Mangelia toreumata

Mangelia toreumata
Original image of a shell of Mangelia toreumata
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Gastropoda
Subclass:	Caenogastropoda
Order:	Neogastropoda
Superfamily:	Conoidea
Family:	Mangeliidae
Genus:	Mangelia
Species:	M. toreumata
Binomial name
Mangelia toreumata (Dall, 1889)
Synonyms [1]
Mangilia toreumataDall, 1889 (original description)

Mangelia toreumata is a species of sea snail, a marine gastropod mollusc in the family Mangeliidae. ^{[2] [1]}

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 siphonal canal. 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 and Guadeloupe.

References

1. MolluscaBase eds. (2021). MolluscaBase. Mangelia toreumata (Dall, 1889). Accessed through: World Register of Marine Species at: http://www.marinespecies.org/aphia.php?p=taxdetails&id=432756 on 2021-06-21
2. 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". Gastropods.com. Retrieved 16 January 2019.
• Tucker, J.K. 2004 Catalog of recent and fossil turrids (Mollusca: Gastropoda). Zootaxa 682: 1–1295.