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Divarilima

Genus of bivalves From Wikipedia, the free encyclopedia

Divarilima
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Divarilima is a genus of marine bivalve molluscs in the family Limidae, the file shells or file clams.[1]

Quick facts Scientific classification, Type species ...
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Description

Thumb
Illustration of D. albicoma by William Healey Dall (1902)

In the original description, Powell described the genus as below:

It is a miniature Lima with a Ctenoides sculptural pattern of divaricating threads. It resembles the typical species except that a mature stage of arrested growth is reached at a small size, corresponding with the early post-larval stages in Lima typical.[2]

Members of the genus are small, trigonally ovate, strongly inequilateral, and have sharp. backward-pointing umbones. The anterodorsal outline almost straight, extended, coinciding with well-marked a umbonal ridge which borders a concave lunule.[3]

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Taxonomy

The genus was first described by A. W. B. Powell in 1958, who named Lima sydneyensis as the type species of the genus.[2] The genus is in the family Limidae.[4]

Distribution

Divarilima is found in oceans across the globe, including waters near Japan, the western Atlantic, South Africa, Australia and New Zealand.[5]

Species

Species within the genus Divarilima include:[1]

  • Divarilima abscisa (Barnard, 1964)
  • Divarilima albicoma (Dall, 1886)
  • Divarilima aucklandensis (Laws, 1950)[6]
  • Divarilima elegans Hayami & Kase, 1993
  • Divarilima handini J. Gibson-Smith & W. Gibson-Smith, 1982
  • Divarilima iwaotakii (T. Habe, 1961)
  • Divarilima sydneyensis (Hedley, 1904)

References

Further reading

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