†family Helicoplacidae Durham and Caster 1966
Helicoplacoidea - Helicoplacidae
Parent taxon: Helicoplacoidea according to B. C. Wilbur 2006
See also Durham 1993
Sister taxa: Helicoplacida, Polyplacida, Westgardellidae
Subtaxa: Helicoplacus Polyplacus Waucobella
Ecology: stationary low-level epifaunal suspension feeder
Distribution:
• Cambrian of United States (2: California collections)
Total: 2 collections including 4 occurrences