Haustator granulosa ( Deshayes, 1824 )

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 : 322-323

Haustator granulosa ( Deshayes, 1824) ( Fig. 7I )

Turritella granulosa Deshayes, 1824: 225 , pl. 37, figs 1, 2. — Cossman 1888: 301, fasc. 3.

Turritella (Haustator) granulosa – Mészáros 1957: 124, pl. 27, figs 3, 3a.

MATERIAL EXAMINED. — One specimen hosted in Ankara ( MTA-Y. İ.-2007 -PolatlI-59).

LOCALITY AND HORIZON. — Grey siltstone, KIrkkavak formation (Macunköy: sample G2).

PALAEOGEOGRAPHIC DISTRIBUTION. — Paris Basin ( France): Middle-Late Eocene ( Cossmann 1888); Transylvania basin ( Romania): Late Eocene ( Mészáros 1957).

DESCRIPTION

Shell is small, narrow, turriculate. The whorls are almost flat, composed of fine, frequent spiral threads (up to ten). The spiral ribs consist of numerous small and very close nodes. The suture line is weak. The last whorl has an angular base with small and quadrangular aperture.

REMARKS

The species is the first report of Haustator from Early Ypresian deposits and the oldest (but see Allmon 1996 for a more prudent use of supraspecific names). Haustator granulosa differs from Turritella velaini Vasseur, 1881 (Loire basin, France; Early Eocene) ( Cossmann 1899: t. 2, fasc. 1, 317, pl. 23, figs 1-3) by its more flat whorls and not having a prominent, sharp spiral rib close to the suture line.Another similar species, Turritella (Haustator) custugensis ( Doncieux, 1908) , has fine keel-like spiral threads.

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.