Rhynchonellata - Rhynchonellida - Leiorhynchidae
Parent taxon: Leiorhynchidae according to A. Williams et al. 2002
Sister taxa: Alairhynchinae, Basilicorhynchinae, Calvinariinae, Fenestrirostrinae, Innuitellinae, Stenometoporhynchinae
Subtaxa: Caryorhynchus Eliorhynchus Eoparaphorhynchus Eumetabolotoechia Evanescirostrum Hadrotatorhynchus Havlicekella Hyborhynchella Iloerhynchus Ilopsyrhynchus Katuniella Leiorhynchus Leptocaryorhynchus Mononusphaericorhynchus Orbiculatisinurostrum Paurorhyncha Properotundirostrum Rossirhynchus Ryocarhynchus Stenoglossariorhynchus Striatorhynchus Tenuisinurostrum Werneckeella Ypsilorhynchus
Type: Leiorhynchus
Ecology: stationary epifaunal suspension feeder
Distribution:
• Permian of Canada (3: Yukon collections), Mexico (3), the Russian Federation (2), United States (9: Idaho, Texas, Utah, Wyoming)
• Carboniferous of Argentina (2), Australia (1), Czechia (3), Iran (3), Peru (1), the United Kingdom (5), United States (25: Alaska, California, Colorado, Idaho, Indiana, Missouri, Montana, Nevada, New Mexico, Utah)
• Devonian of Afghanistan (5), Australia (1), Canada (23: Alberta, British Columbia, Northwest Territories, Northwest Territories and Yukon, Nunavut, Ontario, Yukon), China (16), Colombia (1), Czechia (2), France (1), Germany (5), Iran (5), Libya (10), Poland (7), the Russian Federation (3), United States (542: Alaska, Arizona, Colorado, Iowa, Maryland, Michigan, Montana, Nevada, New Jersey, New Mexico, New York, Ohio, Oklahoma, Pennsylvania, Virginia)
• Silurian of United States (1: California)
Total: 679 collections including 716 occurrences