Oxystele


Oxystele is a genus of sea snails, marine gastropod mollusks in the family Trochidae, the top snails. Although previously suggested as a subgenus of Diloma, genetic analysis has shown it to be more appropriate as its own genus.

Description

The depressed conical shell is dark or variegated in color. The large aperture is oblique. The concave columella is arcuate, thin-edged, perfectly simple and curved below. It is above spread over the umbilical area as a rounded, well-defined pad of callus.
Patterns of the variegated shell color within the genus Oxystele are shown in the image : A–C Oxystele variegata from Namibia, 5 km north of Swakopmund, diameter 22.2 mm D–F Oxystele impervia from the Western Cape, Groen Rivier, diameter 22.3 mm G–I Oxystele sp. from the Eastern Cape, Tsitsikamma National Park, diameter 16.5 mm ; the colour pattern of these specimens suggests Oxystele variegata, but these specimens group within the unit of Oxystele impervia J–L Oxystele sp. from the Northern Cape, Noup, diameter 18.0 mm ; the colour pattern suggests Oxystele impervia, but they group with Oxystele variegata

Distribution

These marine species occur off South Africa and Japan.

Species

of the species in the genus Oxystele:
Other species in the genus not included in this tree are:
Species brought into synonymy: