Biology:Pleurotomella dinora

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Short description: Species of sea snail

Pleurotomella dinora
Scientific classification edit
Domain: Eukaryota
Kingdom: Animalia
Phylum: Mollusca
Class: Gastropoda
Subclass: Caenogastropoda
Order: Neogastropoda
Superfamily: Conoidea
Family: Raphitomidae
Genus: Pleurotomella
Species:
P. dinora
Binomial name
Pleurotomella dinora
Dall, 1908
Synonyms[1]

Pleurotomella (Pleurotomella) dinora Dall, 1908

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

Description

The length of the (decollated) shell attains 15 mm, its diameter 7 mm.

(Original description) The small shell is short-fusiform and stout. It is white with a pale yellowish periostracum. It contains about seven whorls. The apex is defective. The subsequent whorls are rather rapidly increasing, with an appressed suture behind a smooth and constricted anal fasciole. In front of which the shell is shouldered by a series of short, slightly protective ribs, of which, on the penultimate whorl there are fifteen, with subequal interspaces and crossed by half a dozen irregularly spaced spiral striations. These striae are ill-defined, and on the body whorl extend over the base of the shell to the siphonal canal. On the last half of the body whorl the ribs become obsolete The aperture is narrow. The anal sulcus at the suture is wide and deep. The outer lip in front of it is prominently arcuate, thin and simple. The columellar lip is smooth with a thin wash of callus. The columella is twisted and rapidly attenuated. The axis is impervious. The siphonal canal is moderately wide, short and slightly recurved. [2]

Distribution

This marine species occurs off the Galapagos Islands.

References

External links

Wikidata ☰ Q3716902 entry