Pyrgocythara scammoni

Pyrgocythara scammoni
Original image of a shell of Pyrgocythara scammoni
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Gastropoda
Subclass:	Caenogastropoda
Order:	Neogastropoda
Superfamily:	Conoidea
Family:	Mangeliidae
Genus:	Pyrgocythara
Species:	P. scammoni
Binomial name
Pyrgocythara scammoni (Dall, 1919)
Synonyms [1]
Philbertia scammoniDall, 1919

Pyrgocythara scammoni is a species of sea snail, a marine gastropod mollusk in the family Mangeliidae. ^[1]

Description

The length of the shell attains 7 mm, its diameter 2.5 mm.

(Original description) The small shell is whitish, with brown interspaces or bands, more or less variable. The protoconch is small, blunt and turbinate. The first whorl is smooth, the third obliquely minutely axially ribbed. The five subsequent whorls show a rather deep suture. The whorls are rounded and uniformly sculptured. The spiral sculpture consists of two kinds. On the spire two major threads near the periphery and four on the body whorl are whiter than the rest of the surface. In the interspaces the threads are much finer. The major threads are hardly swollen where they override the ribs. On the base the sculpture takes the form of about four flattish bands appressed on the anterior edge. On the siphonal canal there are only four or five close-set rounded threads. The axial sculpture consists of (on the body whorl including the terminal varix 10) rounded, rather strong ribs, extending from suture to the siphonal canal and usually vertically continuous up the spire. The shoulder is hardly indicated, the spiral sculpture passing over the ribs without nodulation. The interspaces of the reticulation are usually darker colored than the threads. The aperture is narrow, elongated, with a large rounded and conspicuous anal sulcus. The outer lip is varicose, thick, sharp edged and internally smooth. The inner lip is smooth and not callous. The siphonal canal is short, wide and hardly differentiated from the aperture. ^[2]

Distribution

This marine species occurs off Baja California, Mexico

References

1. Pyrgocythara scammoni (Dall, 1919) . Retrieved through: World Register of Marine Species  on 11 August 2011.
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 .

Further reading

• Tucker, J.K. (2004). "Catalog of recent and fossil turrids (Mollusca: Gastropoda)" (PDF). Zootaxa. 682: 1–1295.