†order Pentremitida Matsumoto 1929 (blastoid)
Parent taxon: Blastoidea according to N. G. Lane et al. 2001
Sister taxa: Coronoidea, Eublastoidea, Fissiculata, Granatocrinida, Lysocystites, Macurdablastus, Troosticrinida, Zygocrinus
Subtaxa: Hyperoblastidae
Ecology: stationary intermediate-level epifaunal suspension feeder
Distribution: