Parent taxon: Spiraculata according to J.A. Waters and A.S. Horowitz 1993
See also Lane et al. 2001
Sister taxa: Kadiskoblastus, Malchiblastus, Monoblastus, Monoschizablastus, Nucleocrinida, Pentremitida, Tanablastus, Troosticrinida, Uyguroblastus, Xinjiangoblastus
Subtaxa: Granatocrinidae Iranoblastus Schizoblastidae
Ecology: stationary intermediate-level epifaunal suspension feeder
Distribution:
• Permian of Indonesia (2 collections), Oman (4)
• Carboniferous of Belgium (1), Canada (1: Alberta), China (1), Iran (2), the United Kingdom (1), United States (45: Alabama, Arkansas, Illinois, Indiana, Iowa, Kentucky, Missouri, New Mexico, Tennessee)
• Devonian of China (1), United States (2: Kentucky, Missouri)
Total: 60 collections including 79 occurrences