Parent taxon: Paterinida according to L.E. Holmer et al. 2017
See also Bruton and Harper 2000, Hansen and Holmer 2011, Popov 2000, Skovsted et al. 2017 and Williams et al. 2000
Sister taxon: Paterinacea
Subtaxa: Cryptotretidae Paterinidae
Ecology: stationary epifaunal suspension feeder
Distribution:
• Uhaku of Sweden (1 collection)
• Chazyan of United States (1: Alabama)
• Ordovician of China (1), Kazakhstan (1), Norway (8), the Russian Federation (3), Sweden (3)
• Tremadoc of China (1), the Czech Republic (2)
• Cambrian of Antarctica (2), Argentina (1), Australia (34), Canada (104: Alberta, Alberta-British Columbia, British Columbia, Labrador, Newfoundland, Newfoundland and Labrador, Northwest Territories, Nova Scotia, Nunavut), China (3), Denmark (4), France (1), Greenland (9), Kazakhstan (16), Kyrgyzstan (1), Mexico (3), New Zealand (1), Norway (1), the Russian Federation (7), Spain (6), the United Kingdom (6), United States (72: Arizona, California, Idaho, Montana, Nevada, New York, Pennsylvania, Texas, Utah, Vermont, Virginia, Washington, Wyoming)
• Solvan of Australia (1), Sweden (1)
• Amgan of Kazakhstan (6)
• Delamaran of Canada (30: British Columbia), Mexico (3), United States (12: California, Idaho, Montana, Nevada, Pennsylvania, Utah, Virginia)
• Caerfai of United States (1: Nevada)
• Waucoban of United States (1: Washington)
Total: 347 collections including 397 occurrences