Terebralia sp. 2

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 : 318

Terebralia sp. 2 ( Fig. 7D )

MATERIAL EXAMINED. — One specimen deposited in the NHMV (2008z0310/0005).

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

DESCRIPTION

Medium-sized, turreted-conical shell, teleoconch with more than six whorls, body whorl almost as long as the spiral whorl, impressed sutures. Weak spiral and axial sculpture, details unclear due to bad preservation. Oval and oblique aperture attached to body whorl, short and narrow anterior canal, inner lip smooth and twisted, thinner than the outer lip.

REMARKS

Terebralia bonellii is characterized by a wider and flared aperture separated from the body whorl and a larger anterior canal. Terebralia sp. 1 from Macunköy differs in having a less impressed suture and a pronounced ornamentation, although this last character is here determined with uncertainty due to bad preservation.Turkish Terebralia spp. allow to extend the record of the genus to the early Eocene, previous reports being doubtful ( Reid et al. 2008).

Figures

FIG. 7. — Caenogastropods (deposited in the repositories of the Natural History Museum of Vienna and in the General Directorate of Mineral Research and Exploration, Ankara): A, Tympanotonos sp.; B,?Melanoides sp.; C, Terebralia sp. 1; D, Terebralia sp. 2; E, Vicinocerithium seni n. sp. (paratype-Vienna museum); F, Vicinocerithium seni n. sp. (paratype-MTA, Ankara); G, Vicinocerithium seni n. sp. (holotype-MTA, Ankara); H, “Cerithiid” indet.; I, Haustator granulosa (Deshayes, 1824); J, Haustator sp.; A-D, G, H, NHMV; E, F, I, J, MTA. Scale bars: 1 cm.