Artiopoda - Agnostida - Peronopsidae
Parent taxon: Agnostoidea according to R. Lerosey-Aubril et al. 2020
See also Harrington and Leanza 1957, Hong et al. 2003, Naimark and Pegel 2017, Robison 1995 and Whittington et al. 1997
Sister taxon: Hypagnostoidae
Subtaxa: Archaeagnostus Gratagnostus Itagnostus Micagnostus Pentagnostus Peronopseinae Peronopsella Peronopsis Phalacrominae Quadragnostus Redeagnostus Sphaeragnostus
Ecology: nektonic suspension feeder
Distribution:
• Dobrotivian of Czechia (1 collection)
• Ordovician of Argentina (9), Canada (2: Quebec), China (7), Czechia (1), Denmark (1), Poland (1), Sweden (3), the United Kingdom (3), United States (1: Maine)
• Cambrian of Antarctica (1), Argentina (1), Australia (9), Canada (42: Alberta-British Columbia, Brithish Columbia, British Columbia, Newfoundland and Labrador, Northwest Territories, Quebec), China (18), Czechia (9), Denmark (3), France (1), Greenland (12), India (2), Iran (1), Italy (1), Kazakhstan (24), Mexico (1), Morocco (1), Norway (2), Poland (1), the Russian Federation (4), Spain (5), Sweden (5), Türkiye (4), the United Kingdom (5), United States (76: Alaska, California-Nevada, Georgia, Idaho, Montana, Nevada, Nevada and California, New York, Pennsylvania, South Carolina, Utah, Vermont)
• Templetonian of Australia (4), United States (1: Nevada)
• Solvan of Australia (2), Canada (24: Newfoundland and Labrador), Czechia (4), Spain (1)
• Amgan of Kazakhstan (5), Kyrgyzstan (1), Norway (1), the Russian Federation (8), United States (2: Utah)
Total: 310 collections including 407 occurrences