A–F =1 mm; G = 1.5 mm; H =20 µm; I= 100 µm; J = 500 µm; K =10 µm.	2026-05-19	Gaspard, Danièle		Zenodo	biologists	Gaspard, Danièle			
03FB4C21FF9757473B78FDF462F3FE55.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/20313038/files/figure.png	https://doi.org/10.5281/zenodo.20313038	Fig. 3. Novocrania turbinata (Poli, 1795). A. External dorsal valve, with coloured patterns and marked growth lines, MNHN-IB-2022-967. B. External ventral valve, revealing a worn area (surface of cementation), MNHN-IB-2022-968. C. Interior of the same valve. The anterior (a.a.) and posterior (p.a.) adductors, mantle canals (m.ca) and rostellum (ro) are identified. Scale bars = 2 mm.	Fig. 3. Novocrania turbinata (Poli, 1795). A. External dorsal valve, with coloured patterns and marked growth lines, MNHN-IB-2022-967. B. External ventral valve, revealing a worn area (surface of cementation), MNHN-IB-2022-968. C. Interior of the same valve. The anterior (a.a.) and posterior (p.a.) adductors, mantle canals (m.ca) and rostellum (ro) are identified. Scale bars = 2 mm.	2026-05-19	Gaspard, Danièle		Zenodo	biologists	Gaspard, Danièle			
03FB4C21FF99574B3B6BFE7B62F1FAE5.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/20313040/files/figure.png	https://doi.org/10.5281/zenodo.20313040	Fig. 4. Cryptopora rectimarginata Cooper, 1959. A. Dorsal view of an adult specimen, MNHN- IB-2022-970. B. Smaller specimen, MNHN-IB-2022-971. C. Specimen with a slender pedicle, MNHN-IB-2022-972. D. Specimen beginning to develop deltidial plates, MNHN-IB-2022-973. E. Specimen from the same station as specimen C, with more developed winged deltidial plates, MNHN-IB2022-974. F. Ventral valve widely bored by a gastropod, revealing the teeth, MNHN-IB-2022-975. G. Posterior part of ventral valve of an obviously juvenile specimen, revealing the pedicle collar, deltidial plates (d.pl.) and teeth (t), MNHN-IB-2022-1082. H. Closeup view of a tooth showing a well-arranged mosaic of fibre ends, MNHN-IB-2022-1082. I. Juvenile specimen attached in living position to an organic substrate, MNHN-IB-2022-976. Scale bars: A, I =1 mm; B=500 µm; C–F =1 mm; G =200 µm; H= 100 µm.	Fig. 4. Cryptopora rectimarginata Cooper, 1959. A. Dorsal view of an adult specimen, MNHN- IB-2022-970. B. Smaller specimen, MNHN-IB-2022-971. C. Specimen with a slender pedicle, MNHN-IB-2022-972. D. Specimen beginning to develop deltidial plates, MNHN-IB-2022-973. E. Specimen from the same station as specimen C, with more developed winged deltidial plates, MNHN-IB2022-974. F. Ventral valve widely bored by a gastropod, revealing the teeth, MNHN-IB-2022-975. G. Posterior part of ventral valve of an obviously juvenile specimen, revealing the pedicle collar, deltidial plates (d.pl.) and teeth (t), MNHN-IB-2022-1082. H. Closeup view of a tooth showing a well-arranged mosaic of fibre ends, MNHN-IB-2022-1082. I. Juvenile specimen attached in living position to an organic substrate, MNHN-IB-2022-976. Scale bars: A, I =1 mm; B=500 µm; C–F =1 mm; G =200 µm; H= 100 µm.	2026-05-19	Gaspard, Danièle		Zenodo	biologists	Gaspard, Danièle			
03FB4C21FF99574B3B6BFE7B62F1FAE5.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/20313042/files/figure.png	https://doi.org/10.5281/zenodo.20313042	Fig. 5. Cryptopora rectimarginata Cooper, 1959. A–E. Dorsal valve interior revealing the cardinal process, crura and median septum, MNHN-IB-2022-977. B–H. SEM views. B. Half dorsal valve, showing the cardinal process, the crural plates ending in hand-like crura. C. Close-up view of the handlike crura. D. Upper part of the septum with its microstructure. E. Lateral view of the high median septum, with its partly fibrous mosaic. F. Interior of a dorsal valve partly tilted laterally to reveal: the high inner socket ridges (i.s.r), the crural plates, high septum separating the adductors (ad) and the fibrous mosaic at the valve floor, MNHN-IB-2022-778. G. Close-up view of the septum illustrating the change of fibre orientations ending by a brachiotest at its lateral posterior part, MNHN-IB-2022-778. H. Fibrous mosaic from the inner valve margin to the middle valve, MNHN-IB-2022-778. Scale bars: A, F =1 mm; B, E =200 µm; C, H =50 µm; D =100 µm; G =400 µm.	Fig. 5. Cryptopora rectimarginata Cooper, 1959. A–E. Dorsal valve interior revealing the cardinal process, crura and median septum, MNHN-IB-2022-977. B–H. SEM views. B. Half dorsal valve, showing the cardinal process, the crural plates ending in hand-like crura. C. Close-up view of the handlike crura. D. Upper part of the septum with its microstructure. E. Lateral view of the high median septum, with its partly fibrous mosaic. F. Interior of a dorsal valve partly tilted laterally to reveal: the high inner socket ridges (i.s.r), the crural plates, high septum separating the adductors (ad) and the fibrous mosaic at the valve floor, MNHN-IB-2022-778. G. Close-up view of the septum illustrating the change of fibre orientations ending by a brachiotest at its lateral posterior part, MNHN-IB-2022-778. H. Fibrous mosaic from the inner valve margin to the middle valve, MNHN-IB-2022-778. Scale bars: A, F =1 mm; B, E =200 µm; C, H =50 µm; D =100 µm; G =400 µm.	2026-05-19	Gaspard, Danièle		Zenodo	biologists	Gaspard, Danièle			
03FB4C21FF9A574D3B29F9D4640AF9FD.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/20313046/files/figure.png	https://doi.org/10.5281/zenodo.20313046	Fig. 6. Gryphus bartletti (Dall, 1882). A–C. Dorsal, right lateral and anterior views of an adult, MNHN- IB-2022-979. D–F. Dorsal, left lateral and anterior views of a gibbous specimen, MNHN-IB-2022-980. G–I. Three views of a relatively wide specimen, MNHN-IB-2022-981. J. Set of muscle imprints viewed by transparency at the external ventral valve (V.V.). K. Same set of muscle imprints (µ) viewed inside, foramen (fo), deltidial plates (d.pl), pedicle collar (pe.co), MNHN-IB-2022-1081. Scale bars: A–J=5 mm; K =2 mm.	Fig. 6. Gryphus bartletti (Dall, 1882). A–C. Dorsal, right lateral and anterior views of an adult, MNHN- IB-2022-979. D–F. Dorsal, left lateral and anterior views of a gibbous specimen, MNHN-IB-2022-980. G–I. Three views of a relatively wide specimen, MNHN-IB-2022-981. J. Set of muscle imprints viewed by transparency at the external ventral valve (V.V.). K. Same set of muscle imprints (µ) viewed inside, foramen (fo), deltidial plates (d.pl), pedicle collar (pe.co), MNHN-IB-2022-1081. Scale bars: A–J=5 mm; K =2 mm.	2026-05-19	Gaspard, Danièle		Zenodo	biologists	Gaspard, Danièle			
03FB4C21FF9C57513B2CF95E630EFB15.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/20313048/files/figure.png	https://doi.org/10.5281/zenodo.20313048	Fig. 7. Tichosina bullisi Cooper, 1977. A–C. Dorsal, lateral and anterior views of a specimen from Guadeloupe Islet, MNHN-IB-2022-982. D. Dorsal view of a specimen revealed by transparency: adductors and vascula, MNHN-IB-2022-983. E. Dorsal valve interior with the vascula media (white arrowhead) and vascula lateralis (black arrowhead), lophophore (lo), MNHN-IB-2022-983. F. Traces of boring from a brachiopod pedicle attachment: Podichnus centrifugalis Bromley & Surlyk (1973) (white arrowhead), and location of major growth lines (black arrowhead), MNHN-IB-2022-1072. G. Posterior view of a ventral valve interior with the teeth (t), pedicle (pe), adjustors attached to it, adductors (add) and diductors (did), MNHN-IB-2022-984. H. Posterior view of a ventral valve interior with the imprint of a set of adductors and diductors (µ), MNHN-IB-2022-1073. I. Dorsal valve interior (same shell as G), with the brachidium. J. Same valve sightly tilted posteriorly to expose the cardinal process (ca.pr.), dental sockets (d.s.), hinge plates (h.pl.), and reveal the mantle body wall (m.b.w) heavily spiculate and the departure of mantle canals. K. Posterior dorsal valve interior (D.V.) with broken brachidium, revealing the teardrop shape of adductors (add); MNHN-IB-2022-1072. Scale bars: A–D, F, H–I, K=5 mm; E, G, J =2 mm.	Fig. 7. Tichosina bullisi Cooper, 1977. A–C. Dorsal, lateral and anterior views of a specimen from Guadeloupe Islet, MNHN-IB-2022-982. D. Dorsal view of a specimen revealed by transparency: adductors and vascula, MNHN-IB-2022-983. E. Dorsal valve interior with the vascula media (white arrowhead) and vascula lateralis (black arrowhead), lophophore (lo), MNHN-IB-2022-983. F. Traces of boring from a brachiopod pedicle attachment: Podichnus centrifugalis Bromley & Surlyk (1973) (white arrowhead), and location of major growth lines (black arrowhead), MNHN-IB-2022-1072. G. Posterior view of a ventral valve interior with the teeth (t), pedicle (pe), adjustors attached to it, adductors (add) and diductors (did), MNHN-IB-2022-984. H. Posterior view of a ventral valve interior with the imprint of a set of adductors and diductors (µ), MNHN-IB-2022-1073. I. Dorsal valve interior (same shell as G), with the brachidium. J. Same valve sightly tilted posteriorly to expose the cardinal process (ca.pr.), dental sockets (d.s.), hinge plates (h.pl.), and reveal the mantle body wall (m.b.w) heavily spiculate and the departure of mantle canals. K. Posterior dorsal valve interior (D.V.) with broken brachidium, revealing the teardrop shape of adductors (add); MNHN-IB-2022-1072. Scale bars: A–D, F, H–I, K=5 mm; E, G, J =2 mm.	2026-05-19	Gaspard, Danièle		Zenodo	biologists	Gaspard, Danièle			
