Crockerella evadne

Crockerella evadne
	Original image of a shell of Crockerella evadne
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Gastropoda
Subclass:	Caenogastropoda
Order:	Neogastropoda
Superfamily:	Conoidea
Family:	Clathurellidae
Genus:	Crockerella
Species:	C. evadne
Binomial name
	Crockerella evadne; (W.H. Dall, 1919)
Synonyms
	Mangilia evadne W.H. Dall, 1919

Crockerella evadne is a species of sea snail, a marine gastropod mollusk in the family Clathurellidae.^[1]

Description

The length of the shell attains 12 mm, its diameter 3 mm.

(Original description) The small, white shell is, slender. It has a smooth swollen protoconch of 1½ whorls and five subsequent whorls. The suture is constricted, distinct, not appressed. The whorls slope flatly toward it on both sides. The axial sculpture consists only of faint incremental lines. The spiral sculpture consists of one very prominent keel at the shoulder with one smaller and several still finer threads behind it. The anal fasciole is smooth. On the body whorl there are two major threads with much wider interspaces, in front of them about six smaller closer threads to the siphonal canal which has about six close-set threads and a marked siphonal fasciole. The aperture is rather narrow. The anal sulcus is deep, rounded, separated by a single thread from the suture. The outer lip is thin, produced and sharp. The inner lip is erased. The columella is straight. The siphonal canal is distinct, rather wide and recurved.^[2]

Distribution

This marine species was found off Santa Rosa Island, California, USA.

References

^ ^a ^b Crockerella evadne (Dall, 1919). Retrieved through: World Register of Marine Species on 29 March 2010.
^ Dall (1919) Descriptions of new species of Mollusca from the North Pacific Ocean; Proceedings of the U.S. National Museum, vol. 56 (1920) This article incorporates text from this source, which is in the public domain.

McLean J.H. (1996). The Prosobranchia. In: Taxonomic Atlas of the Benthic Fauna of the Santa Maria Basin and Western Santa Barbara Channel. The Mollusca Part 2 – The Gastropoda. Santa Barbara Museum of Natural History. volume 9: 1–160

External links

Tucker, J.K. 2004 Catalog of recent and fossil turrids (Mollusca: Gastropoda). Zootaxa 682: 1–1295.
"Crockerella evadne". Gastropods.com. Retrieved 16 January 2019.

[WoRMS-1] Crockerella evadne (Dall, 1919). Retrieved through: World Register of Marine Species on 29 March 2010.

[2] Dall (1919) Descriptions of new species of Mollusca from the North Pacific Ocean; Proceedings of the U.S. National Museum, vol. 56 (1920) This article incorporates text from this source, which is in the public domain.

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