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Taxon profile

species

Alexania floridana H. A. Pilsbry, 1945

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

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Alexania floridana

Author: Tunnell et al.

Alexania floridana

Author: Weil et al.

Taxon in country check-lists*

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Description

Distribution: North Carolina to Florida, Texas. Size: 6 mm.
Description: Color tannish-brown, body whorl with a wide brown band extending from below the suture to above base of shell with splotches of blackish-brown pigmentation, area above band and at base of body whorl a lighter shade of tan, protoconch whitish with darker postnuclear whorls; shape globose, conic; sculpture smooth except for microscopic axial growth lines; suture deep, almost channeled; protoconch acuminate, abrupt; aperture broadly ovate to teardrop shaped. Habitat: Intertidal on shell or rock beaches at depths from 0 to 21 m (69 ft). Remarks: Placement of Alexania in the Epitoniidae appears to be correct because of similar radula and egg casing features. See Pilsbry (1945); Robertson (1997). Synonym: Stenacme floridana Pilsbry, 1945.
Tunnell, J.W. , Andrews, J. , Barrera, N.C. & Moretzsohn, F., 2010. Encyclopedia of Texas seashells.
While A. floridana is known from Florida, it may be more widely distributed and should be looked for from North Carolina to Texas. The shell attains a maximum size of 6mm and occurs intertidally with sea anemones. It is tan, with a pale line below the suture. The base of the shell is white. The aperture is very large relative to the size of the shell. There are 4 or more rounded whorls with deep sutures. The umbilicus is slit-like. The shell is fragile.
Weil, A. , Brown, L. & Neville, B, 1999. The Wentletrap book - Guide to the Recent Epitoniidae of the world.
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 Alexania floridana Pilsbry, 1945]
Data retrieved on: 23 November 2013

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