Crinoidea - Myelodactylida - Iocrinidae
Parent taxon: Myelodactylida according to W. I. Ausich et al. 2015
See also Ausich 1998, Ausich et al. 2018, Rozhnov 2016 and Ubaghs et al. 1978
Sister taxon: Myelodactylidae
Subtaxa: Caleidocrinus Grammocrinus Iocrinus Muicrinus Peltacrinus Ristnacrinus Schaldichocrinus Tornatilicrinus
Ecology: stationary intermediate-level epifaunal suspension feeder
Distribution:
• Letna of the Czech Republic (1 collection)
• Volkhov of the Russian Federation (1)
• Ordovician of Canada (3: Ontario), China (1), the Czech Republic (1), Estonia (32), Italy (2), Latvia (3), Portugal (1), the Russian Federation (1), Spain (2), Sweden (1), the United Kingdom (7), United States (68: Illinois, Iowa, Indiana, Iowa, Kentucky, New York, Ohio, Oklahoma, Pennsylvania)
Total: 124 collections including 137 occurrences