Biology:Crockerella toreumata
| Crockerella toreumata | |
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| Original image of a shell of Crockerella toreumata | |
| Scientific classification | |
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| Class: | Gastropoda
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| Species: | C. toreumata
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| Binomial name | |
| Crockerella toreumata (Dall, 1889)
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| Synonyms[1] | |
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Crockerella toreumata is a species of sea snail, a marine gastropod mollusc in the family Clathurellidae.[2]
Description
The length of the shell attains 10.2 mm, its diameter 4 mm.
(Original description) The shell is seven-whorled. The protoconch is lost, the fragment of it remaining is smooth and colored like the rest of the shell, a pale straw color. The spiral sculpture consists of a large undulate thread, or continuous series of undulations, flat behind, sloping forward, sixteen or seventeen on the whorl next to the last. These give the whorl a turreted appearance. The spiral sculpture consists further of a strong simple thread revolving a short distance in front of the suture and forming the posterior margin of the fasciole. There are also a dozen or more similar threads on the body whorl, extending from the periphery, where the interspaces are wide, to the siphonal canal, where they are narrow. On the first three whorls of the spire none of these threads are visible. On the whorl next the last there are two between the suture and the shoulder of the whorl. The transverse sculpture consists of rather strong, even, irregularly spaced, concavely arched waves, which cross the fasciole from side to side like a succession of irregularly huddled parentheses; also of a few faint ridges on the base due to incremental irregularities. The base of the shell is subconic, slightly constricted for the siphonalcanal. The anal notch is wide, squarely cut, rounded at the bottom, not touching the suture, a little deeper than wide. The outer lip is arched forward, thin, not lirate within. The inner lip is smooth and simple. The columella is straight. The siphonal canal is short, wide, very slightly recurved, leaving a fasciole behind the columella which is slightly obliquely trimmed off anteriorly. The aperture is long, narrow and shorter than the spire (described as Mangilia toreumata)[2]
Distribution
This marine species occurs off Dominica.
References
- ↑ Mangelia toreumata (Dall, 1889). Retrieved through: World Register of Marine Species on 10 August 2011.
- ↑ 2.0 2.1 Dall W. H. 1889. Reports on the results of dredging, under the supervision of Alexander Agassiz, in the Gulf of Mexico (1877-78) and in the Caribbean Sea (1879-80), by the U.S. Coast Survey Steamer "Blake", Lieut.-Commander C.D. Sigsbee, U.S.N., and Commander J.R. Bartlett, U.S.N., commanding. XXIX. Report on the Mollusca. Part 2, Gastropoda and Scaphopoda. Bulletin of the Museum of Comparative Zoölogy at Harvard College 18: 1–492, pls. 10–40
This article incorporates text from this source, which is in the public domain.
External links
- "Crockerella toreumata" (in en). Gastropods.com. http://www.gastropods.com/6/Shell_23786.shtml.
- Tucker, J.K. 2004 Catalog of recent and fossil turrids (Mollusca: Gastropoda). Zootaxa 682: 1–1295.
Wikidata ☰ Q3176487 entry
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