Parent taxon: Eublastoidea according to J.A. Waters and A.S. Horowitz 1993
See also Beaver et al. 1967, Macurda 1964 and Sepkoski 2002
Sister taxa: none
Subtaxa: Arcuoblastus Conuloblastus Costatoblastus Deliablastus Diploblastidae Euryoblastus Gongyloblastus Iranoblastus Kadiskoblastus Malchiblastus Monoblastus Monoschizablastus Montanablastus Nucleocrinidae Orbitremitidae Pentremitidae Perittoblastus Pyramiblastus Sinopetaloblastus Tanablastus Tanaoblastus Uyguroblastus Xinjiangoblastus Xyeleblastus
Ecology: stationary intermediate-level epifaunal suspension feeder
Distribution:
• Permian of Australia (5 collections)
• Carboniferous of Canada (5: Alberta, Northwest Territories, Yukon), Iran (2), Ireland (1), the United Kingdom (2), United States (152: Alabama, Arizona, Arkansas, Georgia, Illinois, Indiana, Iowa, Kentucky, Missouri, Montana, Nevada, New Mexico, Oklahoma, Pennsylvania, Tennessee, Utah, Virginia)
• Devonian of China (9), Mongolia (1), United States (20: Indiana, Iowa, Kentucky, Michigan, Missouri, Montana, New York, Ohio)
Total: 197 collections including 317 occurrences