Mangelia sagena

Mangelia sagena
	Shell of Mangelia sagena (syntype at the Smithsonian Institution)
Scientific classification
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Gastropoda
Clade:	Caenogastropoda
Clade:	Hypsogastropoda
Clade:	Neogastropoda
Superfamily:	Conoidea
Family:	Mangeliidae
Genus:	Mangelia
Species:	M. sagena
Binomial name
	Mangelia sagena; (W.H. Dall, 1927)
Synonyms[1]
	Daphnella sagena Dall, 1927

Mangelia sagena is a species of sea snail, a marine gastropod mollusk in the family Mangeliidae.[1]

Description

The length of the shell attains 5 mm, its diameter 2.2 mm.

(Original description) The small shell is vitreous white. It is few whorled, the body whorl much the largest. It contains a smooth protoconch of1½ whorl and somewhat more than 3½ subsequent whorls. The suture is inconspicuous, not constricted. The fasciole is feebly marked. The axial sculpture consists of (on the body whorl about a dozen) low rounded ribs with much wider interspaces, crossing the whorls, and well-marked close incremental lines. The spiral sculpture consists of (on the first adult whorl 2, on the next 3, and on the body whorl 8 or 9) sharp fine threads with much wider interspaces, a little swollen where they override the ribs, and forming by the intersection a rather open reticulum. In the interspaces are very fine close spiral striae. This sculpture covers the shell. The aperture is narrow, hardly wider than the siphonal canal. The anal sulcus is very shallow. The outer lip is hardly thickened. The columella is short and straight, axis impervious.[2]

Distribution

This marine species was found off Fernandina, Florida, USA at a depth of 805 m.

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References

Mangelia sagena (Dall, 1927). Retrieved through: World Register of Marine Species on 9 August 2011.
Dall W. H. (1927). Small shells from dredgings off the southeast coast of the United States by the United States Fisheries Steamer "Albatross", in 1885 and 1886; Proceedings of the United States National Museum, 70(18): 1–134 This article incorporates text from this source, which is in the public domain.

This article incorporates public domain material from websites or documents of the Smithsonian Institution.

External links

Smithsonian Institution: Daphnella sagena
"Mangelia sagena". Gastropods.com. Retrieved 16 January 2019.

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[WoRMS-1] Mangelia sagena (Dall, 1927). Retrieved through: World Register of Marine Species on 9 August 2011.

[2] Dall W. H. (1927). Small shells from dredgings off the southeast coast of the United States by the United States Fisheries Steamer "Albatross", in 1885 and 1886; Proceedings of the United States National Museum, 70(18): 1–134 This article incorporates text from this source, which is in the public domain.