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Thelyssina

Thelyssina is a genus of sea snails, marine gastropod mollusks in the family Seguenziidae.

Description
The conical shell contains a peripheral carina but no axial riblets, spiral lirae or microsculpture. The U-shaped posterior sinus is shallow. The anterolateral sinus is a channel. The basal sinus is present. The columella has no sinus or tooth. The aperture has a rhomboidal shape. There are no data about the radula. ==Species==
Species
Species within the genus Thelyssina include: • Thelyssina sterrha Marshall, 1983 ==References==
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