03FB4C21FF9C57513B2CF95E630EFB15.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/20313050/files/figure.png	https://doi.org/10.5281/zenodo.20313050	Fig. 8. Tichosina bullisi Cooper, 1977. A. Ventral mantle body wall heavily spiculate with orange polygonal net of gonads seen by transparency, MNHN-IB-2022-984. B. Opposite side of the mantle body wall revealing the gonads, MNHN-IB-2022-984. C. Spicules at the basal part of the lophophore arms, MNHN-IB-2022-983. D–H. SEM views along a median longitudinal section through a shell of Tichosina Cooper, 1977; MNHN-IB-2022-985. D. Posterior part of a longitudinal section to show the three-layered shell under the organic periostracum: the very thin acicular primary layer, thin secondary layer (s.l.) and thicker tertiary layer (t.l.) with some alternating s.l. and t.l. A few punctae (P) cross the shell there. E. Close-up view of the primary layer above the fibrous secondary layer. F. Continuity from fibres of the secondary layer to prisms/columns of the tertiary layer (arrowheads). G. Several alternating secondary and tertiary layers near the anterior part of the longitudinal section. H. Close-up view in the secondary layer to reveal the micro-growth rhythms along the fibres (f) and submicrometric granules between two consecutive elementary growth lines. Scale bars: A= 2 mm; B–C= 1 mm; D = 500 µm; E–F =100 µm; G =50 µm; H =10 µm.	Fig. 8. Tichosina bullisi Cooper, 1977. A. Ventral mantle body wall heavily spiculate with orange polygonal net of gonads seen by transparency, MNHN-IB-2022-984. B. Opposite side of the mantle body wall revealing the gonads, MNHN-IB-2022-984. C. Spicules at the basal part of the lophophore arms, MNHN-IB-2022-983. D–H. SEM views along a median longitudinal section through a shell of Tichosina Cooper, 1977; MNHN-IB-2022-985. D. Posterior part of a longitudinal section to show the three-layered shell under the organic periostracum: the very thin acicular primary layer, thin secondary layer (s.l.) and thicker tertiary layer (t.l.) with some alternating s.l. and t.l. A few punctae (P) cross the shell there. E. Close-up view of the primary layer above the fibrous secondary layer. F. Continuity from fibres of the secondary layer to prisms/columns of the tertiary layer (arrowheads). G. Several alternating secondary and tertiary layers near the anterior part of the longitudinal section. H. Close-up view in the secondary layer to reveal the micro-growth rhythms along the fibres (f) and submicrometric granules between two consecutive elementary growth lines. Scale bars: A= 2 mm; B–C= 1 mm; D = 500 µm; E–F =100 µm; G =50 µm; H =10 µm.	2026-05-19	Gaspard, Danièle		Zenodo	biologists	Gaspard, Danièle			
03FB4C21FF8057533B73FB536447FA79.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/20313054/files/figure.png	https://doi.org/10.5281/zenodo.20313054	Fig. 9. Tichosina cubensis (Pourtalès, 1867), MNHN-IB-2022-986. A–D. Dosal, anterior, ventral and lateral views of an adult specimen covered with worm tubes and a crustacean (Thecostraca). E. Ventral valve interior with teeth. F. Dorsal valve interior with the brachidium. G. Wide stellar spicules (sp) of the body wall. H. Posterior part of the dorsal valve interior, slightly tilted to reveal the mantle body wall (m.b.w.) with spicules, and muscles (µ) under the transverse band of the brachidium, the wide anteriorly open dental sockets (d.s.), wide inclined hinge plates (h.pl.), and the short but pointed crural processes. Scale bars: A–F= 5 mm; G =1 mm; H =2 mm.	Fig. 9. Tichosina cubensis (Pourtalès, 1867), MNHN-IB-2022-986. A–D. Dosal, anterior, ventral and lateral views of an adult specimen covered with worm tubes and a crustacean (Thecostraca). E. Ventral valve interior with teeth. F. Dorsal valve interior with the brachidium. G. Wide stellar spicules (sp) of the body wall. H. Posterior part of the dorsal valve interior, slightly tilted to reveal the mantle body wall (m.b.w.) with spicules, and muscles (µ) under the transverse band of the brachidium, the wide anteriorly open dental sockets (d.s.), wide inclined hinge plates (h.pl.), and the short but pointed crural processes. Scale bars: A–F= 5 mm; G =1 mm; H =2 mm.	2026-05-19	Gaspard, Danièle		Zenodo	biologists	Gaspard, Danièle			
03FB4C21FF8257543B17F9B96394F813.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/20313058/files/figure.png	https://doi.org/10.5281/zenodo.20313058	Fig. 10. A–G.?Tichosina madininensis sp. nov. A–C. Dorsal, lateral and anterior views of the holotype, MNHN-IB-2022-987a. D. Posterior dorsal valve interior, with the adjustor muscles (adj) attached to the hinge plates, and the brachidium, MNHN-IB-2022-987b. E–G. Dorsal, anterior and lateral views of a paratype, MNHN-IB-2022-988. — H–L. Tichosina obesa Cooper, 1977. H–J. Elongate specimen, MNHN-IB-2022-989. K–L. MNHN-IB-2022-990. K. Ventral valve interior of a specimen revealing the teeth and the main muscular cast (adductor, ventral adjustor and diductors (µ). L. Posterior dorsal valve interior, with its brachidium. Scale bars: A–C, E–G =5 mm; D, H–L=2 mm.	Fig. 10. A–G.?Tichosina madininensis sp. nov. A–C. Dorsal, lateral and anterior views of the holotype, MNHN-IB-2022-987a. D. Posterior dorsal valve interior, with the adjustor muscles (adj) attached to the hinge plates, and the brachidium, MNHN-IB-2022-987b. E–G. Dorsal, anterior and lateral views of a paratype, MNHN-IB-2022-988. — H–L. Tichosina obesa Cooper, 1977. H–J. Elongate specimen, MNHN-IB-2022-989. K–L. MNHN-IB-2022-990. K. Ventral valve interior of a specimen revealing the teeth and the main muscular cast (adductor, ventral adjustor and diductors (µ). L. Posterior dorsal valve interior, with its brachidium. Scale bars: A–C, E–G =5 mm; D, H–L=2 mm.	2026-05-19	Gaspard, Danièle		Zenodo	biologists	Gaspard, Danièle			
03FB4C21FF8757563B2BFEA163A5F912.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/20313058/files/figure.png	https://doi.org/10.5281/zenodo.20313058	Fig. 10. A–G.?Tichosina madininensis sp. nov. A–C. Dorsal, lateral and anterior views of the holotype, MNHN-IB-2022-987a. D. Posterior dorsal valve interior, with the adjustor muscles (adj) attached to the hinge plates, and the brachidium, MNHN-IB-2022-987b. E–G. Dorsal, anterior and lateral views of a paratype, MNHN-IB-2022-988. — H–L. Tichosina obesa Cooper, 1977. H–J. Elongate specimen, MNHN-IB-2022-989. K–L. MNHN-IB-2022-990. K. Ventral valve interior of a specimen revealing the teeth and the main muscular cast (adductor, ventral adjustor and diductors (µ). L. Posterior dorsal valve interior, with its brachidium. Scale bars: A–C, E–G =5 mm; D, H–L=2 mm.	Fig. 10. A–G.?Tichosina madininensis sp. nov. A–C. Dorsal, lateral and anterior views of the holotype, MNHN-IB-2022-987a. D. Posterior dorsal valve interior, with the adjustor muscles (adj) attached to the hinge plates, and the brachidium, MNHN-IB-2022-987b. E–G. Dorsal, anterior and lateral views of a paratype, MNHN-IB-2022-988. — H–L. Tichosina obesa Cooper, 1977. H–J. Elongate specimen, MNHN-IB-2022-989. K–L. MNHN-IB-2022-990. K. Ventral valve interior of a specimen revealing the teeth and the main muscular cast (adductor, ventral adjustor and diductors (µ). L. Posterior dorsal valve interior, with its brachidium. Scale bars: A–C, E–G =5 mm; D, H–L=2 mm.	2026-05-19	Gaspard, Danièle		Zenodo	biologists	Gaspard, Danièle			
03FB4C21FF8757583B11F95164ABF9D1.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/20313060/files/figure.png	https://doi.org/10.5281/zenodo.20313060	Fig. 11. Tichosina plicata Cooper, 1977. A–C. Dorsal, lateral and anterior views of an adult specimen, MNHN-IB-2022-991. D. Posterior ventral valve interior revealing the deeply impressed cast of muscles (adductor, ventral adjustor and diductor), MNHN-IB-2022-992. E. Dorsal valve interior revealing the cardinal process (ca.pr), dental sockets, hinge plates, brachidium, mantle body wall and net of orange gonads, MNHN-IB-2022-992. F–H. Dorsal, lateral and anterior views of a slightly open specimen, MNHN-IB-2022-993. Scale bars: A–C, F–H=5 mm; D–E =2 mm.	Fig. 11. Tichosina plicata Cooper, 1977. A–C. Dorsal, lateral and anterior views of an adult specimen, MNHN-IB-2022-991. D. Posterior ventral valve interior revealing the deeply impressed cast of muscles (adductor, ventral adjustor and diductor), MNHN-IB-2022-992. E. Dorsal valve interior revealing the cardinal process (ca.pr), dental sockets, hinge plates, brachidium, mantle body wall and net of orange gonads, MNHN-IB-2022-992. F–H. Dorsal, lateral and anterior views of a slightly open specimen, MNHN-IB-2022-993. Scale bars: A–C, F–H=5 mm; D–E =2 mm.	2026-05-19	Gaspard, Danièle		Zenodo	biologists	Gaspard, Danièle			
