Rhynchonellata - Rhynchonellida - Trigonirhynchiidae
Parent taxon: Trigonirhynchiidae according to A. Williams et al. 2002
Sister taxa: Ancillotoechia, Angustispatulata, Ptychomalotoechia, Ripidiorhynchinae, Rostricellulinae, Trigonirhynchiinae, Virginiatinae
Subtaxa: Bathyrhyncha Browneella Dalerhynchus Dushanirhynchia Hemitoechia Lenatoechia Libyaerhynchus Losvia Luterella Nymphorhynchia Pampoecilorhynchus Paurogastroderhynchus Ptychomaletoechia Sartenaerus Tabarhynchus Yanetechia
Type: Hemitoechia
Ecology: stationary epifaunal suspension feeder
Distribution:
• Carboniferous of China (2 collections), Libya (1)
• Devonian to Carboniferous of China (1), the United Kingdom (1)
• Devonian of Afghanistan (6), Armenia (3), Australia (2), Canada (10: Alberta, Yukon, Yukon Territory), China (6), the Czech Republic (1), Germany (14), Iran (13), Italy (2), Kyrgyzstan (1), Libya (2), Morocco (3), Poland (6), the Russian Federation (20), Tajikistan (3), Ukraine (1), the United Kingdom (6), United States (6: Nevada, Ohio)
• Jaani of Estonia (5)
• Silurian of Belarus (1), Canada (1: Northwest Territories), Mongolia (2), Poland (1), the Russian Federation (14), Ukraine (2)
• Ordovician to Silurian of the Russian Federation (1)
• Ordovician of the Russian Federation (3)
Total: 140 collections including 186 occurrences