Crinoidea - Cladida - Apektocrinidae
Full reference: T. E. Guensburg and J. Sprinkle. 2009. Solving the mystery of crinoid ancestry: new fossil evidence of arm origin and development. Journal of Paleontology 83(3):350-364
Parent taxon: Cladida according to T. E. Guensburg and J. Sprinkle 2009
Sister taxa: Aaglacrinus, Aethocrinidae, Aithriocrinus, Ampelocrinida, Bicidiocrinus, Briseocrinus, Cathetocrinus, Cromyocrinacea, Cyathocrinacea, Dendrocrinina, Dimerocrinites anticostiensis, Eucladida, Flexibilia, Harmostocrinus, Idaeumocrinus, Kanabinocrinus, Kansacrinus, Kooptoonocrinus, Lanecrinus, Lekocrinus, Mathericrinus, Menniscocrinus, Nacocrinus, Nuxocrinus, Parascytalocrinus, Perittocrinus, Porocrinoidea, Poteriocrinina, Poteriocrinitina, Pskovicrinus, Pulaskicrinus, Pyrenocrinus, Rimosidocrinus, Saccosompsis, Sardinocrinus, Scammatocrinus, Treocrinus, Wetherbyocrinus, Worthenocrinus
Subtaxa: Apektocrinus
Type: Apektocrinus
Ecology: stationary intermediate-level epifaunal suspension feeder
Distribution: found only at FB Sinkhole (Ordovician of Idaho)