Amalda mucronata
| Amalda mucronata | |
|---|---|
| |
| Shell of Amalda mucronata (specimen at the Natural History Museum, Rotterdam) | |
Scientific classification 
| |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Gastropoda |
| Subclass: | Caenogastropoda |
| Order: | Neogastropoda |
| Family: | Ancillariidae |
| Genus: | Amalda |
| Species: | A. mucronata
|
| Binomial name | |
| Amalda mucronata (G.B. Sowerby I, 1830)
| |
| Synonyms | |
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Amalda mucronata is a species of medium-sized sea snail, a marine gastropod mollusc in the family Ancillariidae.[1]
These snails live in the sandy subtidal near-shore environment where they eat bivalves. Fossil material of this species provides evidence of morphological stasis over 5 million years[2][3]
Shell description
[edit]The shell height is up to 61 mm, and the width is up to 27 mm.
(Original description) The shell is oblong and pale brown, with an acuminated spire thickly coated in enamel. The apex is pointed. The body whorl features a white-bordered band near its upper section, while a faintly impressed line ends in a small, blunt tooth at the lower edge of the outer lip.
Two bands are visible near the lower part of the body whorl, with a very indistinct groove marking the beginning of the columellar varix, which is narrow, whitish, and subtly striated. The aperture is somewhat acute at the top and notched at the bottom. The outer lip is slightly thickened at the edge, with a single small tooth near the base. The upper portion of the inner lip extends over the spire. [4]
Distribution
[edit]This marine species is endemic to and occurs off New Zealand.[5]
References
[edit]- ^ Gemmell, Michael R.; Trewick, Steven A.; Hills, Simon F. K.; Morgan-Richards, Mary (2019). "Phylogenetic topology and timing of New Zealand olive shells are consistent with punctuated equilibrium". Journal of Zoological Systematics and Evolutionary Research. 58 (1): 209–220. doi:10.1111/jzs.12342. ISSN 0947-5745.
- ^ Michaux, B (1989). "Morphological variation of species through time". Biological Journal of the Linnean Society. 38 (3): 239–255. doi:10.1111/j.1095-8312.1989.tb01577.x.
- ^ Gould, Stephen Jay (1991). "Opus 200". Natural History. 100 (8): 12–18.
- ^ Sowerby G.B. I (1830). Species Conchylirum or concise original descriptions and accompanied by figures of all the species of Recent shells, with their varieties. G.B. Sowerby, London.
This article incorporates text from this source, which is in the public domain.
- ^ Michaux, B. (1987). "An analysis of allozymic characters of four species of New Zealand Amalda (Gastropoda: Olividae: Ancillinae)". New Zealand Journal of Zoology. 14 (3): 359–366. doi:10.1080/03014223.1987.10423006. ISSN 0301-4223.
- Powell A W B, New Zealand Mollusca, William Collins Publishers Ltd, Auckland, New Zealand 1979 ISBN 0-00-216906-1
- Glen Pownall, New Zealand Shells and Shellfish, Seven Seas Publishing Pty Ltd, Wellington, New Zealand 1979 ISBN 0-85467-054-8
- Michaux, B. (1991). "The Evolution of the Ancillinae with Special Reference to New Zealand Tertiary and Recent Species of Amalda H. & A. Adams, 1853 (Gastropoda:Olividae:Ancillinae)". ENUS (The Japanese Journals of Malacology). 50 (2): 130–149.
- Spencer, H.G., Marshall, B.A. & Willan, R.C. (2009). Checklist of New Zealand living Mollusca. Pp 196-219. in: Gordon, D.P. (ed.) New Zealand inventory of biodiversity. Volume one. Kingdom Animalia: Radiata, Lophotrochozoa, Deuterostomia. Christchurch: Canterbury University Press.
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External links
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