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Taxon profile

species

White-based Dove-shell
Mitrella tenuis Gaskoin, 1852

kingdom Animalia - animals »  phylum Mollusca - mollusks »  class Gastropoda - gastropods »  order Neogastropoda »  family Columbellidae - Dove Shells »  genus Mitrella

Images

Mitrella tenuis - White-based Dove-shell

Author: Beechey

Mitrella tenuis - White-based Dove-shell

Author: Beechey

Taxon in country check-lists*

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Description

Shell average width for the genus, spire straight sided, whorls rounded, aperture about 1/3 of shell length; protoconch of 1¼ smooth whorls. Spiral sculpture of cords on base; axial sculpture absent. Outer lip sinuous in profile, with shallow sinus; lip thickened externally; thickened internally, with 5-8 denticles. Columella callus sharp-edged in mature shells, axial ridge inside edge bearing several denticles. Siphonal canal very short. Colour variable but several predominant patterns; (a) dark brown with white base (b) axial brown flames or spiral band of brown patches (c) white spots in quincunx (d) any combination of these patterns; base usually white. Interior white or fawn. Periostracum smooth.
Size: Up to 16 mm in length.
Beechey, Seashells of New South Wales.

Interchangeable taxa

This species is identified by its moderate size, rounded whorls and specific colour patterns. It usually has a white base, but this is a character sometimes seen in other species, particularly M. semiconvexa. It is close to M. semiconvexa but smaller, and many specimens are impossible to positively separate. It is larger than M. leucostoma and of similar shape, and again positive separation is not always possible.
Beechey, Seashells of New South Wales.

Distribution

Endemic to Australia; Jervis Bay, NSW, around southern Australia to south-western WA. Also some records of doubtful identification from Sydney.
Habitat: Intertidal on rocky shores.
Beechey, Seashells of New South Wales.
Author: Jan Delsing

Similar species

Mitrella leucostoma Gaskoin, 1852 - White-mouthed Dove-shell

Links and literature

EN Galli C.: WMSDB - Wolrdwide Mollusc Species Data Base July 10, 2013 [http://www.bagniliggia.it/WMSD/WMSDhome....] [as Mitrella tenuis (Gaskoin, 1852)]
Data retrieved on: 23 November 2013

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