Parent taxon: Rhombifera according to M. Mergl and R. J. Prokop 2006
Sister taxa: Acantholepis, Caryocystitida, Dibrachicystidae, Dichoporita, Glyptocystitida, Glyptocystitidacea, Glyptocystitoida, Hillocystida, Pirocystella, Pleurocystitida, Polycosmitida, Thomacystis
Subtaxa: none
Ecology: stationary intermediate-level epifaunal suspension feeder
Distribution:
• Uhaku of Latvia (1 collection), Lithuania (1), the Russian Federation (1)
• Dobrotivian of Morocco (2)
• Letna of Czechia (1)
• Ordovician of Algeria (1), Belgium (2), China (1), Czechia (6), Estonia (3), Iran (1), Ireland (4), Latvia (4), Lithuania (6), Morocco (6), Norway (9), Portugal (2), the Russian Federation (3), Sweden (17), the United Kingdom (3), United States (24: Colorado, Missouri, Oklahoma, Tennessee, Virginia)
Total: 98 collections including 103 occurrences