Trilobita - Harpetida - Harpetidae
Synonyms: Arraphidae Angelin 1854, Harpidae Hawle and Corda 1847
Parent taxon: Harpetida according to J. D. Beech and J. C. Lamsdell 2021
See also Adrain 2011, Ebach and McNamara 2002, McNamara et al. 2009, Romano and Henry 1982 and Sepkoski 1998
Sister taxa: none
Subtaxa: Bohemoharpes Brachyhipposiderus Dolichoharpes Dubhglasina Eoharpes Eotrinucleus Eskoharpes Fissocephalus Globoharpes Harpes Hibbertia Kathrynia Kielania Lioharpes Palaeoharpes Scotoharpes
Ecology: fast-moving low-level epifaunal suspension feeder
Distribution:
• Devonian of Algeria (1 collection), Australia (7), Belgium (3), Brazil (1), Canada (7: Northwest Territories, Nunavut), the Czech Republic (39), France (1), Germany (6), Italy (3), Kazakhstan (1), Morocco (12), the Russian Federation (7), Thailand (1), Uzbekistan (2)
• Silurian of Australia (2), Canada (3: Northwest Territories, Quebec, Yukon Territory), China (2), the Czech Republic (27), Greenland (6), the United Kingdom (11), United States (4: Alaska, Wisconsin)
• Dobrotivian of the Czech Republic (1), France (1), Portugal (2)
• Chazyan of Canada (16: Newfoundland and Labrador, Northwest Territories, Quebec), United States (18: New York)
• Whiterockian of Canada (12: Newfoundland and Labrador, Quebec), Norway (1), United States (19: Nevada, New York, Oklahoma, Vermont)
• Volkhov of the Russian Federation (16)
• Arenig of Argentina (2), Canada (1: Newfoundland and Labrador), China (1), Sweden (1)
• Ordovician of Argentina (3), Australia (3), Canada (19: British Columbia, Newfoundland, Newfoundland and Labrador, Northwest Territories, Nunavut, Ontario, Quebec, Québec), China (11), the Czech Republic (6), Estonia (2), France (1), Iran (1), Ireland (2), Italy (1), Kazakhstan (1), Norway (10), Portugal (1), the Russian Federation (1), Sweden (5), the United Kingdom (17), United States (18: Illinois, Iowa/Wisconsin, Kentucky, Maine, Minnesota, Missouri, Oklahoma, Tennessee, Virginia)
• Tremadoc of Argentina (1), Canada (2: Alberta), China (1)
• Skullrockian of Argentina (1)
• Cambrian of Canada (1: Alberta), China (4)
Total: 349 collections including 389 occurrences