Palaeonucula stoliczkai Cox, 1940

Plate 1, fig. 3a, b

*1940 Nucula (Palaeonucula) stoliczkai sp. nov. - Cox: 20, pl. 1, figs 21-23.

1956 Nucula (Palaeonucula) stoliczkai Cox - Agrawal: 52, pl. 7, fig. 3b.

1980 Palaeonucula stoliczkai Cox - Kanjilal: 339, pl. 1, figs 13-14.

1995 Palaeonucula stoliczkai Cox 1940 - Jaitly et al.: 158, pl. 2, figs 7-8.

Material.

One flattened articulated specimen from the Ferruginous Oolite Member at Langza (SNSB-BSPG 2020 XCIX 34).

Description and remarks.

The laterally strongly compressed specimen (H: 8.6 mm, L: 11.9 mm) is rounded trigonal in outline and longer than high. The ventral margin is strongly convex, the anterior margin obliquely truncated, forming a blunt angle with the ventral margin and a very obtuse angle with the faintly convex anterodorsal margin. The posterior margin is narrowly rounded. The umbo is prominent. The rounded anterior umbonal ridge extends to the anteroventral margin. Due to the compressed nature of the shell, features such as lunule could not be observed. The surface of the shell is covered with fine commarginal growth lines. Internal features not seen.

Although the hinge could not be observed, the specimen can be safely placed in P. stoliczkai as it closely resembles Cox’ species in outline.

Subclass Autobranchia Grobben, 1894

Order Arcida Gray, 1854