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Taxon profile

species

Epitonium turtonis (Turton, 1819)

kingdom Animalia - animals »  phylum Mollusca - mollusks »  class Gastropoda - gastropods »  family Epitoniidae - Wentletraps »  genus Epitonium

Scientific synonyms

Turbo turtonis Turton, 1819
Clathrus turtonis (Turton, 1819)
Epitonium turtoni (Turton, 1819)
Scalaria elegans Risso, 1826
Epitonium turtonae karpathense Nordsieck, 1969
Scalaria planicosta Bivona Ant., 1832
Fusicoscala planicosta (Bivona, 1832)
Scalaria tenuicosta var. strigata Pallary, 1938
Epitonium tenuicosta Michaud, 1829
Scalaria tenuicostata Michaud, 1829

Images

Epitonium turtonis

Author: Shellauction

Epitonium turtonis

Author: Kaicher, S.

Epitonium turtonis

Author: Fretter & Graham

Epitonium turtonis

Author: Fretter & Graham

Taxon in country check-lists*

* List of countries might not be complete

Description

Shell solid, bright, stretched, whorls convex, suture evident but not deep. Sculpture made by axial ribs (about 12 on the last whorl) roundish and in different thickness, joining among them near suture, sometimes making one spined protuberance too.There are often present varices. Among the interspaces of ribs there can be noted fine spiral striae. Aperture roundish in form, peristome continuous, that thickening, makes a columellar callum (dark brown in colour) at the crossing with the ribs, closing the umbilicus as a matter of fact. Ground colour dark brown either with bands or streaks lighter, but there can be found light specimens with darker bands too. Protoconch has about 4 whorls of spiral smooth. The adult specimens average measures are around 30-35 mm in height.
Scaperrotta, M. ,Bartolini, S. & Bogi, C., 2009. Accrescimenti, Vol. 2. Stages of growth of marine molluscs of the Mediterranean Sea. (secondary description)
Shell. Differing in details from that of E. clathrus though similar in general appearance. The whorls (15 or so) meet at moderately deep sutures; the spire (apical angle c. 18°) is more nearly straight-sided; there are 12-15 costae on the last whorl and 13-16 on those of the spire, a few thickened as varices; the spire appears smoother than that of clathrus because the costae are flat, deeply undercut on the side which faces up the spire and expanded at their adapical ends into slightly ridged, flattened areas which are applied to the surface of the upper whorl mainly between costae (Fig.278); the extensions are long enough to reach the next adapertural costa and so cover the whole of the intervening sutural area; the costae tend to alternate from whorl to whorl so that the shell lacks the long spiral ridges of the other species; the spaces between costae show definite spiral striae; there is a slight rather irregularly folded ridge alongside the columella, half obscured by eversion of the inner lip.
Aperture. Much as in clathrus but the outer lip is more pointedly everted basally and the inner lip more everted alongside the columella.
Colour. As in clathrus, though often yellower or browner.
Size. 40X12mm. Last whorl = 40% of total shell height; aperture = 25% of the shell height.
Animal. As in clathrus.
Colour, Much as in clathrus but generally darker.
Fretter, V. and Graham, A., 1982. The prosobranch molluscs of Britain and Denmark. Part 7 - Heterogastropoda (Cerithiopcea, Triforacea, Epitoniacae, Eulimacea)

Distribution

Common all over the Mediterranean.
Scaperrotta, M. ,Bartolini, S. & Bogi, C., 2009. Accrescimenti, Vol. 2. Stages of growth of marine molluscs of the Mediterranean Sea. (secondary description)
Geographical distribution. Mediterranean, thence N. along the west coast of Europe to Norway. It occurs in the Kattegat.
Habitat, food. As for clathrus; recorded 5-20 m deep.
Fretter, V. and Graham, A., 1982. The prosobranch molluscs of Britain and Denmark. Part 7 - Heterogastropoda (Cerithiopcea, Triforacea, Epitoniacae, Eulimacea)
Author: Jan Delsing

Links and literature

EN Galli C.: WMSDB - Wolrdwide Mollusc Species Data Base July 10, 2013 [http://www.bagniliggia.it/WMSD/WMSDhome....] [as Epitonium turtonis Turton, 1819]
Data retrieved on: 23 November 2013
IT Repetto G., Orlando F. & Arduino G. (2005): Conchiglie del Mediterraneo, Amici del Museo "Federico Eusebio", Alba, Italy [as Epitonium turtoni (Turton, 1819)]
EN Petović S., Gvozdenović S., Ikica Z. (2017): An Annotated Checklist of the Marine Molluscs of the South Adriatic Sea (Montenegro) and a Comparison with Those of Neighbouring Areas, Turkish Journal of Fisheries and Aquatic Sciences 17: 921-934 [as Epitonium turtonis (Turton, 1819)]
SP Prats Pi, L. (2002): Gastròpodes marins de la cala de Binissafúller, Menorca (Illes Balears), Spira, 1(2): 21-24 [as Epitonium turtoni (Turton, 1819)]
SP Tarruella Ruestes, A. (2002): Moluscos marinos de Cap Ras y Llançà (Girona, NE de la península Ibérica), Spira, 1(2): 1-14 [as Epitonium turtoni (Turton, 1819)]

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