Acteon cf. pinguis 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 : 346

publication ID

https://doi.org/ 10.5252/geodiversitas2019v41a8

publication LSID

urn:lsid:zoobank.org:pub:A2760279-BE3E-4730-9688-9AB777F3A357

DOI

https://doi.org/10.5281/zenodo.3705656

persistent identifier

https://treatment.plazi.org/id/65316246-1546-5265-FE92-FA05FA43FC82

treatment provided by

Valdenar

scientific name

Acteon cf. pinguis d’Orbigny, 1852
status

 

Acteon cf. pinguis d’Orbigny, 1852

(Fig. 7 View FIG B1, B2)

cf. Acteon pinguis d’Orbigny, 1852 : no. 521, 36. — Peyrot 1932: 157, no. 1376, pl. 11, figs 55-57, pl. 14, figs 12, 13. — Lozouet et al. 2001: 79. — Harzhauser 2002: 125, pl. 12, fig. 7.

MATERIAL EXAMINED. — Sample F10: AMPG ( IV) 2479-2481 (three specimen); sample F11: AMPG ( IV) 2482, 2483 (two specimens); sample F12: AMPG ( IV) 2484-2487 (four specimens) .

DIMENSIONS. — Maximum height: 1.85 mm.

DISTRIBUTION. — Early Miocene. Aquitanian. NE Atlantic: France (Aquitaine Basin) ( Peyrot 1932; Lozouet et al. 2001); Proto-Mediterranean: Greece (this paper). — Burdigalian. NE Atlantic: France (Aquitaine Basin) ( Peyrot 1932); Paratethys: Austria (Harzhauser 2002).

DESCRIPTION

Juvenile and incomplete specimens with intorted smooth protoconch.Apical angle of 55°.Two teleoconch whorls, sculpture typi- cal with regularly-spaced pitted grooves, suture deeply impressed; aperture tear-drop shaped, no umbilicus, outer lip regularly convex.

REMARKS

A single species of ‘ Acteon ’ has been found, represented mainly by juveniles. The sculpture, apical angle coincide with those of A. pinguis but the juvenile and incomplete specimens does not allow a clear identification. Variation in sculpture consists of the grooves that bear less prominent pits and have a smoother aspect abapically. The last whorl of the specimens observed has slightly deeper grooves which could possibly be a feature dominating the sculpture of later whorls.

The shape of the shell and the convexity of the whorls are reminiscent of Acteon semistriatus (Férussac, 1822) . The sculpture and overall morphology of the recovered specimens is most similar to A. pinguis d’Orbigny, 1852 . Nevertheless, the protoconch seems slightly wider and less inflated, which could be due to intraspecific variability. Moreover, specimens recovered show various traces of predation from molluscs and possibly decapods.

Kingdom

Animalia

Phylum

Mollusca

Class

Gastropoda

Family

Acteonidae

Genus

Acteon

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