Dillwynella aulacophora

Dillwynella aulacophora
Original images of a shell of Dillwynella aulacophora
Scientific classification
Kingdom: Animalia
Phylum: Mollusca
Class: Gastropoda
Clade: Vetigastropoda
Superfamily: Trochoidea (superfamily)
Family: Skeneidae
Genus: Dillwynella
Species: D. aulacophora
Binomial name
Dillwynella aulacophora
M. Cossmann, 1913

Dillwynella aulacophora is an extinct species of sea snail, a marine gastropod mollusk in the family Skeneidae.[1]

Description

The height of the shell attains 4 mm, its diameter 5 mm. The rather small shell had a trochoid shape. The surface appears smooth and shiny. The depressed spire consists of four or five subangular whorls, equipped with a broad groove between the spiral obsolete angle and slightly protruding bead that comes in above the linear and deep suture. In the middle of this groove, there is a small furrow that marks its deepest point. Above the angle , the profile of the whorls is a slightly convex. The body whorl is equal to five-sixths of the total height simply striated. It is marked by oblique growth lines. The periphery is obtusely subangular, non keeled , but rather rounded. The base of the shell is slightly convex and smooth. The aperture is round. The peristome is discontinuous and thin, except in the columellar region that contains a callosity.[1]

Distribution

This marine species was found as a fossil in a coal mine near Mons in Belgium.

References

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