Parent taxon: Athyrididina according to L. Hints and D. A. T. Harper 2015
See also Williams et al. 2002
Sister taxa: Apheathyris, Athyridacea, Athyridioidea, Athyridoidea, Athyridoidea, Nucleospiroidea, Retzielloidea
Subtaxa: Kellerella Meristellidae Meristidae Triathyrididae
Ecology: stationary low-level epifaunal suspension feeder
Distribution:
• Carboniferous of Australia (1 collection), Canada (1: Nunavut), Mexico (1), United States (11: Illinois, Iowa, Missouri, Montana, Oklahoma, Texas)
• Givetian of United States (1: Missouri)
• Devonian of Afghanistan (1), Argentina (1), Australia (3), Austria (1), Belarus (1), Belgium (4), Bolivia (11), Brazil (3), Canada (29: British Columbia, Manitoba, New Brunswick, Northwest Territories, Nova Scotia, Nunavut, Ontario, Quebec, Yukon), China (2), Colombia (15), the Czech Republic (14), France (3), Germany (4), Italy (2), Morocco (4), Myanmar (2), Poland (1), the Russian Federation (7), South Africa (3), Spain (3), Ukraine (3), United States (199: Alaska, California, Colorado, Indiana, Iowa, Kentucky, Maryland, Michigan, Missouri, Montana, Nevada, New York, Oklahoma, Tennessee, Virginia, West Virginia, Maryland, Pennsylvania), Venezuela (4), Vietnam (1)
• Whitwellian of Canada (3: Northwest Territories)
• Jaani of Estonia (11), Lithuania (3)
• Niagaran of Canada (2: Québec), United States (2: New York, Ohio)
• Silurian to Devonian of Algeria (1), Australia (1), United States (1: Oklahoma)
• Silurian of Argentina (3), Australia (2), Canada (105: Anticosti, Manitoba, New Brunswick, Northwest Territories, Nova Scotia, Nunavut, Ontario, Quebec, Québec, Yukon, Yukon Territory), China (15), the Czech Republic (12), Estonia (22), Italy (1), Lithuania (18), Mexico (11), Mongolia (2), Norway (10), Peru (1), the Russian Federation (14), Spain (2), Sweden (16), Ukraine (4), the United Kingdom (86), United States (206: Alabama, Alaska, Arkansas, California, Illinois, Indiana, Iowa, Kentucky, Maryland, Michigan, Michigan and Ohio, Missouri, Nevada, New York, Ohio, Oklahoma, Tennessee, West Virginia, Wisconsin), Venezuela (3)
• Ordovician to Silurian of Canada (5: Québec)
• Ordovician of Canada (41: Quebec, Québec), China (29), the Czech Republic (5), Estonia (7), Iran (1), Ireland (1), Kazakhstan (10), Latvia (27), Lithuania (1), Myanmar (1), New Zealand (1), Norway (24), Paraguay (1), Sweden (18), the United Kingdom (22), United States (6: Alaska, Illinois, Missouri, Oklahoma)
Total: 1093 collections including 1326 occurrences