Melanoides sp.

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 : 322

? Melanoides sp. ( Fig. 7B )

MATERIAL EXAMINED. — One specimen deposited in NHMV (2008z0310/0003).

LOCALITY AND HORIZON. — Grey siltstone, KIrkkavak Formation (Macunköy: sample G1).

DESCRIPTION

Slightly fusiform shell, last whorl little less than half of the total; turriculated spire composed of more than 7 whorls, suture impressed. In the early teloconch spiral cords intersect axial cords forming 3 series of circular nodes each with 14 or 15 nodes. The nodes tend to merge one into the other, forming in the body whorl 14 or 15 axially coalescent elements. Last whorl gently convex, base more than twice higher than the whorl, with 6 spiral cords more pronounced in the middle part. Narrow and oblique aperture.

REMARKS

Melanoides vidali ( Cossmann, 1897) has similar size, shell shape and sculpture. However, it differs by the lack of a turriculated spire, the axial cords are always strongly developed than the spiral ones, and more sinuose in course with respect to M. vidali .

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.