†order Nucleocrinida Waters and Horowitz 1993 (blastoid)
Full reference: J.A. Waters and A.S. Horowitz. 1993. Ordinal-level evolution in the Blastoidea. Lethaia 26:207-213
Parent taxon: Spiraculata according to J.A. Waters and A.S. Horowitz 1993
Sister taxa: Kadiskoblastus, Malchiblastus, Monoblastus, Monoschizablastus, Pentremitida, Tanablastus, Troosticrinida, Uyguroblastus, Xinjiangoblastus
Subtaxa: Nucleocrinidae
Ecology: stationary intermediate-level epifaunal suspension feeder
Distribution: