Clypeostoma cancellatum is a species of sea snail, a marine gastropod mollusc in the family Chilodontaidae.[1][2]
| Clypeostoma cancellatum | |
|---|---|
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| Original drawing with two views of a shell of Clypeostoma cancellatum | |
Scientific classification 
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| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Gastropoda |
| Subclass: | Vetigastropoda |
| Family: | Chilodontaidae |
| Genus: | Clypeostoma |
| Species: | C. cancellatum
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| Binomial name | |
| Clypeostoma cancellatum (Schepman, 1908)
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| Synonyms[1] | |
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Description
edit(Original description by M.M. Schepman) The size of the shell varies between 7 mm and 12 mm. The elevated-conical, imperforate shell has convex sides. It is yellowish-white, with a nacreous lustre and numerous yellowish-brown spots, which are darker near the upper part of each whorl and on the third whorl, the first and second being without markings. The nucleus is wanting, remaining five, slightly convex whorls with a narrow canaliculate suture. The first whorl has rather distant ribs. The next whorls have 3 spiral lirae (fine linear elevations) and radiating ribs. The last 3 whorls contain 5 spirals and thinner radiating ribs, which make the shell cancellated. These ribs become lamellose (with flared axial projections) on the lower whorls. The lirae are beaded where the ribs cross them, less obvious on the lower whorls, the uppermost of the lirae on each whorl with a series of small tubercles, giving a coronated appearance to the whorls. The body whorl is rounded, the peripheral spiral being only very little prominent. The base of the shell is convex, with 6 beaded lirae, cancellated by numerous, irregular, radiating ribs. The aperture is nearly rounded. The outer and basal margins are rounded, thin, thickened interiorly, with about 17 short lirae on the internal rib, of which that near the columella slightly tooth-like. The columella is cylindrical, rather straight, with a tooth-like fold at the base, bordering a rounded notch. The parietal wall is callous. The interior of the aperture has a few grooves.[3]
Distribution
editThis marine species occurs off Timor, Indonesia.
References
edit- ^ a b MolluscaBase eds. (2021). MolluscaBase. Clypeostoma cancellatum (Schepman, 1908). Accessed through: World Register of Marine Species at: http://www.marinespecies.org/aphia.php?p=taxdetails&id=986595 on 2021-12-28
- ^ Poppe G.T., Tagaro S.P. & Dekker H. (2006) The Seguenziidae, Chilodontidae, Trochidae, Calliostomatidae and Solariellidae of the Philippine Islands. Visaya Supplement 2: 1-228.
- ^ Schepman 1908-1913, The Prosobranchia of the Siboga Expedition; Leyden,E. J. Brill,1908-13 (described as Calliostoma (Perrinia) cancellatum )
- Vilvens, C. (2017). New species and new records of Chilodontidae (Gastropoda: Vetigastropoda: Seguenzioidea) from the Pacific Ocean. Novapex, Hors Série. 11: 1-67
External links
edit- Encyclopedia of Life
- World Register of Marine Species
- "Perrinia cancellata". Gastropods.com. Retrieved 16 January 2019.