Spirotropis laodice

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Spirotropis laodice
Spirotropis laodice 001.jpg
Original image of a shell of Spirotropis laodice
Scientific classification OOjs UI icon edit-ltr.svg
Domain: Eukaryota
Kingdom: Animalia
Phylum: Mollusca
Class: Gastropoda
Subclass: Caenogastropoda
Order: Neogastropoda
Superfamily: Conoidea
Family: Drilliidae
Genus: Spirotropis
Species:
S. laodice
Binomial name
Spirotropis laodice
(Dall, 1919)
Synonyms [1]

Mangilia laodiceDall, 1919

Spirotropis laodice is a species of sea snail, a marine gastropod mollusk in the family Drilliidae. [1]

Contents

In 1971 McLean put this species in the genus Spirotropis [2]

Description

The length of the shell attains 7.7 mm, its diameter 3.5 mm.

(Original description) The small, thin, white shell contains six well-rounded whorls exclusive of the (lost) protoconch. The suture is appressed, distinct, undulated by the sculpture. The spiral sculpture is variable sometimes with well marked threads (six on the body whorl) and a finer intercalary thread in the rather wide interspaces, and sometimes with the spirals obsolete or absent. When present the suture may have a thickened edge with one thread on the preceding whorl immediately behind it, or it may be quite simple. The axial sculpture consists of (on the penultimate whorl about a dozen) short, subnodulous, slightly oblique ribs which do not cross the anal fasciole and become obsolete on the base, separated by narrower interspaces. The anal fascioleis slightly excavated, smooth except for incremental arcuate lines close to the suture. The aperture is narrow. The anal sulcus is wide and deep. The outer lip is thin, sharp and prominently arcuately produced. The inner lip is erased. The short columella is attenuated in front and gyrate. The axis is pervious. The siphonal canal is narrow, short and slightly recurved. [3]

Distribution

This species occurs in the demersal zone of the Pacific Ocean off Ecuador.

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References

  1. 1 2 Spirotropis laodice (Dall, 1919) . Retrieved through: World Register of Marine Species  on 5 November 2011.
  2. ↑ McLean, J.H. (1971b) Family Turridae. In Keen, A.M. (Ed.) Sea Shells of Tropical West America. Marine Mollusks from Baja California to Peru. Second Edition. Stanford University Press, Stanford, California, pp. 686–766
  3. ↑ Dall (1919) Descriptions of new species of Mollusca from the North Pacific Ocean; Proceedings of the U.S. National Museum, vol. 56 (1920) (described as Mangilia laodice)
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