Exomilopsis
| Exomilopsis | |
|---|---|
| Holotype of E. hipkinsi | |
| Scientific 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.[1] 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.[2]
The genus' tall, conical protoconchs are more similar to barrow forms of columbellids.[3]
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.[2] Boyer et al. (2022) suspect that the genus is likely a synonym of Gatliffena.[4]
Distribution
Exomilopsis is found in the temperate waters of south of Australia and around New Zealand,[2] and is found in Miocene fossils in Victoria, Australia.[3]
Species
Species within the genus Exomilopsis include:[1]
- Exomilopsis hipkinsi A. W. B. Powell, 1964
- Exomilopsis spica (Hedley, 1907)
References
- ^ a b Exomilopsis A. W. B. Powell, 1964. Retrieved through: World Register of Marine Species on 2 October 2025.
- ^ a b c Powell, A. W. B. (1964). "New Zealand Molluscan Systematics with Descriptions of New Species: Part 4". Records of the Auckland Institute and Museum. 6: 11–20. ISSN 0067-0464. JSTOR 42906110. Wikidata Q58676792.
- ^ a b Powell, A.W.B. (1979). New Zealand Mollusca: Marine, Land and Freshwater Shells. Auckland: Collins. p. 190-191. ISBN 0002169061.
- ^ 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
- Wilson, Barry (1994). Australian Marine Shells, Vol. 2. (Neogastropods). Kallaroo, Western Australia: Odyssey Publishing. ISBN 9780646152271.