Stenolaemata - Trepostomida - Atactotoechidae
Parent taxon: Amplexoporina according to M. Zhang et al. 2018
See also Bassler 1953, Ernst and May 2009 and Jiménez-Sánchez et al. 2015
Sister taxa: Amplexoporidae, Dyscritellidae, Eridotrypellidae, Monticuliporidae, Nicholsonella, Stenoporidae
Subtaxa: Anomalotoechus Atactotoechus Cyphotrypa Eridotrypella Koneprusiella Leptotrypella
Type: Atactotoechus
Ecology: stationary epifaunal suspension feeder
Distribution:
• Mississippian of China (1 collection)
• Devonian of Argentina (2), Australia (1), Belarus (2), Belgium (2), Canada (1: Manitoba), the Czech Republic (5), France (2), Germany (4), Iran (2), Mongolia (2), Morocco (6), the Russian Federation (2), Spain (10), Tajikistan (1), United States (22: Indiana, Iowa, Michigan, Montana, New York, Ohio), Western Sahara (1)
• Silurian of Belarus (3), Mongolia (1), Norway (1), the Russian Federation (2), Sweden (1), United States (2: Indiana, Maryland)
• Niagaran of United States (1: New York)
• Ordovician of Canada (1: British Columbia), France (1), India (1), Morocco (4), Sweden (2), United States (25: Kentucky, Minnesota, Minnesota, Iowa, Minnesota, Iowa, Wisconsin, Illinois, Ohio, Tennessee)
• Chazy of United States (5: New York)
Total: 116 collections including 177 occurrences