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Taxon profile

species

Monoplex exaratus L. A. Reeve, 1844

kingdom Animalia - animals »  phylum Mollusca - mollusks »  class Gastropoda - gastropods »  order Littorinimorpha »  family Cymatiidae »  genus Monoplex

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Description

Shell rather small, whorls flat-shouldered, canal moderately long. Sculpture consisting of 2 prominent cinguli on the spire-whorls at and below the shoulder, with a fine spiral thread in the groove, crossed by distant radiate ribs, about 8 on a whorl, the points of intersection raised into rounded nodules ; shoulder with 3 fine spiral threads ; body-whorl with 5 prominent cinguli, and a number of smaller ones upon the neck ; there are 2 high and rounded varices. Colour whitish, variegated or banded with brown, or brown with a white median band ; aperture white. Epidermis thin, horny, spirally striated. Spire conoidal, gradate, about the same height as the aperture. Protoconch of 4,5 whorls, semitransparent, smooth. Whorls about 9, slowly
increasing, strongly keeled and flatly shouldered ; base excavated around the neck. Suture deep. Aperture slightly oblique, indistinctly channelled above, produced below into a moderately long, straight, and open canal. Outer lip with a strong outer varix, inside denticulate and distantly lirate. Columella vertical, nearly straight, wrinkled. Inner lip spreading as a thin white callus over the parietal wall and the columella, narrowly drawn out towards the margin of the canal.
Diameter, 26 mm. ; height, 45 mm. Animal unknown.
Type in the British Museum.
Hab.—Tauranga. The type is from Australia.
Suter, H. 1913. Manual of the New Zealand Mollusca.
Author: Jan Delsing

Included taxa

Number of records: 1

subspecies Monoplex exaratus kiiensis (G.B. Sowerby III, 1915)

Monoplex exaratus kiiensis


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