Loquitzella mesodevonica Zagora, 1968

Maillet, Sebastien, Milhau, Bruno, Vreulx, Michel & Posada, Luis-Carlos Sánchez De, 2016, Givetian ostracods of the Candás Formation (Asturias, North-western Spain): taxonomy, stratigraphy, palaeoecology, relationship to global events and palaeogeographical implications, Zootaxa 4068 (1), pp. 1-78 : 45-46

Loquitzella mesodevonica Zagora, 1968

(Pl. III: Figs. 7 & 8)

? 1963 Euglyphella sp. 1; Le Fèvre: pl. 6, figs. 84–85.

1968 Loquitzella mesodevonica nov. sp.; Zagora: 55–56, pl. 12, figs. 15–16.

1968 Loquitzella mesodevonica Zagora; Zagora & Zagora: tabl. 1.

1974 Loquitzella mesodevonica Zagora ; Blumenstengel: pl. 4, figs. 3–4.

1977 Loquitzella mesodevonica Zagora ; Becker & Sánchez de Posada: 158–159, pl. 7, figs. 9–11, pl. 14, fig. 1–3. 1979 Loquitzella sp. 59, aff. Loquitzella mesodevonica Zagora ; Feist & Groos-Uffenorde: 145, pl. 6, figs. 41–42. 1985 Loquitzella sp. 59, aff. Loquitzella mesodevonica Zagora ; Lethiers et al.: 71, 73, pl. 11, fig. 11. 2004 Loquitzella mesodevonica Zagora ; Becker in Becker et al.: 63–64, pl. 8, figs. 5–7. 2005 Loquitzella sp. 59, aff. L. mesodevonica sensu Groos-Uffenorde, 1979 ; Dojen: pl. 17, fig. 11. 2013 Loquitzella aff. mesodevonica Zagora ; Maillet: 131, pl. XVII, figs. 16–18.

Material. 7 specimens (1 C, 4 V, 2 F).

Diagnosis. Zagora (1968, p. 56).

Description. Large equivalve carapace, sub-triangular in lateral view. Carapace slender posteriorly. Hmax at 1/ 6 anterior; Lmax at 1/4 dorsal; Wmax at 1/3 anterior and mid-height. Straight dorsal margin. Slightly convex ventral margin, oblique posteriorly. Ventral and dorsal margins converging posteriorly. Flattened anterior margin, regularly convex and forming an angle of about 120° with the dorsal margin. Posterior end very narrow (1/3 of Hmax) and regularly convex. Anterior part of the carapace clearly higher than the posterior one. Whole surface of the carapace, including free margins, papillose. Some nodes or slight spines, orientated posteriorly, pointing over the posterior margin of the valves. Curved ridge beginning in the antero-ventral part (at 1/3 anterior and 1/3 ventral) and pointing over the dorsal margin at mid-length.

Discussion. This species, very characteristic by its morphology, remains quite rare in the Givetian of Asturias. Occurrences. Givetian (Moniello Fm and Candás Fm, mb A), Asturias (Peran-Perlora section), Middle/Upper Givetian, Mouthoumet Massif (Berco Petito section); Givetian, Morocco; Middle Devonian, Harz; Lower Devonian, Celtiberia, Thuringia and Montagne Noire.