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Taxon profile

species

Cellana grata (Gould, 1859)

kingdom Animalia - animals »  phylum Mollusca - mollusks »  class Gastropoda - gastropods »  family Nacellidae »  genus Cellana

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Description

Shell of moderate to fairly large size, 30-56 mm in length, ovate to rather narrowly ovate and moderately elevated, with both anterior and posterior slopes, slightly to conspicuously arched. Sculpture consisting of very numerous scaly to imbricately tuberculose radial ribs which are variable in development; Colour of exterior whitish to dull gray, maculated with reddish brown spots and dashes; interior bluish grey or buff, heavily radially maculated with intermittent dark-brown rays and spots, the spatula bright-chestnut in the middle, but deepening to a dark-brown clear-cut outer edge. Length: 30-56 mm; Width 23-47 mm; Height: 11,5 – 27 mm
Source: Powell, 1973. The Patellid limpets of the world (Patellidae).

Interchangeable taxa

Gould's grata is easily recognised by its rather narrowly ovate outline, high profile, and prominent sculpture of numerous scaly to tubercled radial ribs. The exterior of the shell is greyish, with dashes and speckles in light to dark reddish-brown. These intermittent radial maculations show strongly in the interior, which also has a clear cut spatula of reddish chestnut, deepening to dark-brown at the edges.

Distribution

Japan and Korea.

Taxonomy

This common Japanese limpet has often appeared in the literature under the name of eucosmia Pilsbry, 1891, which name was first applied to a Red Sea shell, and then later misapplied by Pilsbry, 1895, exclusively to a Japanese Cellana. This latter Cellana is a synonym of stearnsii Pilsbry, 1891, which is a more strongly sculptured form of the false 'eucosmia' of Pilsbry, 1895. However, stearnsii also, must be relegated to the synonymy of grata Gould, 1859, which becomes the valid name for this Japanese shell.
Author: Jan Delsing

Included taxa

Number of records: 2

subspecies Cellana grata grata (Gould, 1859)
subspecies Cellana grata stearnsi H.A. Pilsbry, 1891

Cellana grata stearnsi


Links and literature

EN Galli C.: WMSDB - Wolrdwide Mollusc Species Data Base July 10, 2013 [http://www.bagniliggia.it/WMSD/WMSDhome....] [as Cellana grata (Gould, 1859)]
Data retrieved on: 2 May 2017

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