Parent taxon: Rhombifera according to J. F. Bockelie 1982
See also Beaver et al. 1967 and Mergl and Prokop 2006
Sister taxa: Acantholepis, Caryocystitidacea, Dibrachicystidae, Dichoporita, Glyptocystitida, Glyptocystitidacea, Glyptocystitoida, Hillocystida, Pirocystella, Pleurocystitida, Polycosmitida, Thomacystis
Subtaxa: Caryocystitidae Ulrichocystidae
Type: Caryocystitidae
Ecology: stationary intermediate-level epifaunal suspension feeder
Distribution:
• Uhaku of Sweden (2 collections)
• Ordovician of Algeria (1), Belgium (2), Czechia (3), Estonia (1), Iran (1), Latvia (1), Lithuania (1), Morocco (3), Norway (3), Portugal (3), Spain (7), Sweden (39), the United Kingdom (1), United States (8: Kentucky, Tennessee, Virginia)
Total: 76 collections including 106 occurrences