03FB4C21FF89575A3B2DF91F6209FA77.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/20313062/files/figure.png	https://doi.org/10.5281/zenodo.20313062	Fig. 12. Tichosina solida Cooper, 1977, MNHN-IB-2022-994. A–C. Dorsal, lateral and anterior views of an adult specimen. D. Ventral valve interior (V.V.) of the previous shell showing the teeth (t), withdrawn pedicle, muscles attached to the pedicle and valve floor (adductors = add; adjustor = adj; didductor = did) protected by the spiculate mantle body wall (m.b.w.). E. Dorsal valve interior revealing the cardinal process (ca.pr.), dental sockets (d.s.), hinge plates (h.pl.), and the brachidium with lateral extensions (arrowhead). F. Same dorsal valve (D.V.) slightly tilted posteriorly to reveal the spiculate mantle body wall (m.b.w.), vascula media (v.m.) and the lateral extensions at the external anterior part of the hinge plates (arrowhead). G. Semi-lateral view of the same dorsal valve revealing the length of the lateral extension (arrowhead) and crural process (cr.pr.). Scale bars: A–C, E=5 mm; D, F–G=2 mm.	Fig. 12. Tichosina solida Cooper, 1977, MNHN-IB-2022-994. A–C. Dorsal, lateral and anterior views of an adult specimen. D. Ventral valve interior (V.V.) of the previous shell showing the teeth (t), withdrawn pedicle, muscles attached to the pedicle and valve floor (adductors = add; adjustor = adj; didductor = did) protected by the spiculate mantle body wall (m.b.w.). E. Dorsal valve interior revealing the cardinal process (ca.pr.), dental sockets (d.s.), hinge plates (h.pl.), and the brachidium with lateral extensions (arrowhead). F. Same dorsal valve (D.V.) slightly tilted posteriorly to reveal the spiculate mantle body wall (m.b.w.), vascula media (v.m.) and the lateral extensions at the external anterior part of the hinge plates (arrowhead). G. Semi-lateral view of the same dorsal valve revealing the length of the lateral extension (arrowhead) and crural process (cr.pr.). Scale bars: A–C, E=5 mm; D, F–G=2 mm.	2026-05-19	Gaspard, Danièle		Zenodo	biologists	Gaspard, Danièle			
03FB4C21FF8B575B3B03F94C6513F8CC.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/20313067/files/figure.png	https://doi.org/10.5281/zenodo.20313067	Fig. 13. Erymnia muralifera Cooper, 1977. A–C. Specimen with epibionts and traces of pollution, MNHN-IB-2022-995. D. Dorsal valve tilted semi-laterally revealing the plate (arrow) that links the crural base to the valve floor, adductors (add) and adjustor muscles (adj), MNHN-IB-2022-996. E. Dorsal valve interior of a juvenile from the same location, MNHN-IB-2022-997. F. Ventral valve interior from the same juvenile specimen, mantle body wall (arrowhead). G. Posterior ventral valve interior with traces of pollution, showing small thick teeth and an abraded margin of the foramen (fo), MNHN- IB-2022-998. H. Dorsal valve interior of the same shell, with small cardinal process, deep short dental sockets, brachidium, mantle body wall (m.b.w.) and branched vascula media (v.m.) and vascula lateralis (v.l.). I. Close-up view of the spiculate mantle body wall (arrowhead) and departure of the vascula media and lateralis, beneath the brachial transverse band, of the previous dorsal valve slightly tilted posteriorly. Scale bars: A–C, H =5 mm; D–G, I=2 mm.	Fig. 13. Erymnia muralifera Cooper, 1977. A–C. Specimen with epibionts and traces of pollution, MNHN-IB-2022-995. D. Dorsal valve tilted semi-laterally revealing the plate (arrow) that links the crural base to the valve floor, adductors (add) and adjustor muscles (adj), MNHN-IB-2022-996. E. Dorsal valve interior of a juvenile from the same location, MNHN-IB-2022-997. F. Ventral valve interior from the same juvenile specimen, mantle body wall (arrowhead). G. Posterior ventral valve interior with traces of pollution, showing small thick teeth and an abraded margin of the foramen (fo), MNHN- IB-2022-998. H. Dorsal valve interior of the same shell, with small cardinal process, deep short dental sockets, brachidium, mantle body wall (m.b.w.) and branched vascula media (v.m.) and vascula lateralis (v.l.). I. Close-up view of the spiculate mantle body wall (arrowhead) and departure of the vascula media and lateralis, beneath the brachial transverse band, of the previous dorsal valve slightly tilted posteriorly. Scale bars: A–C, H =5 mm; D–G, I=2 mm.	2026-05-19	Gaspard, Danièle		Zenodo	biologists	Gaspard, Danièle			
03FB4C21FF8C575F3B18FDBB6175FDAF.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/20313069/files/figure.png	https://doi.org/10.5281/zenodo.20313069	Fig. 14. Stenosarina nitens Cooper, 1977. A–B. Dorsal and lateral views of an adult specimen, MNHN- IB-2022-999. C–D. Dorsal and lateral views of another specimen with muscles and setae revealed by transparency, MNHN-IB-2022-1000. E. Ventral valve interior with the teeth, MNHN-IB-2022-1001. F. Dorsal valve interior of the same shell, with the brachidium, MNHN-IB-2022-1001. G. Dorsal valve interior with the brachidium, fragment of lophophore between the crural processes, and some spicules hiding the hinge plates, MNHN-IB-2022-1002. H. Close-up view of the same shell at the inner lateral margin to highlight the presence of setae (white arrowhead). Scale bars: A–F =2 mm; G= 1 mm; H =1 mm.	Fig. 14. Stenosarina nitens Cooper, 1977. A–B. Dorsal and lateral views of an adult specimen, MNHN- IB-2022-999. C–D. Dorsal and lateral views of another specimen with muscles and setae revealed by transparency, MNHN-IB-2022-1000. E. Ventral valve interior with the teeth, MNHN-IB-2022-1001. F. Dorsal valve interior of the same shell, with the brachidium, MNHN-IB-2022-1001. G. Dorsal valve interior with the brachidium, fragment of lophophore between the crural processes, and some spicules hiding the hinge plates, MNHN-IB-2022-1002. H. Close-up view of the same shell at the inner lateral margin to highlight the presence of setae (white arrowhead). Scale bars: A–F =2 mm; G= 1 mm; H =1 mm.	2026-05-19	Gaspard, Danièle		Zenodo	biologists	Gaspard, Danièle			
03FB4C21FF8E57653B04FC3C614BFEDB.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/20313071/files/figure.png	https://doi.org/10.5281/zenodo.20313071	Fig. 15. Terebratulina cailleti Crosse, 1865. A. Adult specimen, MNHN-IB-2022-1003. B. Juvenile specimen, MNHN-IB-2022-1004. C. Pink specimen attached to a congener, itself attached to a calcareous substrate and, a few centimetres away, a very young one, MNHN-IB-2022-1005. D. Juvenile specimen bored by a predator, MNHN-IB-2022-1006.E. Adult ventral valve interior with its frayed pedicle (pe), large teeth, widely extended mantle strengthen by interlocking spicules protecting the soft parts (m.b.w.) and the mantle canals, and setae at the inner margins, MNHN-IB-2022-1007. F. Ventral valve interior without the mantle body wall and the pedicle, exposing the pedicle collar (pe.co.) and the teeth, MNHN-IB-2022-1008. G–I. SEM views of a juvenile shell, MNHN-IB-2022-1075. G. Dorsal valve interior revealing the cardinal process, deep concave dental sockets, high inner socket ridges and an incomplete brachial loop. H. Detail of the crural processes (cr.pr.) not yet fused. I. Close-up view of distal part of a crural process with its fibrous mosaic. Scale bars: A, C–F=2 mm; B=1 mm; G=500 µm; H=200 µm; I=50 µm.	Fig. 15. Terebratulina cailleti Crosse, 1865. A. Adult specimen, MNHN-IB-2022-1003. B. Juvenile specimen, MNHN-IB-2022-1004. C. Pink specimen attached to a congener, itself attached to a calcareous substrate and, a few centimetres away, a very young one, MNHN-IB-2022-1005. D. Juvenile specimen bored by a predator, MNHN-IB-2022-1006.E. Adult ventral valve interior with its frayed pedicle (pe), large teeth, widely extended mantle strengthen by interlocking spicules protecting the soft parts (m.b.w.) and the mantle canals, and setae at the inner margins, MNHN-IB-2022-1007. F. Ventral valve interior without the mantle body wall and the pedicle, exposing the pedicle collar (pe.co.) and the teeth, MNHN-IB-2022-1008. G–I. SEM views of a juvenile shell, MNHN-IB-2022-1075. G. Dorsal valve interior revealing the cardinal process, deep concave dental sockets, high inner socket ridges and an incomplete brachial loop. H. Detail of the crural processes (cr.pr.) not yet fused. I. Close-up view of distal part of a crural process with its fibrous mosaic. Scale bars: A, C–F=2 mm; B=1 mm; G=500 µm; H=200 µm; I=50 µm.	2026-05-19	Gaspard, Danièle		Zenodo	biologists	Gaspard, Danièle			
03FB4C21FF8E57653B04FC3C614BFEDB.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/20313077/files/figure.png	https://doi.org/10.5281/zenodo.20313077	Fig. 16. Terebratulina cailleti Crosse, 1865. A–B. Subadult specimens with their just developed brachial ring, a junction mark (arrowhead) of the two crural processes still being visible, MNHN-IB-2022-1009 and MNHN-IB-2022-1010, respectively. C. Adult dorsal valve interior with its complete ring and a transverse band (tr.b.) projected anteriorly, MNHN-IN-2022-1011. D. Dorsal valve interior from the shell, the ventral valve of which is illustrated in Fig. 15E, with the lophophore (lo) supported by the brachidium, the spiculate mantle body wall (m.b.w.) and some setae at the inner margin, and cardinal process (ca.pr.), MNHN-IB-2022-1007. E. Dorsal valve interior without the brachidium and the lophophore. The inner socket ridge (in.s.r.) and mantle canals are clearly visible as are the brown setae (se) at the inner margin, MNHN-IB-2022-1012. F. Close-up view of the interlocking spicules (white arrowhead) of the previous shell. G. Spicules at the basal arms of the lophophore, MNHN-IB-2022-1007. H. Close-up view near the inner shell margins revealing the details of crenulations: follicular eminence (f.e.), follicular embayment (f.em.), MNHN-IB-2022-1075. Scale bars: A–B, F–G=1 mm; C–E=2 mm; H =200 µm.	Fig. 16. Terebratulina cailleti Crosse, 1865. A–B. Subadult specimens with their just developed brachial ring, a junction mark (arrowhead) of the two crural processes still being visible, MNHN-IB-2022-1009 and MNHN-IB-2022-1010, respectively. C. Adult dorsal valve interior with its complete ring and a transverse band (tr.b.) projected anteriorly, MNHN-IN-2022-1011. D. Dorsal valve interior from the shell, the ventral valve of which is illustrated in Fig. 15E, with the lophophore (lo) supported by the brachidium, the spiculate mantle body wall (m.b.w.) and some setae at the inner margin, and cardinal process (ca.pr.), MNHN-IB-2022-1007. E. Dorsal valve interior without the brachidium and the lophophore. The inner socket ridge (in.s.r.) and mantle canals are clearly visible as are the brown setae (se) at the inner margin, MNHN-IB-2022-1012. F. Close-up view of the interlocking spicules (white arrowhead) of the previous shell. G. Spicules at the basal arms of the lophophore, MNHN-IB-2022-1007. H. Close-up view near the inner shell margins revealing the details of crenulations: follicular eminence (f.e.), follicular embayment (f.em.), MNHN-IB-2022-1075. Scale bars: A–B, F–G=1 mm; C–E=2 mm; H =200 µm.	2026-05-19	Gaspard, Danièle		Zenodo	biologists	Gaspard, Danièle			
