†family Petalocrinidae Weller and Davidson 1896 (Sea lily)
Crinoidea - Cyathocrinida - Petalocrinidae
Weller, S., Davidson, A.D., 1896. Petalocrinus mirabilis (n. sp.) and a new American fauna. The Journal of Geology 4 (2), 166173.
Parent taxon: Gasterocomacea according to Y. Y. Mao et al. 2015
Sister taxa: Cupressocrinitidae, Gasterocomidae, Sphaerocrinidae
Subtaxa: Eopetalocrinus Petalocrinus Sinopetalocrinus Spirocrinus Vadarocrinus
Type: Petalocrinus
Ecology: stationary intermediate-level epifaunal suspension feeder
Distribution:
• Devonian of Czechia (1 collection)
• Silurian of Canada (2: British Columbia), China (6), the United Kingdom (2), United States (14: Indiana, Iowa, Nebraska)
• Ordovician of China (1)
Total: 26 collections including 29 occurrences