Jurassic bivalves from the Spiti area of the Himalayas, northern India Author Fuersich, Franz T. https://orcid.org/0000-0002-0844-9297 Universitaet Erlangen-Nuernberg, GeoZentrum Nordbayern, FG Palaeoumwelt, Lowenichstrasse 28, 91054 Erlangen, Germany franz.fuersich@fau.de Author Alberti, Matthias State Key Laboratory for Mineral Deposits Research, School of Earth Sciences and Engineering, Centre for Research and Education on Biological Evolution and Environment and Frontiers Science Center for Critical Earth Material Cycling, Nanjing University, Nanjing 210023, China Author Pandey, Dhirendra K. https://orcid.org/0000-0002-7721-9604 Department of Earth and Environmental Science, KSKV Kachchh University, Bhuj, India Author Ayoub-Hannaa, Wagih S. Geology Department, Faculty of Science, Minufiya University, El-Minufiya, Shibin El Kom, Egypt text Zitteliana 2022 2022-08-11 96 153 178 http://dx.doi.org/10.3897/zitteliana.96.87253 journal article http://dx.doi.org/10.3897/zitteliana.96.87253 2747-8106-96-153 191199E07F3E4E09A3774ADFBF93A248 AFA9059B36235BFF9BA3E9B7BE816DC1 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