Oxystele is a genus of sea snails, marine gastropod mollusks in the family Trochidae, the top snails.[2] Although previously suggested as a subgenus of Diloma,[3] genetic analysis has shown it to be more appropriate as its own genus.[4]
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.[5]
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 (NMSA E6038) D–F Oxystele impervia from the Western Cape, Groen Rivier, diameter 22.3 mm (NMSA E7353) G–I Oxystele sp. from the Eastern Cape, Tsitsikamma National Park, diameter 16.5 mm (HVDBM058-10, NMSA W7371); 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 (HVDBM185-10, NMSA W7608); the colour pattern suggests Oxystele impervia, but they group with Oxystele variegata
These marine species occur off South Africa and Japan.
Phylogram (weighted maximum parsimony based on 16S, COI and actin sequence data) of the species in the genus Oxystele:[4]
OxysteleO. tigrina (Anton, 1839)[6]
O. sinensis (Gmelin, 1791)[7]
O. tabularis (Krauss, 1848)[8]
O. impervia (Menke, 1843)[9]
O. variegata (Anton, 1839)[10]
Other species in the genus not included in this tree are:
Species brought into synonymy:
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.
Oxystele is een geslacht van weekdieren uit de klasse van de Gastropoda (slakken).
Oxystele is een geslacht van weekdieren uit de klasse van de Gastropoda (slakken).
Oxystele là một chi ốc biển, là động vật thân mềm chân bụng sống ở biển trong họ Trochidae, họ ốc đụn.[1]
Các loài trong chi Oxystele gồm có:
Oxystele là một chi ốc biển, là động vật thân mềm chân bụng sống ở biển trong họ Trochidae, họ ốc đụn.