Order Poromyida Ridewood 1903 (clam)
Alternative spelling: Poromyoida
Parent taxon: Poromyata according to J. G. Carter et al. 2011
See also Nevesskaja 2009 and Newell 1965
Sister taxa: Pandorida, Pholadomyida, Thraciida
Subtaxa: Cuspidarioidea Parilimyoidea Poromyoidea Verticordioidea
Ecology: facultatively mobile infaunal suspension feeder