Exomilopsis

Exomilopsis
Holotype of E. hipkinsi
Scientific classification Edit this classification
Kingdom: Animalia
Phylum: Mollusca
Class: Gastropoda
Subclass: Caenogastropoda
Order: Neogastropoda
Superfamily: Buccinoidea
Family: Columbellidae
Genus: Exomilopsis
A. W. B. Powell, 1964
Type species
Mangelia spica

Exomilopsis is a genus of minute gastropod molluscs belonging to the family Columbellidae. Both species are found in Oceania.

Description

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

The new genus Exomulopsis is characterised by its strong superficial resemblance to the Turrid genus Exomilus, i.e. attenuate spire, sagged, low keeled whorls, crossed by axial folds, and a narrow rectangular aperture, but without an anal sinus. The genus Retizafra, to which spica and its allies have most in common, has a fewer whorled more broadly conic protoconch and the shell is of more conventional fusiform shape, the sculpture being axial reticulated by spiral cords.

The genus' tall, conical protoconchs are more similar to barrow forms of columbellids.

Taxonomy

The genus was first described by A. W. B. Powell in 1964, who named Mangelia spica as the type species, and also described a new species in the genus, E. hipkinsi. Boyer et al. (2022) suspect that the genus is likely a synonym of Gatliffena.

Distribution

Exomilopsis is found in the temperate waters of south of Australia and around New Zealand, and is found in Miocene fossils in Victoria, Australia.

Species

Species within the genus Exomilopsis include:

References

  1. 1 2 Exomilopsis A. W. B. Powell, 1964. Retrieved through: World Register of Marine Species on 2 October 2025.
  2. 1 2 3 Powell, Arthur William Baden (1964). "New Zealand Molluscan Systematics with Descriptions of New Species: Part 4". Records of the Auckland Institute and Museum. 6: 11–20. JSTOR 42906110. Wikidata Q58676792.
  3. 1 2 Powell, A.W.B. (1979). New Zealand Mollusca: Marine, Land and Freshwater Shells. Auckland: Collins. p. 190-191. ISBN 0002169061.
  4. ↑ Boyer, Franck; Pelorce, Jacques; Gori, Sandro (2022). "Révision des Columbellidae de l'île de Masirah, Oman. Partie 1 : genres Smithena gen. nov., Anachis H. Adams & A. Adams, 1853, Zafra A. Adams, 1860 et Parvanachis Radwin, 1968". Novapex (in French). 23 (3): 87-110.

Further reading