Parent taxon: Compsocrinina according to G. D. Webster and N. G. Lane 1987
See also Ubaghs et al. 1978 and Webster and Lane 2007
Sister taxa: Carpocrinacea, Carpocrinoidea, Hexacrinitacea, Hexacrinitoidea, Periechocrinoidea, Xenocrinacea, Xenocrinoidea
Subtaxa: Actinocrinitidae Amphoracrinidae Periechocrinidae Sunwaptacrinidae
Type: Periechocrinidae
Ecology: stationary upper-level epifaunal suspension feeder
Distribution:
• Permian of Australia (2 collections), Indonesia (2), United States (1: Nevada)
• Carboniferous of Australia (7), Canada (1: Alberta), China (1), Ireland (3), the United Kingdom (3), United States (56: Indiana, Iowa, Kentucky, Montana, Tennessee, Utah)
• Devonian of Canada (1: Ontario), China (2), the Czech Republic (1), Mongolia (1), South Africa (3), Spain (2), United States (3: Michigan, Ohio, Tennessee)
• Silurian of Canada (1: Ontario), the Czech Republic (1), Ukraine (1), the United Kingdom (2), United States (28: Illinois, Indiana, Iowa, New York, Ohio, Tennessee, West Virginia, Wisconsin)
Total: 122 collections including 191 occurrences