†subfamily Cyclotopsinae Glibert 1962 (periwinkle)
Gastropoda - Sorbeoconcha - Pomatiasidae
Parent taxon: Pomatiasidae according to Global Biodiversity Information Facility 2015
Sister taxa: Bauxia, Chondropomatidae, Dissostoma, Pomatiasinae
Subtaxa: Bembridgia
Ecology: epifaunal grazer
Distribution: found only at Creechbarrow Hill (Eocene of the United Kingdom)