Parent taxon: Tergomya according to P. J. Wagner 2023
See also Bouchet et al. 2005
Sister taxa: Archinacellida, Carcassonnellidae, Cyrtonellida, Halophiala, Kiringellida, Tryblidiida, Ladamarekiidae
Subtaxa: Scenellidae
Type: Scenellidae
Ecology: slow-moving low-level epifaunal grazer
Distribution:
• Devonian of Australia (1 collection), Austria (3), Czechia (2), United States (1: Michigan)
• Silurian of Canada (1: Ontario), Czechia (1)
• Dobrotivian of Czechia (1)
• Chazyan of Canada (1: Quebec), United States (5: New York)
• Ordovician of Czechia (1), North Korea (1), the Russian Federation (2), South Korea (1), United States (24: Illinois, Iowa, Michigan, Minnesota, Vermont)
• Cambrian of Antarctica (2), Australia (1), Canada (31: British Columbia, Newfoundland and Labrador, Quebec), China (16), Mexico (1), the Russian Federation (3), Spain (1), United States (3: Massachusetts, New York, Utah)
• Solvan of Canada (1: British Columbia), Norway (1), Sweden (2)
• Waucoban of Canada (1: Northwest Territories)
Total: 108 collections including 120 occurrences