03FB4C21FF8E57653B04FC3C614BFEDB.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/20313081/files/figure.png	https://doi.org/10.5281/zenodo.20313081	Fig. 17. A–B. Terebratulina cailleti Crosse, 1865. A. SEM view of the posterior ventral valve of a juvenile specimen with its pedicle collar (pe.co.), limited deltidial plates (d.pl.) on each side of the foramen (fo), and strong teeth (t), MNHN-IB-2022-1075. B. Close-up view of the fibrous pedicle collar of the preceding valve. — C–I. Terebratulina latifrons Dall, 1920. C. Adult fascicostellate shell, MNHN-IB-2022-1013. D. Ventral valve interior coloured orange (pollution), with a pedicle collar, brown gonads beneath the mantle body wall, setae and lophophore detached from the dorsal valve, MNHN- IB-2022-1014. E. Close-up view of the spicules at the basal lophophore arms, MNHN-IB-2022-1014. F. Close-up view on the anterior part of the lophophore and the setae at the inner anterior margin, MNHN-IB-2022-1083. G. Dorsal valve interior with the brachidium differing from Terebratulina cailleti, with a wide transverse band (same shell as D), MNHN-IB-2022-1014. H. SEM view of crenulations near the inner margins to be compared with that of T. cailleti, MNHN-IB-2022-1076. I. Close-up view of the inner margin, revealing juvenile fibres in course of secretion and different sizes of punctae (P), MNHN-IB-2022-1076. Scale bars: A= 500 µm; B, H = 200 µm; C–D, F–G= 2 mm; E= 1 mm; I= 20 µm.	Fig. 17. A–B. Terebratulina cailleti Crosse, 1865. A. SEM view of the posterior ventral valve of a juvenile specimen with its pedicle collar (pe.co.), limited deltidial plates (d.pl.) on each side of the foramen (fo), and strong teeth (t), MNHN-IB-2022-1075. B. Close-up view of the fibrous pedicle collar of the preceding valve. — C–I. Terebratulina latifrons Dall, 1920. C. Adult fascicostellate shell, MNHN-IB-2022-1013. D. Ventral valve interior coloured orange (pollution), with a pedicle collar, brown gonads beneath the mantle body wall, setae and lophophore detached from the dorsal valve, MNHN- IB-2022-1014. E. Close-up view of the spicules at the basal lophophore arms, MNHN-IB-2022-1014. F. Close-up view on the anterior part of the lophophore and the setae at the inner anterior margin, MNHN-IB-2022-1083. G. Dorsal valve interior with the brachidium differing from Terebratulina cailleti, with a wide transverse band (same shell as D), MNHN-IB-2022-1014. H. SEM view of crenulations near the inner margins to be compared with that of T. cailleti, MNHN-IB-2022-1076. I. Close-up view of the inner margin, revealing juvenile fibres in course of secretion and different sizes of punctae (P), MNHN-IB-2022-1076. Scale bars: A= 500 µm; B, H = 200 µm; C–D, F–G= 2 mm; E= 1 mm; I= 20 µm.	2026-05-19	Gaspard, Danièle		Zenodo	biologists	Gaspard, Danièle			
03FB4C21FFB457663B01FE19644DFE30.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/20313081/files/figure.png	https://doi.org/10.5281/zenodo.20313081	Fig. 17. A–B. Terebratulina cailleti Crosse, 1865. A. SEM view of the posterior ventral valve of a juvenile specimen with its pedicle collar (pe.co.), limited deltidial plates (d.pl.) on each side of the foramen (fo), and strong teeth (t), MNHN-IB-2022-1075. B. Close-up view of the fibrous pedicle collar of the preceding valve. — C–I. Terebratulina latifrons Dall, 1920. C. Adult fascicostellate shell, MNHN-IB-2022-1013. D. Ventral valve interior coloured orange (pollution), with a pedicle collar, brown gonads beneath the mantle body wall, setae and lophophore detached from the dorsal valve, MNHN- IB-2022-1014. E. Close-up view of the spicules at the basal lophophore arms, MNHN-IB-2022-1014. F. Close-up view on the anterior part of the lophophore and the setae at the inner anterior margin, MNHN-IB-2022-1083. G. Dorsal valve interior with the brachidium differing from Terebratulina cailleti, with a wide transverse band (same shell as D), MNHN-IB-2022-1014. H. SEM view of crenulations near the inner margins to be compared with that of T. cailleti, MNHN-IB-2022-1076. I. Close-up view of the inner margin, revealing juvenile fibres in course of secretion and different sizes of punctae (P), MNHN-IB-2022-1076. Scale bars: A= 500 µm; B, H = 200 µm; C–D, F–G= 2 mm; E= 1 mm; I= 20 µm.	Fig. 17. A–B. Terebratulina cailleti Crosse, 1865. A. SEM view of the posterior ventral valve of a juvenile specimen with its pedicle collar (pe.co.), limited deltidial plates (d.pl.) on each side of the foramen (fo), and strong teeth (t), MNHN-IB-2022-1075. B. Close-up view of the fibrous pedicle collar of the preceding valve. — C–I. Terebratulina latifrons Dall, 1920. C. Adult fascicostellate shell, MNHN-IB-2022-1013. D. Ventral valve interior coloured orange (pollution), with a pedicle collar, brown gonads beneath the mantle body wall, setae and lophophore detached from the dorsal valve, MNHN- IB-2022-1014. E. Close-up view of the spicules at the basal lophophore arms, MNHN-IB-2022-1014. F. Close-up view on the anterior part of the lophophore and the setae at the inner anterior margin, MNHN-IB-2022-1083. G. Dorsal valve interior with the brachidium differing from Terebratulina cailleti, with a wide transverse band (same shell as D), MNHN-IB-2022-1014. H. SEM view of crenulations near the inner margins to be compared with that of T. cailleti, MNHN-IB-2022-1076. I. Close-up view of the inner margin, revealing juvenile fibres in course of secretion and different sizes of punctae (P), MNHN-IB-2022-1076. Scale bars: A= 500 µm; B, H = 200 µm; C–D, F–G= 2 mm; E= 1 mm; I= 20 µm.	2026-05-19	Gaspard, Danièle		Zenodo	biologists	Gaspard, Danièle			
03FB4C21FFB457663B01FE19644DFE30.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/20313077/files/figure.png	https://doi.org/10.5281/zenodo.20313077	Fig. 16. Terebratulina cailleti Crosse, 1865. A–B. Subadult specimens with their just developed brachial ring, a junction mark (arrowhead) of the two crural processes still being visible, MNHN-IB-2022-1009 and MNHN-IB-2022-1010, respectively. C. Adult dorsal valve interior with its complete ring and a transverse band (tr.b.) projected anteriorly, MNHN-IN-2022-1011. D. Dorsal valve interior from the shell, the ventral valve of which is illustrated in Fig. 15E, with the lophophore (lo) supported by the brachidium, the spiculate mantle body wall (m.b.w.) and some setae at the inner margin, and cardinal process (ca.pr.), MNHN-IB-2022-1007. E. Dorsal valve interior without the brachidium and the lophophore. The inner socket ridge (in.s.r.) and mantle canals are clearly visible as are the brown setae (se) at the inner margin, MNHN-IB-2022-1012. F. Close-up view of the interlocking spicules (white arrowhead) of the previous shell. G. Spicules at the basal arms of the lophophore, MNHN-IB-2022-1007. H. Close-up view near the inner shell margins revealing the details of crenulations: follicular eminence (f.e.), follicular embayment (f.em.), MNHN-IB-2022-1075. Scale bars: A–B, F–G=1 mm; C–E=2 mm; H =200 µm.	Fig. 16. Terebratulina cailleti Crosse, 1865. A–B. Subadult specimens with their just developed brachial ring, a junction mark (arrowhead) of the two crural processes still being visible, MNHN-IB-2022-1009 and MNHN-IB-2022-1010, respectively. C. Adult dorsal valve interior with its complete ring and a transverse band (tr.b.) projected anteriorly, MNHN-IN-2022-1011. D. Dorsal valve interior from the shell, the ventral valve of which is illustrated in Fig. 15E, with the lophophore (lo) supported by the brachidium, the spiculate mantle body wall (m.b.w.) and some setae at the inner margin, and cardinal process (ca.pr.), MNHN-IB-2022-1007. E. Dorsal valve interior without the brachidium and the lophophore. The inner socket ridge (in.s.r.) and mantle canals are clearly visible as are the brown setae (se) at the inner margin, MNHN-IB-2022-1012. F. Close-up view of the interlocking spicules (white arrowhead) of the previous shell. G. Spicules at the basal arms of the lophophore, MNHN-IB-2022-1007. H. Close-up view near the inner shell margins revealing the details of crenulations: follicular eminence (f.e.), follicular embayment (f.em.), MNHN-IB-2022-1075. Scale bars: A–B, F–G=1 mm; C–E=2 mm; H =200 µm.	2026-05-19	Gaspard, Danièle		Zenodo	biologists	Gaspard, Danièle			
