Shell Family of Taiwan
Retusidae 凹塔螺科contain32 species in Taiwan，show31 - 32
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Retusidae ：Shell usually small, cylindrical to ovate. Spire slightly elevated or depressed. Aperture extends entire length of body whorl. Radula lacking. Animal white without parapodia. Cephalic shield bilobed posteriorly.
Senitfic Name
Chinese Name
omenclator
photo
 Volvula rostrata   A. Adams  
 Volvulopsis chinensis   Lin