Pterineidae Miller, 1877

Jagt-Yazykova, Elena, Krawczyński, Wojciech & Rakociński, Michał, 2006, Molluscs from the Early Frasnian Goniatite Level at Kostomłoty in the Holy Cross Mountains, Poland, Acta Palaeontologica Polonica 51 (4), pp. 707-718 : 716

Family Pterineidae Miller, 1877

Leptodesma sp. ( Fig. 6R ).—A single pyritised internal mould has been found. The characteristic shell shape, the long and simple hinge margin and medium−sized prosogyre top suggest it is assignable to Leptodesma . However, the absence of diagnostic features on this internal mould of a juvenile shell, e.g., ornamentation, makes recognition of the species difficult. Leptodesma has a worldwide distribution in late Palaeozoic (see Cox et al. 1969).

Figures

Fig. 6. Bivalves from the Early Frasnian Goniatite Level (uppermost Szydłówek Beds) at Kostomłoty and Ściegnia, Holy Cross Mountains, Poland. A–F. Glyptohallicardia multicostata sp. nov. A. Holotype, GIUS 4−2290 Kos−20, in lateral (A1), posterior (A2), ventral (A3), and dorsal (A4) views. B, F. GIUS 4−2291 Kos−21/2 (B) and GIUS 4−2847 Wz−41a/1 (F) in lateral views. C, D. GIUS 4−2291 Kos−21/1 (C) and GIUS 4−2291 Kos−21/8 (D) in posterior views. E. GIUS 4−2291 Kos−21/6 in dorsal view. G–J. Glyptohallicardia aff. G. conversa (Clarke, 1904). G–I. GIUS 4−2577 Kos−44/2 (G), GIUS 4−2577 Kos−44/1 (H), and GIUS 4−2577 Kos−44/4 (I) in lateral views. J. GIUS 4−2577 Kos−44/3 in dorsal view. K. Glyptohallicardia cf. palmata (Goldfuss, 1837), GIUS 4−2296 Kos−26 in lateral view. L.?Metrocardia sp., GIUS 4−2295 Kos−25 in lateral view. M–O. Glyptohallicardia ferruginea (Holzapfel, 1895). M. GIUS 4−2293 Kos−23/1 in lateral view. N. GIUS 4−2293 Kos−23/2 in posterior view. O. GIUS 4−2293 Kos−23/3, fragment of valve with ornamentation visible. P, Q.?Cabricardium sp. P. GIUS 4−2581 Kos−48/1 in lateral view. Q. GIUS 4−2581 Kos−48/2 in lateral (Q1) and dorsal (Q2) views. R. Leptodesma sp., GIUS 4−2297 Kos−27 in lateral view.