03FB4C21FFB757683B00FCAB63DBFC8B.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/20313083/files/figure.png	https://doi.org/10.5281/zenodo.20313083	Fig. 18. A–C. Eucalathis cubensis Cooper, 1977. A. Rounded shell, beaded costellate, MNHN- IB-2022-1016. B–C. Elongate shell, MNH-IB-2022-1017. B. Ventral valve interior. C. Dorsal valve interior. — D–I. Notozyga lowenstami Cooper, 1977. D. Specimen with frayed pedicle, MNHN- IB-2022-1018. E. Costellate shell with intermediaries, MNHN-IB-2022-2-1019. F. Ventral valve interior revealing elevated inner socket ridges and a stout brachidium, MNHN-IB-2022-2-1020. G. Half posterior of dorsal valve interior with inner socket ridge, crural process and transverse band of a translucent juvenile shell, MNHN-IB-2022-1077. H. SEM view of left fibrous crural process, MNHN- IB-2022-1077. I. SEM close-up view of the junction mark of the branches in the middle of the transverse band from G. Scale bars: A, D–F =2 mm; B–C =1 mm; G =500 µm; H= 100 µm; I =50 µm.	Fig. 18. A–C. Eucalathis cubensis Cooper, 1977. A. Rounded shell, beaded costellate, MNHN- IB-2022-1016. B–C. Elongate shell, MNH-IB-2022-1017. B. Ventral valve interior. C. Dorsal valve interior. — D–I. Notozyga lowenstami Cooper, 1977. D. Specimen with frayed pedicle, MNHN- IB-2022-1018. E. Costellate shell with intermediaries, MNHN-IB-2022-2-1019. F. Ventral valve interior revealing elevated inner socket ridges and a stout brachidium, MNHN-IB-2022-2-1020. G. Half posterior of dorsal valve interior with inner socket ridge, crural process and transverse band of a translucent juvenile shell, MNHN-IB-2022-1077. H. SEM view of left fibrous crural process, MNHN- IB-2022-1077. I. SEM close-up view of the junction mark of the branches in the middle of the transverse band from G. Scale bars: A, D–F =2 mm; B–C =1 mm; G =500 µm; H= 100 µm; I =50 µm.	2026-05-19	Gaspard, Danièle		Zenodo	biologists	Gaspard, Danièle			
03FB4C21FFB957693B08FB806230FBBD.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/20313083/files/figure.png	https://doi.org/10.5281/zenodo.20313083	Fig. 18. A–C. Eucalathis cubensis Cooper, 1977. A. Rounded shell, beaded costellate, MNHN- IB-2022-1016. B–C. Elongate shell, MNH-IB-2022-1017. B. Ventral valve interior. C. Dorsal valve interior. — D–I. Notozyga lowenstami Cooper, 1977. D. Specimen with frayed pedicle, MNHN- IB-2022-1018. E. Costellate shell with intermediaries, MNHN-IB-2022-2-1019. F. Ventral valve interior revealing elevated inner socket ridges and a stout brachidium, MNHN-IB-2022-2-1020. G. Half posterior of dorsal valve interior with inner socket ridge, crural process and transverse band of a translucent juvenile shell, MNHN-IB-2022-1077. H. SEM view of left fibrous crural process, MNHN- IB-2022-1077. I. SEM close-up view of the junction mark of the branches in the middle of the transverse band from G. Scale bars: A, D–F =2 mm; B–C =1 mm; G =500 µm; H= 100 µm; I =50 µm.	Fig. 18. A–C. Eucalathis cubensis Cooper, 1977. A. Rounded shell, beaded costellate, MNHN- IB-2022-1016. B–C. Elongate shell, MNH-IB-2022-1017. B. Ventral valve interior. C. Dorsal valve interior. — D–I. Notozyga lowenstami Cooper, 1977. D. Specimen with frayed pedicle, MNHN- IB-2022-1018. E. Costellate shell with intermediaries, MNHN-IB-2022-2-1019. F. Ventral valve interior revealing elevated inner socket ridges and a stout brachidium, MNHN-IB-2022-2-1020. G. Half posterior of dorsal valve interior with inner socket ridge, crural process and transverse band of a translucent juvenile shell, MNHN-IB-2022-1077. H. SEM view of left fibrous crural process, MNHN- IB-2022-1077. I. SEM close-up view of the junction mark of the branches in the middle of the transverse band from G. Scale bars: A, D–F =2 mm; B–C =1 mm; G =500 µm; H= 100 µm; I =50 µm.	2026-05-19	Gaspard, Danièle		Zenodo	biologists	Gaspard, Danièle			
03FB4C21FFB8576C3B12FA0B652CFE13.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/20313087/files/figure.png	https://doi.org/10.5281/zenodo.20313087	Fig. 19. SEM views of Argyrotheca beaumalei sp. nov., holotype, MNHN-IB-2022-1026a. A. Ventral valve interior with the pedicle collar, median septum separating the adductor casts and ending with a wide pit. B. Detailed pit located by a double arrow. C. Dorsal valve interior with large punctae, descending branches of the brachidium widely attached to the valve floor, and double extensions (white arrowhead) on each side of the median septum enclosing a brood-like space between them. D. Detail of the brood-like space. E. Canopy at the inner head of a puncta, corresponding to the basal caecal brush. F. Crest with germinations (small white arrow) and fibrous inner side of a lateral septum extension (located by the double arrow). G. Dorsal valve tilted slightly laterally to clearly reveal the path of the right descending brachial branch from the crura to the attachment to the valve floor, then attachment of the ascending part to the high anterior part of the septum. H. Inner margin side revealing the proximal part of two punctae (P), and submicrometric granules announcing the first formed fibres. Scale bars: A, C, G =500 µm; B, F =100 µm; D =300 µm; E =5 µm; H =50 µm.	Fig. 19. SEM views of Argyrotheca beaumalei sp. nov., holotype, MNHN-IB-2022-1026a. A. Ventral valve interior with the pedicle collar, median septum separating the adductor casts and ending with a wide pit. B. Detailed pit located by a double arrow. C. Dorsal valve interior with large punctae, descending branches of the brachidium widely attached to the valve floor, and double extensions (white arrowhead) on each side of the median septum enclosing a brood-like space between them. D. Detail of the brood-like space. E. Canopy at the inner head of a puncta, corresponding to the basal caecal brush. F. Crest with germinations (small white arrow) and fibrous inner side of a lateral septum extension (located by the double arrow). G. Dorsal valve tilted slightly laterally to clearly reveal the path of the right descending brachial branch from the crura to the attachment to the valve floor, then attachment of the ascending part to the high anterior part of the septum. H. Inner margin side revealing the proximal part of two punctae (P), and submicrometric granules announcing the first formed fibres. Scale bars: A, C, G =500 µm; B, F =100 µm; D =300 µm; E =5 µm; H =50 µm.	2026-05-19	Gaspard, Danièle		Zenodo	biologists	Gaspard, Danièle			
03FB4C21FFBD576E3B0BFE51624EFB92.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/20313089/files/figure.png	https://doi.org/10.5281/zenodo.20313089	Fig. 20. Argyrotheca bermudana Dall, 1911. A–B. Coloured adult and juvenile specimens, MNHN- IB-2022-1027 and MNHN-IB- 2022-1028, respectively. C. Semi-open articulated shell to reveal the dorsal valve interior, MNHN-IB-2022-1029. D. Shell with a bright colour pattern, MNHN-IB- 2022- 1030. E. Ventral valve interior of a shell from the same station, MNHN-IB-2022-1078. F–G. SEM views, MNHN-IB- 2022-1031. F. Ventral valve interior of a shell from the same station, with the pedicle collar (pe.co.), teeth (t), and ventral septum (v.s.) with several pits (arrowheads). G. Close-up view of the pits of the septum. H–J. SEM views of a dorsal valve interior, MNHN-IB-2022-1032. H. Valve interior with the widely open dental sockets (d.s.), thick posterior inner socket ridges, adductor imprints (add), median septum with protuberances (white arrows), and path of the descending lamellae (d.l.) of the brachidium, from the crura to the valve floor followed by the attachment over the higher protuberance of the septum. I. Close-up view of the right lateral dorsal valve revealing the long and wide dental socket and part of the descending lamellae not attached to the valve floor (white arrow). J. Close-up view of the anterior median septum with the protuberances and part of the ascending lamellae attached to it. Scale bars: A, D–E= 1 mm; B–C, F, H =500 µm; G =150 µm; I= 200 µm; J= 150 µm.	Fig. 20. Argyrotheca bermudana Dall, 1911. A–B. Coloured adult and juvenile specimens, MNHN- IB-2022-1027 and MNHN-IB- 2022-1028, respectively. C. Semi-open articulated shell to reveal the dorsal valve interior, MNHN-IB-2022-1029. D. Shell with a bright colour pattern, MNHN-IB- 2022- 1030. E. Ventral valve interior of a shell from the same station, MNHN-IB-2022-1078. F–G. SEM views, MNHN-IB- 2022-1031. F. Ventral valve interior of a shell from the same station, with the pedicle collar (pe.co.), teeth (t), and ventral septum (v.s.) with several pits (arrowheads). G. Close-up view of the pits of the septum. H–J. SEM views of a dorsal valve interior, MNHN-IB-2022-1032. H. Valve interior with the widely open dental sockets (d.s.), thick posterior inner socket ridges, adductor imprints (add), median septum with protuberances (white arrows), and path of the descending lamellae (d.l.) of the brachidium, from the crura to the valve floor followed by the attachment over the higher protuberance of the septum. I. Close-up view of the right lateral dorsal valve revealing the long and wide dental socket and part of the descending lamellae not attached to the valve floor (white arrow). J. Close-up view of the anterior median septum with the protuberances and part of the ascending lamellae attached to it. Scale bars: A, D–E= 1 mm; B–C, F, H =500 µm; G =150 µm; I= 200 µm; J= 150 µm.	2026-05-19	Gaspard, Danièle		Zenodo	biologists	Gaspard, Danièle			
