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Taxon profile

species

Gyroscala xenicima (Melvill & Standen, 1903)

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

Scientific synonyms

Epitonium xenicimum J. C. Melvill & R. Standen, 1903
Epitonium xenicima Melvill & Standen, 1903

Images

Gyroscala xenicima

Author: Tunnell et al.

Gyroscala xenicima

Author: Kaicher, S.

Gyroscala xenicima

Author: Massemin, D. et al

Gyroscala xenicima

Author: Bosch et al.

Gyroscala xenicima

Author: Weil et al.

Taxon in country check-lists*

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Description

Distribution: Texas; Colombia; Surinam. Size: 23 mm.
Description: Color grayish-tan, protoconch yellowish-brown, first postnuclear whorls grayish, latter whorls with brown bands above and below sutures, brown band at basal carinae bleeds into basal area; shape elongate-conic; sculpture of raised, flattened, wavy, nondiverging axial ridges; inner spaces between axial ridges smooth; protoconch smooth; aperture subcircular to ovate, somewhat flared anteriorly. Habitat: Shells found in beach drift. Depth range 0 to 25 m (82 ft). Remarks: Rare species. See Clench and Turner (1952); Garcia (2006). Synonym: E.turnerae Altena, 1971.
Tunnell, J.W. , Andrews, J. , Barrera, N.C. & Moretzsohn, F., 2010. Encyclopedia of Texas seashells.
14mm. Thin, high spired with pointed, smooth, glossy protoconch of about 3 whorls. Gently sloping, smooth, glossy spire whorls bear irregular widely spaced, curved or sinuous, very low ribs (about 13-16 on last whorl) which may join at sutures. Rounded rib encircles base and continues onto spire sutures. Faint spiral scratches between ribs. Aperture elongate; peristome thin. No umbilicus. Livid brown with paler axial streaks and greyish ribs. Habitat: deep water and offshore. Distribution: Gulf of Oman
Bosch, D.T., Dance, S.P., Moolenbeek, R.G. en Oliver, G., 1995. Seashells of Eastern Arabia.
As Amaea turnerae (Altena, 1971):
While this species was described from Surinam where it occurs intertidally, it was recently found off of southeastern Florida by SCUBA divers, thereby extending the known range of this species. It attains a maximum size of 12mm. The whorls are light brown with a white band around the center of the later whorls. Adult specimens have approximately 8 whorls with 12 low costae per whorl. There are fine spiral threads between the costae. A thin basal ridge is present, the outer lip is thin and the columella white.
Weil, A. , Brown, L. & Neville, B, 1999. The Wentletrap book - Guide to the Recent Epitoniidae of the world.
Amaea (Acrilla) xenicima (Melvill & Standen, 1903) (Fig. 232) This Indo-Pacific species is found from Hawaii east through the Indian Ocean to South Africa, from shallow water to offshore. It is generally whitish and reaches a maximum size of approximately 18mm. There are approximately 10-12 con- vex whorls with 10-13 widely spaced costae per whorl. Fine spiral threads can be seen in the intervals between the costae. The basal cord is well defined, the outer lip is thin and the columella white.
Weil, A., Brown, L. & Neville. 1999. The Wentletrap book: Guide to the Recent Epitoniidae of the world
Author: Jan Delsing

Links and literature

http://seashellsofnsw.org.au/Epitoniidae...
DESCRIPTION & PICTURE(S) SHELLS NEW SOUTH WALES - AUSTRALIA

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