Gymnobela edgariana

Gymnobela edgariana
	Shell of Gymnobela edgariana (specimen in MNHN, Paris)
Scientific classification
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Gastropoda
Clade:	Caenogastropoda
Clade:	Hypsogastropoda
Clade:	Neogastropoda
Superfamily:	Conoidea
Family:	Raphitomidae
Genus:	Gymnobela
Species:	G. edgariana
Binomial name
	Gymnobela edgariana; (Dall, 1889)
Synonyms[1]
	Mangilia edgariana Dall, 1889 (original combination); Pleurotomella edgariana (Dall, 1889);

Gymnobela edgariana is a species of sea snail, a marine gastropod mollusk in the family Raphitomidae.[1]

Description

The length of the shell varies between 35 mm and 64 mm.

(Original description) The large, shell isstraw-colored with a tinge of rufous about the margin of the anal sulcus outside. It contains 10-11 whorls (seven remaining, protoconch and first normal whorl broken away). The whorls are keeled or angulated at the periphery, the keel not riblike or sharp, but lightly rounded. In the first small whorls it is undulated or obscurely nodulous, but in the last four or five whorls not so. From it the posterior part of the whorl ascends to the suture almost in a straight line or section of a cone, the anterior slope is full and rounded. The anal fasciole is polished and marked only by the fine silky incremental striae. The other transverse sculpture consists solely of fine incremental lines. The spiral sculpture, beside the keel, consists of fine, rather angular threads (about seven in a space of 3.0 mm) with a single finer thread generally present, on the body whorl, in the interspaces. These cover the whole shell, which appears when quite perfect to have a thin dark olive-colored epidermis, of which only traces remain on the type. The aperture is very large, the notch being one quarter of a volution in extent, very wide, and gently rounded into the outer lip, which is correspondingly curved forward. The siphonal canal is short, wide, hardly differentiated from the aperture. The columella is nearly straight, a broad (in the type specimen) rather thick marginated callus extending from in front of the notch around on the body, well around behind the columella, and so on to the siphonal canal. In the type the edge of the callus is somewhat thickened and raised, but this seems to be due to senile degeneration. [2]

Distribution

G. edgariana can be found in Caribbean waters, ranging from the coast of Louisiana to the Lesser Antilles.[3]

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gollark: You need, if I remember right, an introspection module *and* entity sensor for such data.

gollark: Text mode will subtly mess it up.

gollark: <@!426660245738356738> I assume the bad constant issues are due to not writing it to a file in *binary* mode?

gollark: Just include the entire source code of potatOS (except the bits that actually run it), shove your code in the middle somewhere, minify, compile to bytecode, strip debug symbols, and obfuscate the string constants using my thingy maybe.

References

Gymnobela edgariana (Dall, 1889). Retrieved through: World Register of Marine Species on 29 March 2010.
Bulletin of the Museum of Comparative Zoology at Harvard College vol. 18 (1889) This article incorporates text from this source, which is in the public domain.
Tunnell, John W., Jr., Felder, Darryl L., & Earle, Sylvia A., eds. Gulf of Mexico Origin, Waters, and Biota, Volume 1: Biodiversity. Texas A&M University Press, 2009. 668.

External links

This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.

[WoRMS-1] Gymnobela edgariana (Dall, 1889). Retrieved through: World Register of Marine Species on 29 March 2010.

[2] Bulletin of the Museum of Comparative Zoology at Harvard College vol. 18 (1889) This article incorporates text from this source, which is in the public domain.

[3] Tunnell, John W., Jr., Felder, Darryl L., & Earle, Sylvia A., eds. Gulf of Mexico Origin, Waters, and Biota, Volume 1: Biodiversity. Texas A&M University Press, 2009. 668.