03FB4C21FFBF57703B1CFBDF64D5FD3E.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/20313095/files/figure.png	https://doi.org/10.5281/zenodo.20313095	Fig. 21. A–B. Argyrotheca crassa Cooper, 1977. A. Dorsal view of a specimen, MNHN-IB-2022-1033. B. Wide open shell to expose the dorsal valve interior, MNHN-IB-2022-1034. — C–F. Argyrotheca johnsoni Cooper, 1934, MNHN-IB-2022-1035. C. Dorsal view of a wide costellate shell. D. Semilateral view of the dorsal valve interior revealing the fan-shape of the septum with small protuberances. E. Interior of the same valve with the long dental sockets, small crural processes, brachidium attached to the septum, from its third lateral protuberance, and the muscle imprints. F. Ventral valve of the same shell to expose the wide worn pedicle collar, and the septum with several pits accommodating the protuberances of the dorsal septum. G. Another adult specimen with a heavily abraded posterior ventral valve, MNHN-IB-2022-1036. Scale bars: A, C–G =2 mm; B =1 mm.	Fig. 21. A–B. Argyrotheca crassa Cooper, 1977. A. Dorsal view of a specimen, MNHN-IB-2022-1033. B. Wide open shell to expose the dorsal valve interior, MNHN-IB-2022-1034. — C–F. Argyrotheca johnsoni Cooper, 1934, MNHN-IB-2022-1035. C. Dorsal view of a wide costellate shell. D. Semilateral view of the dorsal valve interior revealing the fan-shape of the septum with small protuberances. E. Interior of the same valve with the long dental sockets, small crural processes, brachidium attached to the septum, from its third lateral protuberance, and the muscle imprints. F. Ventral valve of the same shell to expose the wide worn pedicle collar, and the septum with several pits accommodating the protuberances of the dorsal septum. G. Another adult specimen with a heavily abraded posterior ventral valve, MNHN-IB-2022-1036. Scale bars: A, C–G =2 mm; B =1 mm.	2026-05-19	Gaspard, Danièle		Zenodo	biologists	Gaspard, Danièle			
03FB4C21FFA157713B0DFD7D6112FCA8.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/20313095/files/figure.png	https://doi.org/10.5281/zenodo.20313095	Fig. 21. A–B. Argyrotheca crassa Cooper, 1977. A. Dorsal view of a specimen, MNHN-IB-2022-1033. B. Wide open shell to expose the dorsal valve interior, MNHN-IB-2022-1034. — C–F. Argyrotheca johnsoni Cooper, 1934, MNHN-IB-2022-1035. C. Dorsal view of a wide costellate shell. D. Semilateral view of the dorsal valve interior revealing the fan-shape of the septum with small protuberances. E. Interior of the same valve with the long dental sockets, small crural processes, brachidium attached to the septum, from its third lateral protuberance, and the muscle imprints. F. Ventral valve of the same shell to expose the wide worn pedicle collar, and the septum with several pits accommodating the protuberances of the dorsal septum. G. Another adult specimen with a heavily abraded posterior ventral valve, MNHN-IB-2022-1036. Scale bars: A, C–G =2 mm; B =1 mm.	Fig. 21. A–B. Argyrotheca crassa Cooper, 1977. A. Dorsal view of a specimen, MNHN-IB-2022-1033. B. Wide open shell to expose the dorsal valve interior, MNHN-IB-2022-1034. — C–F. Argyrotheca johnsoni Cooper, 1934, MNHN-IB-2022-1035. C. Dorsal view of a wide costellate shell. D. Semilateral view of the dorsal valve interior revealing the fan-shape of the septum with small protuberances. E. Interior of the same valve with the long dental sockets, small crural processes, brachidium attached to the septum, from its third lateral protuberance, and the muscle imprints. F. Ventral valve of the same shell to expose the wide worn pedicle collar, and the septum with several pits accommodating the protuberances of the dorsal septum. G. Another adult specimen with a heavily abraded posterior ventral valve, MNHN-IB-2022-1036. Scale bars: A, C–G =2 mm; B =1 mm.	2026-05-19	Gaspard, Danièle		Zenodo	biologists	Gaspard, Danièle			
03FB4C21FFA057733B2CFC94616FFD38.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/20313099/files/figure.png	https://doi.org/10.5281/zenodo.20313099	Fig. 22. Argyrotheca lutea (Dall, 1871), SEM views of separate valves, MNHN-IB-2022-1037. A. Ventral valve interior revealing the pedicle collar, long and flattened teeth, septum (S) enlarging anteriorly with several pits. B. Close-up view of the line of pits. C. Close-up view of the crenulated upper surface of the right tooth (t). D. Fibrous mosaic from the anterior inner socket ridge to the descending lamella. E. Dorsal valve interior revealing the long and wide dental sockets, the high inner socket ridges, the descending lamellae till their attachment to the valve floor and then to the high part of the anterior septum with several protuberances, and the deeply impressed muscle casts. F. Close-up view illustrating the area where the descending branch, after a short detachment from the valve floor, ascends to become attached laterally to the septum. G. Detail of the right half area between the descending branch (d.br) and the lateral posterior septum, with the round imprint of the adductor (add). H. Tilted dorsal valve to reveal laterally: the dental socket (d.s.), the adductor (add) and, above all, the locations where the descending and ascending branches are not attached to the valve floor (arrows). I. Close-up view to highlight where the ascending branch (a.br) is attached laterally and over the high part to the septum (S). Scale bars: A, E =2 mm; B, F–H=1 mm; C, I=500 µm; D =200 µm.	Fig. 22. Argyrotheca lutea (Dall, 1871), SEM views of separate valves, MNHN-IB-2022-1037. A. Ventral valve interior revealing the pedicle collar, long and flattened teeth, septum (S) enlarging anteriorly with several pits. B. Close-up view of the line of pits. C. Close-up view of the crenulated upper surface of the right tooth (t). D. Fibrous mosaic from the anterior inner socket ridge to the descending lamella. E. Dorsal valve interior revealing the long and wide dental sockets, the high inner socket ridges, the descending lamellae till their attachment to the valve floor and then to the high part of the anterior septum with several protuberances, and the deeply impressed muscle casts. F. Close-up view illustrating the area where the descending branch, after a short detachment from the valve floor, ascends to become attached laterally to the septum. G. Detail of the right half area between the descending branch (d.br) and the lateral posterior septum, with the round imprint of the adductor (add). H. Tilted dorsal valve to reveal laterally: the dental socket (d.s.), the adductor (add) and, above all, the locations where the descending and ascending branches are not attached to the valve floor (arrows). I. Close-up view to highlight where the ascending branch (a.br) is attached laterally and over the high part to the septum (S). Scale bars: A, E =2 mm; B, F–H=1 mm; C, I=500 µm; D =200 µm.	2026-05-19	Gaspard, Danièle		Zenodo	biologists	Gaspard, Danièle			
03FB4C21FFA257753B75FD6462B4FCEE.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/20313103/files/figure.png	https://doi.org/10.5281/zenodo.20313103	Fig. 23. Argyrotheca rubrotincta (Dall, 1871). A. Adult shell, MNHN-IB-2022-1038. B–D. Dorsal, ventral and anterior views of a shell with brightly coloured intercostae, MNHN-IB-2022-1039.E. Ventral valve interior, MNHN-IB-2022-1040. F. Another ventral valve interior revealing the long teeth, dorsal adjustors (d.adj), and gonads (g), MNHN-IB-2022-1041. G. Brightly coloured dorsal valve interior revealing the red anterior median septum (S), long crural processes and dental sockets (same shell as in E). H. Dorsal valve interior (same shell as in F), slightly less coloured, lophophore (lo) still attached to the inner crural processes, inner descending branches and upper septum, MNHN-IB-2022-1041. Scale bars=1 mm.	Fig. 23. Argyrotheca rubrotincta (Dall, 1871). A. Adult shell, MNHN-IB-2022-1038. B–D. Dorsal, ventral and anterior views of a shell with brightly coloured intercostae, MNHN-IB-2022-1039.E. Ventral valve interior, MNHN-IB-2022-1040. F. Another ventral valve interior revealing the long teeth, dorsal adjustors (d.adj), and gonads (g), MNHN-IB-2022-1041. G. Brightly coloured dorsal valve interior revealing the red anterior median septum (S), long crural processes and dental sockets (same shell as in E). H. Dorsal valve interior (same shell as in F), slightly less coloured, lophophore (lo) still attached to the inner crural processes, inner descending branches and upper septum, MNHN-IB-2022-1041. Scale bars=1 mm.	2026-05-19	Gaspard, Danièle		Zenodo	biologists	Gaspard, Danièle			
03FB4C21FFA4577838B9FC2D6292FA86.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/20313105/files/figure.png	https://doi.org/10.5281/zenodo.20313105	Fig. 24. Argyrotheca schrammi (Crosse & Fischer, 1866). A. Adult shell, MNHN-IB-2022-1042. B. wide open articulated shell to reveal the dorsal valve interior, MNHN-IB-2022-1043. C. Ventral valve interior with long teeth, MNHN-IB-2022-1079. D. Dorsal valve interior with wide open dental sockets, the brachial ribbons, and the median septum with a line of spines on each of its upper sides, MNHN- IB-2022-1044. E–G. SEM views, MNHN-IB-2022-1080. E. Cardinal process (ca.pr.). F. Punctate dental socket. G. Left part of the dorsal valve interior showing the attachment of the brachial descending branch with the part unattached to the valve floor (arrow) and the spines on the septum. Scale bars: A–C, G =1 mm; D =500 µm; E–F= 100 µm.	Fig. 24. Argyrotheca schrammi (Crosse & Fischer, 1866). A. Adult shell, MNHN-IB-2022-1042. B. wide open articulated shell to reveal the dorsal valve interior, MNHN-IB-2022-1043. C. Ventral valve interior with long teeth, MNHN-IB-2022-1079. D. Dorsal valve interior with wide open dental sockets, the brachial ribbons, and the median septum with a line of spines on each of its upper sides, MNHN- IB-2022-1044. E–G. SEM views, MNHN-IB-2022-1080. E. Cardinal process (ca.pr.). F. Punctate dental socket. G. Left part of the dorsal valve interior showing the attachment of the brachial descending branch with the part unattached to the valve floor (arrow) and the spines on the septum. Scale bars: A–C, G =1 mm; D =500 µm; E–F= 100 µm.	2026-05-19	Gaspard, Danièle		Zenodo	biologists	Gaspard, Danièle			
