Crinoidea - Pentacrinoidea

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: Pentacrinoidea according to D. F. Wright et al. 2017

Sister taxon: Inadunata

Subtaxa: Apektocrinus ubaghsi

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Ecology: stationary upper-level epifaunal suspension feeder

Distribution: found only at FB Sinkhole (Ordovician of Idaho)

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Specimen images are retrieved through the ePANDDA API.