Vexillum malcolmense

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Vexillum malcolmense
Vexillum malcolmense 001.jpg
Drawing of a shell of Vexillum malcolmense (holotype)
Scientific classification OOjs UI icon edit-ltr.svg
Domain: Eukaryota
Kingdom: Animalia
Phylum: Mollusca
Class: Gastropoda
Subclass: Caenogastropoda
Order: Neogastropoda
Superfamily: Turbinelloidea
Family: Costellariidae
Genus: Vexillum
Species:
V. malcolmense
Binomial name
Vexillum malcolmense
(Melvill & Standen, 1901)
Synonyms [1]
  • Mitra (Costellaria) malcolmensisMelvill & Standen, 1901 (basionym)
  • Mitra (Costellaria) malcolmensis var. immaculataMelvill & Standen, 1901
  • Mitra malcolmensisMelvill & Standen, 1901
  • Vexillum (Costellaria) malcolmense(Melvill & Standen, 1901)

Vexillum malcolmense is a species of sea snail, a marine gastropod mollusk, in the family Costellariidae, the ribbed miters. [1]

Contents

Description

The length of the shell attains 9.2 mm, its diameter 3 mm.

The shell is variable both in sculpture and colouring, though not so in form. This species differs in the number of longitudinal ribs, some specimens having half as many again on the body whorl as have others. The rufous banding is also entirely absent in specimens dredged from any depth. Occasionally, too, examples with the body-whorl almost wholly rufous brown turn up. Perhaps the nearest ally to this is Vexillum scitulum (A. Adams, 1853); the body-whorl is not so attenuate basally.

The type is twice banded with rufous brown spirally at the interstices between the ribs. The variety Mitra (Costellaria) malcolmensis var. immaculataMelvill & Standen, 1901, a white or pale yellow almost unhanded variety, is found at 10-50 fathoms. This is probably the shell mentioned (Journ. As. Soc. Bengal, xliv. pt. 2, p. 106) by Messrs. G. & H. Nevill as " a new species closely allied to Turricula (Thala) casta H. Ad., which has been dredged rather abundantly by Mr. W. T. Blanford in the Gulf of Oman." T. casta H. Ad. is a synonym of M. (Turricula) hastata Sowb., and which also might be mentioned as an ally of M. malcolmensis. [2]

Distribution

This marine species occurs in the Persian Gulf and the Gulf of Oman; also off Mozambique, the Philippines and Indonesia.

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References


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