Synonym: Nyctocrinacea Moore and Laudon 1943
Parent taxon: Diplobathrida according to W. I. Ausich 1998
See also Ausich and Copper 2010, Scheffler 2021 and Ubaghs et al. 1978
Sister taxa: Ampurocrinus, Apurocrinus, Cadisocrinus, Eudiplobathrida, Eudiplobathrina, Lemennocrinus, Moniellocrinus, Pelidocrinus, Perunocrinus, Pidelocrinus, Reteocrinicae, Rhachkicrinus, Rhodocrinitoidea, Zygodiplobathrina
Subtaxa: Aenigmaticumcrinidae Dimerocrinitidae Gazacrinidae Lampterocrinidae Nyctocrinidae Orthocrinidae Tuberocrinidae
Type: Dimerocrinitidae
Ecology: stationary upper-level epifaunal suspension feeder
Distribution:
• Devonian of Argentina (1 collection), Australia (4), Bolivia (3), the Czech Republic (1), France (2), Germany (2), Spain (1), United States (2: New York, Tennessee)
• Silurian of Australia (2), Canada (22: Ontario, Quebec, Québec), Estonia (3), the United Kingdom (2), United States (64: Illinois, Indiana, Iowa, Missouri, New York, Oklahoma, Tennessee, Wisconsin)
• Ordovician of Canada (1: Quebec), the United Kingdom (1), United States (13: Illinois, Iowa, Iowa, Iowa, Illinois, Kentucky, Minnesota, Ohio)
Total: 124 collections including 212 occurrences