taxonID	type	format	identifier	references	title	description	created	creator	contributor	publisher	audience	source	license	rightsHolder	datasetID
3DAD6FB9CA52560FA9C94DAD3C3AA637.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://binary.pensoft.net/fig/1565671	https://doi.org/10.3897/zse.102.172590.figure2	Figure 2. Habitus of Nematomenia quattriniae sp. nov. A. Holotype (right) (USNM 1716720) and paratype 2 (left) (USNM 1720103) preserved in 95 % ethanol (arrows indicating the dorsal keel). B. Detail of the border of the atrio-buccal cavity (indicated by arrow) in paratype 1 (95 % ethanol). C. Detail of the atrio-buccal cavity (indicated by arrow) in paratype 2 (feeding on the hydrozoan), corresponding with the green square in A. D. Detail of the mantle sclerites, corresponding with the yellow square in A. The posterior end of the specimen is indicated with a star. Scale bar: 1 mm.	Figure 2. Habitus of Nematomenia quattriniae sp. nov. A. Holotype (right) (USNM 1716720) and paratype 2 (left) (USNM 1720103) preserved in 95 % ethanol (arrows indicating the dorsal keel). B. Detail of the border of the atrio-buccal cavity (indicated by arrow) in paratype 1 (95 % ethanol). C. Detail of the atrio-buccal cavity (indicated by arrow) in paratype 2 (feeding on the hydrozoan), corresponding with the green square in A. D. Detail of the mantle sclerites, corresponding with the yellow square in A. The posterior end of the specimen is indicated with a star. Scale bar: 1 mm.	2026-03-20	Cobo, M. Carmen;Marques, Antonio C.;Tweedt, Sarah M.;Strong, Ellen E.		Zenodo	biologists	Cobo, M. Carmen;Marques, Antonio C.;Tweedt, Sarah M.;Strong, Ellen E.			
3DAD6FB9CA52560FA9C94DAD3C3AA637.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://binary.pensoft.net/fig/1565672	https://doi.org/10.3897/zse.102.172590.figure3	Figure 3. Field images. A. Image of the living animal (holotype: USNM 1716720) (credit: P. Rodríguez Flores / Smithsonian). B. Detail of the carina, corresponding with yellow square in A. C, D. Stills from ROV video footage. Scale bar: 1 mm (A).	Figure 3. Field images. A. Image of the living animal (holotype: USNM 1716720) (credit: P. Rodríguez Flores / Smithsonian). B. Detail of the carina, corresponding with yellow square in A. C, D. Stills from ROV video footage. Scale bar: 1 mm (A).	2026-03-20	Cobo, M. Carmen;Marques, Antonio C.;Tweedt, Sarah M.;Strong, Ellen E.		Zenodo	biologists	Cobo, M. Carmen;Marques, Antonio C.;Tweedt, Sarah M.;Strong, Ellen E.			
3DAD6FB9CA52560FA9C94DAD3C3AA637.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://binary.pensoft.net/fig/1565673	https://doi.org/10.3897/zse.102.172590.figure4	Figure 4. Sclerites of Nematomenia quattriniae sp. nov. A. Scanning electron micrograph of the anterior region of paratype 2 (USNM 1720103) showing the arrangement of the sclerites. B, C. Detail of the sclerites (corresponding with A). D. Light micrograph (Nomarski) of the sclerites of the holotype (USNM 1716720). E. Light micrograph of the sclerites. Sclerite types: leaf-shaped scales type 1 (D 1, E 1); leaf-shaped scales type 2 (E 3, D 4, D 3, E 2); leaf-shaped scales type 3 (D 5); leaf-shaped scales type 4 (E 4); oar-shaped sclerites (B *); acicular sclerites (B **).	Figure 4. Sclerites of Nematomenia quattriniae sp. nov. A. Scanning electron micrograph of the anterior region of paratype 2 (USNM 1720103) showing the arrangement of the sclerites. B, C. Detail of the sclerites (corresponding with A). D. Light micrograph (Nomarski) of the sclerites of the holotype (USNM 1716720). E. Light micrograph of the sclerites. Sclerite types: leaf-shaped scales type 1 (D 1, E 1); leaf-shaped scales type 2 (E 3, D 4, D 3, E 2); leaf-shaped scales type 3 (D 5); leaf-shaped scales type 4 (E 4); oar-shaped sclerites (B *); acicular sclerites (B **).	2026-03-20	Cobo, M. Carmen;Marques, Antonio C.;Tweedt, Sarah M.;Strong, Ellen E.		Zenodo	biologists	Cobo, M. Carmen;Marques, Antonio C.;Tweedt, Sarah M.;Strong, Ellen E.			
