Biology:Turbonilla lepta

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Short description: Species of gastropod

Turbonilla lepta
Turbonilla lepta 001.png
Drawing of a shell of Turbonilla lepta
Scientific classification edit
Domain: Eukaryota
Kingdom: Animalia
Phylum: Mollusca
Class: Gastropoda
Subclass: Heterobranchia
Family: Pyramidellidae
Genus: Turbonilla
Species:
T. lepta
Binomial name
Turbonilla lepta
Dall & Bartsch, 1909
Synonyms

Turbonilla (Pyrgiscus) lepta Dall & Bartsch, 1909

Turbonilla lepta is a species of sea snail, a marine gastropod mollusk in the family Pyramidellidae, the pyrams and their allies.[1]

Description

The milk-white shell is very slender and has an elongate-conic shape. The shell grows to a length of 2.7 mm. The 1¾ whorls of the protoconch are depressed, and helicoid. Their axis is at right angles to that of the succeeding turns, in the first of which they are very slightly immersed. The eight whorls of the teleoconch are slightly rounded. They are marked by well-developed, straight, rounded, strongly retractive axial ribs, of which there are 20 upon the first, 18 upon the second to sixth, and 20 upon the penultimate turn. The intercostal spaces are about as wide as the ribs. They are marked by eight equal and equally spaced incised spiral lines. The sutures are well impressed. The periphery and the base of the body whorl are well rounded. They are marked by the continuations of the axial ribs and five equal and equally spaced incised spiral lines. The aperture is oval. The posterior angle is acute. The outer lip is thin, showing the external sculpture within. The columella is slender, curved, and slightly revolute.[2]

Distribution

The type specimen occurs off La Paz at the Gulf of California.

References

External links

Wikidata ☰ Q3740282 entry