03FB4C21FFA4577838B9FC2D6292FA86.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/20313107/files/figure.png	https://doi.org/10.5281/zenodo.20313107	Fig. 25. Argyrotheca schrammi (Crosse & Fischer, 1866), SEM views. A. Lateral view of a juvenile dorsal valve interior tilted to reveal the high septum with the first spines and the ascending brachial ribbon attached to it, MNHN-IB-2022-1083. B. Posterior part of the same median septum, MNHN- IB-2022-1083. C. Septum of an adult shell with spines along each side of the upper posterior part (add= adductor), MNHN-IB-2022-1080. D. Unusual divided high anterior point of the septum (arrowhead), MNHN-IB-2022-1084. E. Dorsal valve with lophophore (lo) partly covered with a fragment of external epithelium (ex.ep.) (d.l. = descending lamellae), MNHN-IB-2022-1085. F–G. Close-up view at the inner margin, with submicrometric granules (g) surrounded by organic membranes (o.m.) at the limit between the secondary and the primary layers (p.l.), MNHN-IB-2022-1080. H. Inner margin with light fibrous crenulations separated from each other by a wide puncta (P), MNHN-IB-2022-1080. Scale bars: A=250 µm; B–D =150 µm; E=500 µm; F–G =10 µm; H =50 µm.	Fig. 25. Argyrotheca schrammi (Crosse & Fischer, 1866), SEM views. A. Lateral view of a juvenile dorsal valve interior tilted to reveal the high septum with the first spines and the ascending brachial ribbon attached to it, MNHN-IB-2022-1083. B. Posterior part of the same median septum, MNHN- IB-2022-1083. C. Septum of an adult shell with spines along each side of the upper posterior part (add= adductor), MNHN-IB-2022-1080. D. Unusual divided high anterior point of the septum (arrowhead), MNHN-IB-2022-1084. E. Dorsal valve with lophophore (lo) partly covered with a fragment of external epithelium (ex.ep.) (d.l. = descending lamellae), MNHN-IB-2022-1085. F–G. Close-up view at the inner margin, with submicrometric granules (g) surrounded by organic membranes (o.m.) at the limit between the secondary and the primary layers (p.l.), MNHN-IB-2022-1080. H. Inner margin with light fibrous crenulations separated from each other by a wide puncta (P), MNHN-IB-2022-1080. Scale bars: A=250 µm; B–D =150 µm; E=500 µm; F–G =10 µm; H =50 µm.	2026-05-19	Gaspard, Danièle		Zenodo	biologists	Gaspard, Danièle			
03FB4C21FFA9577B3B4FF91D657DFD10.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/20313111/files/figure.png	https://doi.org/10.5281/zenodo.20313111	Fig. 26. A–I. Platidia anomioides (Scacchi & Philippi, 1844). A–B. Dorsal and ventral views of a shell, revealing punctae and the lophophore by transparency, MNHN-IB-2022-1045. C. Ventral valve interior of a shell, MNHN-IB-2022-1046. D–E. Dorsal and ventral views of a shell, the septum, lophophore and brown gonads (go) are seen by transparency. The shell retains its integument covering the foramen, MNHN-IB-2022-1047. F–G. Interior views of separate dorsal and ventral valves of the preceding shell. The integument is still attached to the dorsal valve, the upper part of the septum, lophophore (lo), brown gonads and spicules (spi) around them are revealed (F). The teeth, spicules around the gonads and setae at the inner margins are seen at the ventral valve (G). H. Detail of the brachidium, with the crura, descending branches attached to the lateral parts of the high septal pillar (s.p.) and the departure of the U-shaped broken flanges, MNHN-IB-2022-1086. I. Juvenile specimen, MNHN-IB-2022-1048. — J–K. Platidia davidsoni (Deslongchamps, 1855), MNHN-IB-2022-1049. Dorsal (J) and pustulous external ventral surface (K). — L. Amphithyris buckmani (Thomson, 1918), MNHN-IB-2022-1050, dorsal valve interior with the lophophore curled differently compared to that of species of Platidia Costa, 1852. Scale bars: A–B, H–I =500 µm; C–G, J–K =1 mm; L=300 µm.	Fig. 26. A–I. Platidia anomioides (Scacchi & Philippi, 1844). A–B. Dorsal and ventral views of a shell, revealing punctae and the lophophore by transparency, MNHN-IB-2022-1045. C. Ventral valve interior of a shell, MNHN-IB-2022-1046. D–E. Dorsal and ventral views of a shell, the septum, lophophore and brown gonads (go) are seen by transparency. The shell retains its integument covering the foramen, MNHN-IB-2022-1047. F–G. Interior views of separate dorsal and ventral valves of the preceding shell. The integument is still attached to the dorsal valve, the upper part of the septum, lophophore (lo), brown gonads and spicules (spi) around them are revealed (F). The teeth, spicules around the gonads and setae at the inner margins are seen at the ventral valve (G). H. Detail of the brachidium, with the crura, descending branches attached to the lateral parts of the high septal pillar (s.p.) and the departure of the U-shaped broken flanges, MNHN-IB-2022-1086. I. Juvenile specimen, MNHN-IB-2022-1048. — J–K. Platidia davidsoni (Deslongchamps, 1855), MNHN-IB-2022-1049. Dorsal (J) and pustulous external ventral surface (K). — L. Amphithyris buckmani (Thomson, 1918), MNHN-IB-2022-1050, dorsal valve interior with the lophophore curled differently compared to that of species of Platidia Costa, 1852. Scale bars: A–B, H–I =500 µm; C–G, J–K =1 mm; L=300 µm.	2026-05-19	Gaspard, Danièle		Zenodo	biologists	Gaspard, Danièle			
03FB4C21FFAA577B3B53FD5C61C2F8CA.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/20313111/files/figure.png	https://doi.org/10.5281/zenodo.20313111	Fig. 26. A–I. Platidia anomioides (Scacchi & Philippi, 1844). A–B. Dorsal and ventral views of a shell, revealing punctae and the lophophore by transparency, MNHN-IB-2022-1045. C. Ventral valve interior of a shell, MNHN-IB-2022-1046. D–E. Dorsal and ventral views of a shell, the septum, lophophore and brown gonads (go) are seen by transparency. The shell retains its integument covering the foramen, MNHN-IB-2022-1047. F–G. Interior views of separate dorsal and ventral valves of the preceding shell. The integument is still attached to the dorsal valve, the upper part of the septum, lophophore (lo), brown gonads and spicules (spi) around them are revealed (F). The teeth, spicules around the gonads and setae at the inner margins are seen at the ventral valve (G). H. Detail of the brachidium, with the crura, descending branches attached to the lateral parts of the high septal pillar (s.p.) and the departure of the U-shaped broken flanges, MNHN-IB-2022-1086. I. Juvenile specimen, MNHN-IB-2022-1048. — J–K. Platidia davidsoni (Deslongchamps, 1855), MNHN-IB-2022-1049. Dorsal (J) and pustulous external ventral surface (K). — L. Amphithyris buckmani (Thomson, 1918), MNHN-IB-2022-1050, dorsal valve interior with the lophophore curled differently compared to that of species of Platidia Costa, 1852. Scale bars: A–B, H–I =500 µm; C–G, J–K =1 mm; L=300 µm.	Fig. 26. A–I. Platidia anomioides (Scacchi & Philippi, 1844). A–B. Dorsal and ventral views of a shell, revealing punctae and the lophophore by transparency, MNHN-IB-2022-1045. C. Ventral valve interior of a shell, MNHN-IB-2022-1046. D–E. Dorsal and ventral views of a shell, the septum, lophophore and brown gonads (go) are seen by transparency. The shell retains its integument covering the foramen, MNHN-IB-2022-1047. F–G. Interior views of separate dorsal and ventral valves of the preceding shell. The integument is still attached to the dorsal valve, the upper part of the septum, lophophore (lo), brown gonads and spicules (spi) around them are revealed (F). The teeth, spicules around the gonads and setae at the inner margins are seen at the ventral valve (G). H. Detail of the brachidium, with the crura, descending branches attached to the lateral parts of the high septal pillar (s.p.) and the departure of the U-shaped broken flanges, MNHN-IB-2022-1086. I. Juvenile specimen, MNHN-IB-2022-1048. — J–K. Platidia davidsoni (Deslongchamps, 1855), MNHN-IB-2022-1049. Dorsal (J) and pustulous external ventral surface (K). — L. Amphithyris buckmani (Thomson, 1918), MNHN-IB-2022-1050, dorsal valve interior with the lophophore curled differently compared to that of species of Platidia Costa, 1852. Scale bars: A–B, H–I =500 µm; C–G, J–K =1 mm; L=300 µm.	2026-05-19	Gaspard, Danièle		Zenodo	biologists	Gaspard, Danièle			
