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Ristnacrinus Opik 1934 (Sea lily)

Crinoidea - Myelodactylida - Iocrinidae

PaleoDB taxon number: 31981

Parent taxon: Iocrinidae according to W. I. Ausich et al. 2015

Sister taxa: Caleidocrinus, Iocrinus, Muicrinus, Peltacrinus, Schaldichocrinus, Tornatilicrinus

Subtaxa: Ristnacrinus marinus, Ristnacrinus oepiki

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Type: Ristnacrinus marinus

Ecology: stationary upper-level epifaunal suspension feeder