Divarilima

Divarilima

Divarilima
Divarilima albicoma
Scientific classification Edit this classification
Kingdom: Animalia
Phylum: Mollusca
Class: Bivalvia
Order: Limida
Superfamily: Limoidea
Family: Limidae
Genus: Divarilima
Powell, 1958
Type species
Lima sydneyensis

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

Description

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]

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]

References

  1. ^ a b Divarilima A. W. B. Powell, 1958. Retrieved through: World Register of Marine Species on 2 October 2025.
  2. ^ a b Powell, A. W. B. (1958). "Mollusca of the Kermadec Islands: Part I". Records of the Auckland Institute and Museum. 5: 65–85. ISSN 0067-0464. JSTOR 42906092. Wikidata Q58676766.
  3. ^ Cox, L. R.; Hertlein, L. G. (1969). "Mollusca 6 (Bivalvia)". In Moore, R. C. (ed.). Treatise on invertebrate Paleontology. Boulder: Geological Society of America. p. 389. doi:10.17161/dt.v0i0.5590.
  4. ^ Beu, A.G.; Maxwell, P.A. (1990). "New Zealand Cenozoic Mollusca" (PDF). New Zealand Geological Survey Paleontological Bulletin. 58: 396. ISSN 0114-2283.
  5. ^ Kilburn, R. N. (1 December 1998). "The Limidae of South Africa and Mozambique (Mollusca: Bivalvia): genera Limaria, Limatula, Divarilima, Ctenoides and Fukama" (PDF). Annals of the Natal Museum. 39 (1): 203–247. hdl:10520/AJA03040798_266. ISSN 0304-0798. Wikidata Q94767090.
  6. ^ Divarilima aucklandensis (Laws, 1950) †. Retrieved through: World Register of Marine Species on 2 October 2025.

Further reading

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