Ampullina, Bowdich, 1822

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

“ Ampullina ” cf. sireli ( Okan & Hoşgör, 2008) ( Fig. 6N, O )

Globularia sireli Okan & Hoşgör, 2008: 10 , pl. 2h-m.

MATERIAL EXAMINED. — Two specimens, MTA- Y. İ.-2007 -1.

LOCALITY AND HORIZON. — Grey siltstone, KIrkkavak Formation (Macunköy: samples G3).

PALAEOGEOGRAPHIC DISTRIBUTION. — Macunköy (PolatlI, Central Turkey): Late Thanetian-Early Ilerdian ( Okan & Hoşgör 2008: based on the former age interpretation of SBZ5-6 biozones given by Sirel 1975 and Serra-Kiel et al. 1998).

REDESCRIPTION

Shell is globular, wide, spire is rather short, spire whorls are slightly rounded, stepped, separated by deep suture lines. Last whorl with an angular shoul- der is globular, strongly wide, ovate towards the base. Aperture is narrow and ovate.The rate of the width to the height (LT/HT) is approximately 0.92 and apex angle is between 105-110° (Appendix 1).

REMARKS

This species is similar to “ Globularia sireli ” which was described from the Macunköy section of the KIrkkavak Formation by Okan & Hoşgör (2008: 10, pl. 2h-m). They assigned their specimens to Globularia Swainson, 1840 . However, the figured specimens differ from Globularia in having egg-shaped shells comprising elevated and stepped whorls, broad callus, large body whorl and half-moon-shaped ovate aperture and more likely fit in the genus Ampullina . The species is distinguished from “ Ampullina ” cf. vulcani and “ Ampullina ” cf. vapincana by a wider and more stepped last whorl.

Figures

FIG. 6. — Caenogastropods (deposited in the repositories of the General Directorate of Mineral Research and Exploration, Ankara): A, Cerithium puigcercosensis (Cossmann,1897) n. comb.;B-F, Vicinocerithium cf.subacutum (d’Orbigny,1850); G, S, Bellatara ankaraensis n. sp., holotype;H, I, Tympanotonos turris (Deshayes,1833); J, Cerithium cf.anguloseptum Rauff,1884; K-M, Gantechinobathra vulcani (Brongniart, 1823); P-R, “Crommium” sp. 2. Scale bars: 1 cm.