Parent taxon: Dacryoconarida according to N. M. Farsan 1994
Sister taxa: Gonionowakiida, Nowakiida, Procorniculinida, Styliola, Viratellina
Subtaxa: Styliolinidae Viriatellidae
Ecology: stationary semi-infaunal suspension feeder
Distribution:
• Carboniferous of United States (1: Indiana collection)
• Devonian of Australia (3), Brazil (2), Canada (18: Manitoba, Northwest Territories, Northwest Territories and Yukon, Nunavut, Ontario, Yukon), China (25), the Czech Republic (18), France (1), Germany (5), Italy (1), Libya (1), Malaysia (2), Mongolia (4), Morocco (4), Poland (3), the Russian Federation (2), Spain (7), Tajikistan (5), Thailand (1), the United Kingdom (1), United States (81: Alaska, Indiana, Michigan, Nevada, New Jersey, New Mexico, New York, Ohio, Pennsylvania), Uruguay (1), Uzbekistan (1), Vietnam (3)
• Silurian of Bolivia (1), Canada (6: Northwest Territories)
• Ordovician of Canada (1: Nunavut)
Total: 198 collections including 231 occurrences