Parent taxon: Redlichiina according to J. M. Adrain 2011
See also Landing et al. 2008
Sister taxa: Akbashichia, Bathynotidae, Ellipsocephaloidea, Emuelloidea, Fandianaspis, Gonioteloides, Iolgia, Redlichioidea
Subtaxa: Centropleuridae Paradoxididae Xystriduridae
Type: Xystridurinae
Ecology: fast-moving low-level epifaunal carnivore
Distribution:
• Cambrian of Antarctica (2 collections), Australia (4), Canada (15: New Brunswick, Newfoundland, Newfoundland and Labrador), China (1), Czechia (11), Denmark (2), France (6), Germany (4), Greenland (5), Italy (3), Morocco (17), Norway (3), Poland (3), the Russian Federation (6), Spain (9), Sweden (9), Türkiye (20), the United Kingdom (5), United States (5: Alaska, Massachusetts, South Carolina, Vermont)
• Templetonian of Australia (1)
• Solvan of Australia (2), Czechia (7), Norway (1), the Russian Federation (2), Spain (2), Sweden (1), United States (1: Nevada)
• Amgan of Czechia (3), Norway (1), Poland (1), the Russian Federation (5), Sweden (2)
Total: 159 collections including 235 occurrences