Cytherellina ? sp. P1

(Pl. II: Fig. 21)

2013 Cytherellina ? sp. P1; Maillet: 105, pl. XIII, fig. 24.

Material. 1 specimen (1 C).

Description. Large very elongated carapace, bean-shaped in lateral view, bi-convex in dorsal view. Overlap of the larger LV over the RV slight at free margins and more pronounced antero- and postero-dorsally. Hmax at 1/4 anterior; Lmax slightly ventral; Wmax median. Lmax = 2Hmax. Straight dorsal margin oblique from anterior towards posterior part. Straight ventral margin. Dorsal and ventral margins slightly converging posteriorly. Regularly convex anterior margin forming an angle of about 130° with dorsal margin. Regularly convex posterior margin, forming an angle of about 140° with dorsal margin. Anterior part of the carapace higher than the posterior one. Surface smooth.

Discussion. General outline of the carapace and valves overlapping are typical of the Cytherellina genus. However, only one specimen was collected, making it difficult to undoubtedly assign it to this genus.

Occurrences. Middle Givetian (Candás Fm, mb A), Asturias (Peran-Perlora section).