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, Temple 1987, 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)
• Uhaku of the Russian Federation (1)
• Letna of the Czech Republic (1)
• Whiterockian of United States (7: Arkansas, Maryland, Nevada, Pennsylvannia, Virginia)
• Chazyan of Canada (5: Newfoundland and Labrador, Northwest Territories, Quebec), United States (47: Alabama, New York, Tennessee, Vermont, 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 (7), Estonia (30), France (3), Iran (2), 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 (58: Georgia, Illinois, Illinois, Iowa, Michigan, Minnesota, Missouri, Nevada, New York, Oklahoma, Pennsylvania, Tennessee, Virginia), Venezuela (1)
Total: 691 collections including 792 occurrences