†family Terpsinoaceae (diatom)
Bacillariophyceae - Biddulphiales - Terpsinoaceae
Parent taxon: Biddulphiineae according to G. Andrews 1976
Sister taxon: Eucampiaceae
Subtaxa: Terpsinoe
Ecology: "photoautotroph"
Distribution: found only at Calvert Cliffs Nuclear Power Plant, Zone 17 (Miocene of Maryland)