Cerithium puigcercosensis ( Cossmann, 1898 ) Islamoğğlu & Dominio & Kowalke, 2011

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 : 314

Cerithium puigcercosensis ( Cossmann, 1898) n. comb. ( Figs 5 H-K; 6A)

Batillaria puigcercosensis Cossmann, 1898: 19 , pl. 8, figs 1-4. — Cossmann 1906: 134.

MATERIAL EXAMINED.— 75specimens,MTA-Y. İ.-2007 -24 to 27. Three specimens in the NHMV (2008z0310/0013).

LOCALITY AND HORIZON. — Grey siltstone, KIrkkavak Formation (Macunköy: sample G2, G3, G4).

PALAEOGEOGRAPHIC DISTRIBUTION. — Pyrenees ( Spain): Early Ypresian (Early Eocene) ( Dominici & Kowalke 2007).

DESCRIPTION

Shell is narrow conical, turriculate, medium-sized. Spire consists of up to 6 stepped whorls separated by a deep suture. Each whorl is characterized by wide-spaced prominent axial ribs crossed by four spiral threads. The intersections bear marked nodes where the spiral cords intersect the axial ribs. The first row of nodes is the biggest and projecting one, whereas the subsequent series become smaller towards the adapical part of the whorl. Base ornamented by seven rounded spiral cords. The aperture is siphonostomate, with elongated oval shape and deeply-incised siphonal canal.

REMARKS

This species differs from Batillaria by lacking rounded whorls and only subordinated spiral sculpture, which is always strongly developed in Cerithium spp.

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.