Rhynchonellata - Spiriferida - Trigonotretidae
Full reference: C. Schuchert. 1893. A classification of the Brachiopoda. American Geologist 11:141-167
Parent taxon: Spiriferoidea according to A. Williams et al. 2006
See also Garzanti et al. 1998 and Waterhouse 2004
Sister taxa: Aulidospiridae, Choristitidae, Imbrexiidae, Reticulariacea, Spiriferellidae, Spiriferidae
Subtaxa: Costuloplicinae Neospiriferinae Trigonotretinae
Ecology: stationary epifaunal suspension feeder
Distribution:
• Permian of Afghanistan (15 collections), Australia (406), Austria (1), Bhutan (1), Bolivia (20), Canada (26: Alberta, British Columbia, Nunavut, Yukon), Chile (7), China (107), Greenland (30), Guatemala (1), India (39), Indonesia (9), Iran (2), Japan (15), Laos (2), Madagascar (1), Malaysia (6), Mexico (4), Mongolia (18), Myanmar (3), Nepal (88), New Zealand (40), Oman (27), Pakistan (221), Peru (8), the Russian Federation (90), Slovenia (1), Svalbard and Jan Mayen (27), Tajikistan (2), Thailand (19), United States (309: Alaska, Idaho, Kansas, Montana, Nevada, Oregon, Texas, Wyoming), Venezuela (4), Vietnam (2)
• Namurian of Argentina (1), Australia (9)
• Carboniferous to Permian of Bolivia (1), United States (17: California, Texas)
• Carboniferous of Afghanistan (2), Argentina (13), Australia (5), Bolivia (7), Brazil (1), Canada (1: Nunavut), Chile (1), China (3), Egypt (5), India (1), Iran (4), Malaysia (3), Mexico (1), Morocco (1), Pakistan (1), Peru (3), the Russian Federation (3), Svalbard and Jan Mayen (5), Ukraine (1), United States (420: Alaska, Arizona, California, Colorado, Illinois, Iowa, Kansas, Kentucky, Maryland, Missouri, Montana, Nebraska, Nevada, New Mexico, Ohio, Oklahoma, Pennsylvania, Texas, Utah, Washington, Oregon, Idaho, Montana, Nevada, Utah, California, Wyoming)
• Devonian of United States (1: California)
• Paleozoic of Chile (1)
Total: 2062 collections including 2491 occurrences