Rhynchonellata - Atrypida - Atrypidae
Parent taxon: Atrypidae according to W. I. Mitchell 1977
See also Bassett and Cocks 1974
Sister taxa: Atrypinae, Gibberosatrypa, Invertininae, Pseudogruenewaldtiinae, Spinatrypinae, Variatrypinae, Waiotrypa, Zygospirinae
Subtaxa: Plectatrypa
Ecology: stationary epifaunal suspension feeder
Distribution:
• Devonian of United States (2: Nevada collections)
• Whitwellian of Canada (3: Northwest Territories)
• Jaani of Estonia (3)
• Niagaran of United States (1: Indiana)
• Silurian of Australia (2), Canada (15: Manitoba, New Brunswick, Northwest Territories, Nunavut, Ontario, Québec), China (2), Czechia (1), Estonia (2), Lithuania (2), Mongolia (2), Norway (3), the Russian Federation (10), Sweden (22), Ukraine (1), the United Kingdom (8), United States (44: Arkansas, California, Illinois, Indiana, Iowa, Nevada, New York, Wisconsin), Venezuela (1)
• Ordovician of Argentina (2), China (7), Lithuania (2), the Russian Federation (4), the United Kingdom (6)
Total: 145 collections including 156 occurrences