Cylichna cf. sublaevis (d’Orbigny, 1852)

Thivaiou, Danae, Harzhauser, Mathias & Koskeridou, Efterpi, 2019, Early Miocene Gastropods from the Felli Section (Proto-Mediterranean Sea NW Greece), Geodiversitas 41 (8), pp. 323-366 : 349

Cylichna cf. sublaevis (d’Orbigny, 1852)

cf. Bulla sublaevis d’Orbigny, 1852: 95 , no 1772.

cf. Bulla laevis – Grateloup 1837: 400, pl. 3, figs 35, 36 (non Defrance).

cf. Bullinella (Cylichnina) sublaevis – Peyrot 1932: 187, no. 1396, pl. 13, figs 31, 33.

cf. Cylichna sublaevis – Lozouet et al. 2001: 81 , pl. 37, figs 2a, b.

MATERIAL EXAMINED. — Sample F11: AMPG ( IV) 2550-2553 (four specimens).

DIMENSIONS. — Maximum height: 2.20 mm.

DISTRIBUTION. — Early Miocene. NE Atlantic: France (Aquitaine Basin) (d’Orbigny 1852; Peyrot 1932; Lozouet et al. 2001); Proto- Mediterranean Sea: Greece (this paper).

REMARKS

A species of Cylichna was recovered, whose morphology bears many similarities with Cylichna sublaevis (d’Orbigny, 1852) despite the poor preservation. The shell is subcylindrical, smooth, with sculpture consisting of inconspicuous growth lines; adapically the outer lip rises above the apex and forms a narrow apical perforation. The aperture is partially broken in all specimens; the inner lip is small and bears a small fold. No colour pattern can be observed in the Greek specimens, although it is mentioned by Peyrot (1932) that the species had axial zig-zag-shaped lines. The specimens from Greece seem to be smaller than those mentioned by Peyrot (1932) (5.5 mm) but this is most probably due to the preservation of these fragile shells in the present material, with larger size specimens being very fragmented.