†subfamily Eupodiscoideae (diatom)
Bacillariophyceae - Centrales - Eupodiscaceae
Parent taxon: Eupodiscaceae according to G. Andrews 1976
Sister taxa: Eupodiscus, Triceratium
Subtaxa: Rattrayella
Ecology: passively mobile planktonic "photoautotroph"
Distribution: found only at Calvert Cliffs Nuclear Power Plant, Zone 17 (Miocene of Maryland)