Synonym: Mixopteroidea Caster and Kjellesvig-Waering 1955
Parent taxon: Diploperculata according to J. C. Lamsdell 2025
See also Dunlop et al. 2013, Dunlop et al. 2020 and Lamsdell et al. 2013
Sister taxa: Adelophthalmoidea, Pterygotioidea, Pterygotoidea, Waeringopteroidea
Subtaxa: Carcinosomatidae Lanarkopteridae Megalograptidae Mixopteridae
Type: Carcinosomatidae
Ecology: nektobenthic carnivore
Distribution:
• Devonian of Canada (2: Northern Territories, Northwest Territories collections), Czechia (1), Germany (1)
• Silurian of Canada (4: Nunavut, Ontario), China (3), Czechia (2), Estonia (1), France (1), Libya (1), Norway (5), Sweden (2), the United Kingdom (8), United States (18: Indiana, New York, Pennsylvania), Vietnam (2)
• Ordovician of United States (10: Iowa, New York, Ohio, Pennsylvania, Virginia)
Total: 61 collections including 64 occurrences