Strophomenata - Orthotetida - Triplesiidae
Parent taxon: Triplesioidea according to L. Hints and D. A. T. Harper 2015
See also Bassett and Cocks 1974, Hints et al. 2013, Jin and Chatterton 1997, Mitchell 1977, Owen and Harper 1982, Popov et al. 2000, Rõõmusoks 1964, Rubel 2011, Williams et al. 2000 and Wright 1964
Sister taxa: none
Subtaxa: Acaretyrricula Amphiplecia Bicuspina Brachymimulus Caeroplecia Cliftonia Craigella Grammoplecia Ogmoplecia Onychoplecia Onychotreta Oxoplecia Paraonychoplecia Placotriplesia Plectotreta Streptis Triplesia
Ecology: stationary low-level epifaunal suspension feeder
Distribution:
• Jaani of Estonia (6 collections), Lithuania (3)
• Silurian of Belarus (1), Canada (30: Northwest Territories, Nunavut, Quebec, Québec), China (1), the Czech Republic (7), Estonia (15), Greenland (1), Lithuania (7), Norway (1), Sweden (8), Ukraine (3), the United Kingdom (45), United States (21: Alabama, Arkansas, Indiana, Iowa, Missouri, New York, Oklahoma, Tennessee, Wisconsin)
• Dobrotivian of France (2), Spain (1)
• Letna of the Czech Republic (1)
• Chazyan of Canada (5: Newfoundland and Labrador, Northwest Territories, Quebec), United States (47: Alabama, New York, Tennessee, Vermont, Virginia)
• Whiterockian of United States (7: Arkansas, Maryland, Nevada, Pennsylvannia, Virginia)
• Ordovician to Silurian of Canada (6: Québec)
• Ordovician of Argentina (4), Australia (3), Belgium (16), Canada (21: British Columbia, Northwest Territories, Ontario, Quebec, Québec), China (43), the Czech Republic (8), Estonia (30), France (3), Ireland (6), Kazakhstan (22), Latvia (33), Lithuania (4), Mongolia (1), Morocco (1), Myanmar (1), New Zealand (1), Norway (27), Peru (2), Portugal (5), the Russian Federation (28), Spain (7), Sweden (21), Thailand (1), the United Kingdom (124), United States (57: Georgia, Illinois, Illinois, Iowa, Michigan, Minnesota, Missouri, Nevada, New York, Oklahoma, Pennsylvania, Tennessee, Virginia), Venezuela (1)
Total: 688 collections including 789 occurrences