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:
• Arenig of Bolivia (1 collection), China (7), the United Kingdom (6)
• Ordovician of China (13), the Czech Republic (1), Morocco (5), Peru (3), Spain (1)
• Tremadoc of Argentina (2)
• Cambrian of Argentina (1)
Total: 40 collections including 43 occurrences