Strophomenata - Productida - Productellidae
Parent taxon: Overtoniinae according to A. Williams et al. 2007
See also Williams et al. 2000
Sister taxa: Costispiniferini, Guangia, Institiferini, Krotoviini, Lethamiini, Overtoniini
Subtaxa: Avonia Barunkhuraya Lazarevonia Onavia Quasiavonia
Type: Avonia
Ecology: stationary low-level epifaunal suspension feeder
Distribution:
• Permian of Canada (1: British Columbia collection), China (9), Iran (1), Mexico (1), Nepal (22), the Russian Federation (2), United States (37: Texas)
• Carboniferous of Canada (14: Alberta), China (4), Germany (1), Ireland (1), the United Kingdom (25), United States (26: Alaska, Arizona, Arkansas, California, Idaho, Illinois, Indiana, Missouri, Montana, Nevada, New Mexico, Oklahoma, Texas)
• Devonian of Afghanistan (1), Germany (3)
Total: 148 collections including 180 occurrences