03FB4C21FFAD577C3B61FDA363F5FAC0.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/20313111/files/figure.png	https://doi.org/10.5281/zenodo.20313111	Fig. 26. A–I. Platidia anomioides (Scacchi & Philippi, 1844). A–B. Dorsal and ventral views of a shell, revealing punctae and the lophophore by transparency, MNHN-IB-2022-1045. C. Ventral valve interior of a shell, MNHN-IB-2022-1046. D–E. Dorsal and ventral views of a shell, the septum, lophophore and brown gonads (go) are seen by transparency. The shell retains its integument covering the foramen, MNHN-IB-2022-1047. F–G. Interior views of separate dorsal and ventral valves of the preceding shell. The integument is still attached to the dorsal valve, the upper part of the septum, lophophore (lo), brown gonads and spicules (spi) around them are revealed (F). The teeth, spicules around the gonads and setae at the inner margins are seen at the ventral valve (G). H. Detail of the brachidium, with the crura, descending branches attached to the lateral parts of the high septal pillar (s.p.) and the departure of the U-shaped broken flanges, MNHN-IB-2022-1086. I. Juvenile specimen, MNHN-IB-2022-1048. — J–K. Platidia davidsoni (Deslongchamps, 1855), MNHN-IB-2022-1049. Dorsal (J) and pustulous external ventral surface (K). — L. Amphithyris buckmani (Thomson, 1918), MNHN-IB-2022-1050, dorsal valve interior with the lophophore curled differently compared to that of species of Platidia Costa, 1852. Scale bars: A–B, H–I =500 µm; C–G, J–K =1 mm; L=300 µm.	Fig. 26. A–I. Platidia anomioides (Scacchi & Philippi, 1844). A–B. Dorsal and ventral views of a shell, revealing punctae and the lophophore by transparency, MNHN-IB-2022-1045. C. Ventral valve interior of a shell, MNHN-IB-2022-1046. D–E. Dorsal and ventral views of a shell, the septum, lophophore and brown gonads (go) are seen by transparency. The shell retains its integument covering the foramen, MNHN-IB-2022-1047. F–G. Interior views of separate dorsal and ventral valves of the preceding shell. The integument is still attached to the dorsal valve, the upper part of the septum, lophophore (lo), brown gonads and spicules (spi) around them are revealed (F). The teeth, spicules around the gonads and setae at the inner margins are seen at the ventral valve (G). H. Detail of the brachidium, with the crura, descending branches attached to the lateral parts of the high septal pillar (s.p.) and the departure of the U-shaped broken flanges, MNHN-IB-2022-1086. I. Juvenile specimen, MNHN-IB-2022-1048. — J–K. Platidia davidsoni (Deslongchamps, 1855), MNHN-IB-2022-1049. Dorsal (J) and pustulous external ventral surface (K). — L. Amphithyris buckmani (Thomson, 1918), MNHN-IB-2022-1050, dorsal valve interior with the lophophore curled differently compared to that of species of Platidia Costa, 1852. Scale bars: A–B, H–I =500 µm; C–G, J–K =1 mm; L=300 µm.	2026-05-19	Gaspard, Danièle		Zenodo	biologists	Gaspard, Danièle			
03FB4C21FFAD577E3B6AF90F6447FCDC.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/20313114/files/figure.png	https://doi.org/10.5281/zenodo.20313114	Fig. 27. A–C. Phaneropora galatheae Zezina, 1981. A. Tiny specimen, MNHN-IB-2022-1051. B–C. Interior dorsal and ventral valves, MNHN-IB-2022-1052. — D–M. Dallina floridana (Pourtalès, 1868). D–I. Dorsal, lateral and anterior views of two morphotypes of the species (wide and elongate), MNHN-IB-2022-1053 (D–F) and MNHN-IB-2022-1054 (G–I). J. Dorsal valve interior with its brachidium, MNHN-IB-2022-1055. K. Dorsal valve interior to observe the septalium and the long loop brachidium free from the septum, MNHN-IB-2022-1056. L. Juvenile shell of the species, MNHN-IB-2022-1057. M. Close-up view at the brown margin line of specimen (J) to reveal the setae (arrowhead). Scale bars: A–C, L=1 mm; D–K =5 mm; M=2 mm.	Fig. 27. A–C. Phaneropora galatheae Zezina, 1981. A. Tiny specimen, MNHN-IB-2022-1051. B–C. Interior dorsal and ventral valves, MNHN-IB-2022-1052. — D–M. Dallina floridana (Pourtalès, 1868). D–I. Dorsal, lateral and anterior views of two morphotypes of the species (wide and elongate), MNHN-IB-2022-1053 (D–F) and MNHN-IB-2022-1054 (G–I). J. Dorsal valve interior with its brachidium, MNHN-IB-2022-1055. K. Dorsal valve interior to observe the septalium and the long loop brachidium free from the septum, MNHN-IB-2022-1056. L. Juvenile shell of the species, MNHN-IB-2022-1057. M. Close-up view at the brown margin line of specimen (J) to reveal the setae (arrowhead). Scale bars: A–C, L=1 mm; D–K =5 mm; M=2 mm.	2026-05-19	Gaspard, Danièle		Zenodo	biologists	Gaspard, Danièle			
03FB4C21FFAF577F3B06FAAB6190F80C.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/20313114/files/figure.png	https://doi.org/10.5281/zenodo.20313114	Fig. 27. A–C. Phaneropora galatheae Zezina, 1981. A. Tiny specimen, MNHN-IB-2022-1051. B–C. Interior dorsal and ventral valves, MNHN-IB-2022-1052. — D–M. Dallina floridana (Pourtalès, 1868). D–I. Dorsal, lateral and anterior views of two morphotypes of the species (wide and elongate), MNHN-IB-2022-1053 (D–F) and MNHN-IB-2022-1054 (G–I). J. Dorsal valve interior with its brachidium, MNHN-IB-2022-1055. K. Dorsal valve interior to observe the septalium and the long loop brachidium free from the septum, MNHN-IB-2022-1056. L. Juvenile shell of the species, MNHN-IB-2022-1057. M. Close-up view at the brown margin line of specimen (J) to reveal the setae (arrowhead). Scale bars: A–C, L=1 mm; D–K =5 mm; M=2 mm.	Fig. 27. A–C. Phaneropora galatheae Zezina, 1981. A. Tiny specimen, MNHN-IB-2022-1051. B–C. Interior dorsal and ventral valves, MNHN-IB-2022-1052. — D–M. Dallina floridana (Pourtalès, 1868). D–I. Dorsal, lateral and anterior views of two morphotypes of the species (wide and elongate), MNHN-IB-2022-1053 (D–F) and MNHN-IB-2022-1054 (G–I). J. Dorsal valve interior with its brachidium, MNHN-IB-2022-1055. K. Dorsal valve interior to observe the septalium and the long loop brachidium free from the septum, MNHN-IB-2022-1056. L. Juvenile shell of the species, MNHN-IB-2022-1057. M. Close-up view at the brown margin line of specimen (J) to reveal the setae (arrowhead). Scale bars: A–C, L=1 mm; D–K =5 mm; M=2 mm.	2026-05-19	Gaspard, Danièle		Zenodo	biologists	Gaspard, Danièle			
03FB4C21FFAF577F3B06FAAB6190F80C.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/20313116/files/figure.png	https://doi.org/10.5281/zenodo.20313116	Fig. 28. Dallina floridana (Pourtalès, 1868). A. Juvenile ventral valve, MNHN-IB-2022-1058. B–D. SEM views of a posterior juvenile ventral valve, MNHN-IB-2022-1059a. B. With the minute deltidial plates, teeth and septal pillar. C. Detail of the ventral septal pillar. D. Detail of the right tooth. E. Juvenile dorsal valve interior with the beginning descending branches and the hood-like septal pillar, MNHN-IB-2022-1060. F–G. SEM views of a juvenile stage of dorsal valve interior (same shell as B–D), MNHN-IB-2022-1059b. F. Juvenile with the septal pillar and the lophophore. G. Close-up view of the hood-like septal pillar. H. Juvenile specimen with its lophophore, MNHN-IB-2022-1061. I–J. SEM details of the lophophore cirri (same valve as H). Scale bars: A–B, F, H= 1 mm; C = 400 µm; D= 150 µm; E =500 µm; G =100 µm; I= 200 µm; J =30 µm.	Fig. 28. Dallina floridana (Pourtalès, 1868). A. Juvenile ventral valve, MNHN-IB-2022-1058. B–D. SEM views of a posterior juvenile ventral valve, MNHN-IB-2022-1059a. B. With the minute deltidial plates, teeth and septal pillar. C. Detail of the ventral septal pillar. D. Detail of the right tooth. E. Juvenile dorsal valve interior with the beginning descending branches and the hood-like septal pillar, MNHN-IB-2022-1060. F–G. SEM views of a juvenile stage of dorsal valve interior (same shell as B–D), MNHN-IB-2022-1059b. F. Juvenile with the septal pillar and the lophophore. G. Close-up view of the hood-like septal pillar. H. Juvenile specimen with its lophophore, MNHN-IB-2022-1061. I–J. SEM details of the lophophore cirri (same valve as H). Scale bars: A–B, F, H= 1 mm; C = 400 µm; D= 150 µm; E =500 µm; G =100 µm; I= 200 µm; J =30 µm.	2026-05-19	Gaspard, Danièle		Zenodo	biologists	Gaspard, Danièle			
03FB4C21FFD057033B41FD9B6207FD5C.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/20313118/files/figure.png	https://doi.org/10.5281/zenodo.20313118	Fig. 29. Megerlia echinata (Fischer & Oehlert, 1890). A–B. Adult ventral and dorsal valves of a shell, MNHN-IB-2022-1062. C. Shell with pustulous external ventral valve (same station), muscle areas are visible by transparency, MNHN-IB-2022-1063. D. Inner side of the same valve, the strong ventral adjustors are visible as well as the integument and some setae at the inner anterior margin. E. SEM inner view of a fragmented posterior ventral valve, revealing the teeth and short septum, MNHN-IB-2022-1087. F. Dorsal valve interior, from the same location, adorned with radial lines of protuberances, revealing a ring-like brachidium attached to the septum, MNHN-IB-2022-1064. G. Dorsal valve interior from same shell as in (D) with the lophophore and heavily spiculate mantle. H. SEM view of the inner margin of a valve, highlighting the proximal double protuberances and the distribution of punctae, MNHN- IB-2022-1064. I. SEM view of fibres (f) composed of submicrometric granules, MNHN-IB-2022-1064. Scale bars: A–B =5 mm; C–D, G =1 mm; E =3 mm; F =2 mm; H= 300 µm; I= 4 µm.	Fig. 29. Megerlia echinata (Fischer & Oehlert, 1890). A–B. Adult ventral and dorsal valves of a shell, MNHN-IB-2022-1062. C. Shell with pustulous external ventral valve (same station), muscle areas are visible by transparency, MNHN-IB-2022-1063. D. Inner side of the same valve, the strong ventral adjustors are visible as well as the integument and some setae at the inner anterior margin. E. SEM inner view of a fragmented posterior ventral valve, revealing the teeth and short septum, MNHN-IB-2022-1087. F. Dorsal valve interior, from the same location, adorned with radial lines of protuberances, revealing a ring-like brachidium attached to the septum, MNHN-IB-2022-1064. G. Dorsal valve interior from same shell as in (D) with the lophophore and heavily spiculate mantle. H. SEM view of the inner margin of a valve, highlighting the proximal double protuberances and the distribution of punctae, MNHN- IB-2022-1064. I. SEM view of fibres (f) composed of submicrometric granules, MNHN-IB-2022-1064. Scale bars: A–B =5 mm; C–D, G =1 mm; E =3 mm; F =2 mm; H= 300 µm; I= 4 µm.	2026-05-19	Gaspard, Danièle		Zenodo	biologists	Gaspard, Danièle			