3DAD6FB9CA52560FA9C94DAD3C3AA637.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://binary.pensoft.net/fig/1565674	https://doi.org/10.3897/zse.102.172590.figure5	Figure 5. Serial sections of Nematomenia quattriniae sp. nov. (USNM 1716720) from the anterior to the posterior end of the animal (sections 5 µm; scale bar 50 µm). A – H. Anterior region; I – L. Posterior region. (at – atrium; fo – foregut; pp – pedal pit; cg – cerebral ganglion; dg – dorsal gland; pg – pedal gland; pf – pedal fold; vfg – ventrolateral foregut glands; rs – radular sac; vr – ventral subradular pouch; es – esophagus; mg – midgut; go – gonads; pc – pericardium; sr – seminal receptacle; sd – spawning duct; sv – seminal vesicle; pcd – pericardioducts; re – rectum; mc – mantle cavity).	Figure 5. Serial sections of Nematomenia quattriniae sp. nov. (USNM 1716720) from the anterior to the posterior end of the animal (sections 5 µm; scale bar 50 µm). A – H. Anterior region; I – L. Posterior region. (at – atrium; fo – foregut; pp – pedal pit; cg – cerebral ganglion; dg – dorsal gland; pg – pedal gland; pf – pedal fold; vfg – ventrolateral foregut glands; rs – radular sac; vr – ventral subradular pouch; es – esophagus; mg – midgut; go – gonads; pc – pericardium; sr – seminal receptacle; sd – spawning duct; sv – seminal vesicle; pcd – pericardioducts; re – rectum; mc – mantle cavity).	2026-03-20	Cobo, M. Carmen;Marques, Antonio C.;Tweedt, Sarah M.;Strong, Ellen E.		Zenodo	biologists	Cobo, M. Carmen;Marques, Antonio C.;Tweedt, Sarah M.;Strong, Ellen E.			
3DAD6FB9CA52560FA9C94DAD3C3AA637.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://binary.pensoft.net/fig/1565675	https://doi.org/10.3897/zse.102.172590.figure6	Figure 6. Anatomy of Nematomenia quattriniae sp. nov. (USNM 1716720). A, B. Reconstruction of the internal anatomy of the anterior and posterior regions, respectively (scale bar 50 µm). C. Section of radula denticles. D. Section of radula base. E. Radula reconstruction (scale bar 5 µm). F, G. Sections of the anterior foregut and midgut, respectively. Yellow squares indicate nematocysts within a cellular aggregation in the mouth and anterior digestive tract (F) and dispersed in the midgut (G) (scale bar 55 µm). (at – atrium; fo – foregut; pp – pedal pit; cg – cerebral ganglion; dg – dorsal gland; pg – pedal gland; pf – pedal fold; vfg – ventrolateral foregut glands; rs – radular sac; vr – ventral subradular pouch; es – esophagus; mg – midgut; go – gonads; pc – pericardium; sr – seminal receptacle; sd – spawning duct; sv – seminal vesicle; pcd – pericardioducts; re – rectum; mc – mantle cavity).	Figure 6. Anatomy of Nematomenia quattriniae sp. nov. (USNM 1716720). A, B. Reconstruction of the internal anatomy of the anterior and posterior regions, respectively (scale bar 50 µm). C. Section of radula denticles. D. Section of radula base. E. Radula reconstruction (scale bar 5 µm). F, G. Sections of the anterior foregut and midgut, respectively. Yellow squares indicate nematocysts within a cellular aggregation in the mouth and anterior digestive tract (F) and dispersed in the midgut (G) (scale bar 55 µm). (at – atrium; fo – foregut; pp – pedal pit; cg – cerebral ganglion; dg – dorsal gland; pg – pedal gland; pf – pedal fold; vfg – ventrolateral foregut glands; rs – radular sac; vr – ventral subradular pouch; es – esophagus; mg – midgut; go – gonads; pc – pericardium; sr – seminal receptacle; sd – spawning duct; sv – seminal vesicle; pcd – pericardioducts; re – rectum; mc – mantle cavity).	2026-03-20	Cobo, M. Carmen;Marques, Antonio C.;Tweedt, Sarah M.;Strong, Ellen E.		Zenodo	biologists	Cobo, M. Carmen;Marques, Antonio C.;Tweedt, Sarah M.;Strong, Ellen E.			
3DAD6FB9CA52560FA9C94DAD3C3AA637.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://binary.pensoft.net/fig/1565676	https://doi.org/10.3897/zse.102.172590.figure7	Figure 7. Maximum likelihood phylogenetic reconstruction based on COI showing the position of the new species described in this work. Bootstrap support values ≥ 50 are shown. Scale bar: substitutions per site. Shaded box: Dondersiidae. The new Nematomenia species is highlighted with a different color.	Figure 7. Maximum likelihood phylogenetic reconstruction based on COI showing the position of the new species described in this work. Bootstrap support values ≥ 50 are shown. Scale bar: substitutions per site. Shaded box: Dondersiidae. The new Nematomenia species is highlighted with a different color.	2026-03-20	Cobo, M. Carmen;Marques, Antonio C.;Tweedt, Sarah M.;Strong, Ellen E.		Zenodo	biologists	Cobo, M. Carmen;Marques, Antonio C.;Tweedt, Sarah M.;Strong, Ellen E.			
