Lunulacardiidae Fischer, 1887

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 Lunulacardiidae Fischer, 1887

? Metrocardia sp. ( Fig. 6L ).—A single pyritised internal mould with poorly preserved dorsal portion has been studied. The present specimen is characterised by a dominance of radial ornamentation which consists of delicate furrows crossed by weaker commarginal lines. The subcircular shell shape suggests it belongs to Metrocardia ; however, the poorly preserved dorsal portion of the shell with lunule makes that the identification is imprecise. Metrocardia described by Křiž (2004) come from sediments of Early Franian and Early Famennian age.

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.