†order Prosamatifera Eisenack 1931
Parent taxon: Chitinozoa according to J. Nõlvak 2007
Sister taxa: none
Subtaxa: Conochitinidae
Distribution:
• Silurian of the Czech Republic (4 collections), Estonia (52), Latvia (1), the Russian Federation (2), Ukraine (4)
• Ordovician of Argentina (1), Canada (6: Quebec), China (1), Estonia (6), France (1), Morocco (1), Portugal (1), the Russian Federation (2), South Africa (1), Spain (1), Sweden (2), United States (1: New York)
Total: 87 collections including 153 occurrences