Selastele retiarium, common name the netted top shell, is a species of sea snail, a marine gastropod mollusc in the family Calliostomatidae.[1]
| Selastele retiarium | |
|---|---|
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| Original image of a shell of Selastele retiarium | |
Scientific classification 
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| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Gastropoda |
| Subclass: | Vetigastropoda |
| Order: | Trochida |
| Superfamily: | Trochoidea |
| Family: | Calliostomatidae |
| Genus: | Selastele |
| Species: | S. retiarium
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| Binomial name | |
| Selastele retiarium (Hedley & May, 1908)
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| Synonyms[1] | |
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Calliostoma retiarium Hedley & May, 1908 (original description) | |
Description
edit(Original description by Hedley & May) The height of the shell attains 7 mm. The small, subperforate shell has a conical shape with sharply keeled periphery, overlapping spire whorls and a flat base. Its colour and number of whorls are uncertain, the latter exceeding six.
Sculpture: small spiral threads parted by wider interstices amount to seven on the penultimate, and to twenty on the body whorl. Of these a double row compose the peripheral keel. On either side of the keel the interstices are wider than usual. The radials are irregular oblique wave-like folds, twenty-two on the body whorl, which raise beads on the keel rows, and there cease abruptly. On the base incipient radials bead the inner spirals.
The oblique aperture is trapezoidal. The simple outer lip is sharply angled by the periphery. The columella insertion is a little reflected over the minute umbilicus.[2]
Distribution
editThis marine species occurs off South Australia, Victoria and Tasmania at depths between 170 m and 180 m.
References
edit- ^ a b Selastele retiarium (Hedley & May, 1908). Retrieved through: World Register of Marine Species on 22 April 2010.
- ^ Hedley & May (1908), Mollusca from one hundred fathoms, seven miles east of Cape Pillar, Tasmania; Records of the Australian Museum v. 7 (1908) (described as Calliostoma retiarium)
- Cotton, B.C. (1959). South Australian Mollusca. Archaeogastropoda. Adelaide : Govt. Printer. pp. 1–449
- Wilson, B. (1993). Australian Marine Shells. Prosobranch Gastropods. Kallaroo, WA : Odyssey Publishing. Vol.1 1st Edn pp. 1–408.
- Marshall, B.A. (1995). Calliostomatidae (Gastropoda: Trochoidea) from New Caledonia, the Loyalty Islands and the northern Lord Howe Rise. pp. 381–458 in Bouchet, P. (ed.). Résultats des Campagnes MUSORSTOM, Vol. 14 . Mém. Mus. nat. Hist. nat. 167 : 381–458