†suborder Biddulphiineae (diatom)
Bacillariophyceae - Biddulphiales
Parent taxon: Biddulphiales according to G. Andrews 1976
Sister taxa: none
Subtaxa: Eucampiaceae Terpsinoaceae
Ecology: "photoautotroph"
Distribution: found only at Calvert Cliffs Nuclear Power Plant, Zone 17 (Miocene of Maryland)