Rhynchonellata - Orthida - Euorthisinidae
Parent taxon: Plectorthoidea according to A. Williams et al. 2000
See also Benedetto 2007
Sister taxa: Apatoskenidioides, Chilcorthidae, Cremnorthidae, Cyclocoeliidae, Eoorthidae, Finkelnburgiidae, Giraldiellidae, Lebediorthis, Nanorthidae, Phragmorthidae, Platystrophiidae, Plectorthidae, Ranorthidae, Rhactorthidae, Tasmanorthidae, Wangyuiidae
Subtaxa: Euorthisina Lesserorthis Protorthisina
Type: Euorthisina
Ecology: stationary epifaunal suspension feeder
Distribution:
• Ordovician of Argentina (2 collections), China (13), the Czech Republic (2), Morocco (5), Peru (3), Spain (1)
• Arenig of Bolivia (1), China (7), the United Kingdom (6)
• Cambrian of Argentina (1)
Total: 41 collections including 44 occurrences