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 Diplorrhina Gratagnostus Itagnostus Micagnostus Pentagnostus Peronopseinae Peronopsella Peronopsis Phalacrominae Quadragnostus Redeagnostus
Ecology: nektonic suspension feeder
Distribution:
• Tremadoc of Argentina (9 collections)
• Solvan of Australia (2), Canada (23: Newfoundland and Labrador), the Czech Republic (4), Spain (1)
• Amgan of Kazakhstan (5), Kyrgyzstan (1), Norway (1), the Russian Federation (6), United States (2: Utah)
• Delamaran of Canada (26: British Columbia), Mexico (1), Morocco (1), United States (12: California-Nevada, Idaho, Nevada, Nevada and California, Pennsylvania, Utah)
• Ordian of Australia (3)
• Cambrian of Antarctica (1), Argentina (1), Australia (7), Canada (15: Alberta-British Columbia, Brithish Columbia, British Columbia, Newfoundland and Labrador, Northwest Territories, Quebec), China (20), the Czech Republic (9), Denmark (3), France (1), Greenland (11), India (2), Iran (1), Italy (1), Kazakhstan (25), Norway (2), Poland (1), the Russian Federation (4), Spain (5), Sweden (4), Turkey (4), the United Kingdom (5), United States (65: Alaska, Georgia, Idaho, Montana, Nevada, New York, Pennsylvania, South Carolina, Utah, Vermont)
Total: 284 collections including 383 occurrences