Crommium, Cossmann, 1888

Islamoğğlu, Yeşşim, Dominio, Stefano & Kowalke, Thorsten, 2011, Early Eocene Caenogastropods (Mollusca, Gastropoda) from Haymana-Polatl Basin, Central Anatolia (Turkey): taxonomy and palaeoecology, Geodiversitas 33 (2), pp. 303-330 : 310-312

“ Crommium ” sp. 1 ( Fig. 5L, M )

MATERIAL EXAMINED. — 13 specimens,MTA-Y. İ.-2007 -12 to 15.

LOCALITY AND HORIZON. — Grey siltstone-mudstone, KIrkkavak Formation (Macunköy: sample G3,4).

DESCRIPTION

High and stepped conical spire, spire whorls slightly convex, are flattened and become more pronounced in the abapical part. The body whorl is slightly convex, with an ovate shape and an angular shoul- der, forming about ¾ of the shell height. Aperture elongated and slightly curved towards the base. Its apical angle is rather narrow between 83-86°, the range of LT/D1 is 1.14-1.32 (Appendix 1).

Figures

FIG. 5. — Caenogastropods (deposited in the repositories of the General Directorate of Mineral Research and Exploration, Ankara): A, B, N, “Ampullina” cf. vapincana (d’Orbigny, 1850); C, D, “Ampullina” cf. vulcani (Brongniart, 1823); E, F, “Ampullinid” indet.; G, Campanile giganteum (Lamarck, 1804); H-K, Cerithium puigcercosensis (Cossmann, 1897) n. comb.; L, M, “Crommium” sp. 1. Scale bars: 1 cm.