†family Rhactorthidae Williams 1963
Rhynchonellata - Orthida - Rhactorthidae
Alternative spelling: Rhactorthinae
Parent taxon: Plectorthoidea according to A. Williams et al. 2000
See also Owen and Harper 1982, Potter 1990 and Wright 1964
Sister taxa: Apatoskenidioides, Chilcorthidae, Cremnorthidae, Cyclocoeliidae, Eoorthidae, Euorthisinidae, Finkelnburgiidae, Giraldiellidae, Lebediorthis, Nanorthidae, Phragmorthidae, Platystrophiidae, Plectorthidae, Ranorthidae, Tasmanorthidae, Wangyuiidae
Subtaxa: Aberia Eripnifera Rhactorthis
Distribution:
• Ordovician of China (1 collection), Estonia (4), France (1), Ireland (3), Lithuania (2), Norway (4), Portugal (2), the United Kingdom (15), United States (9: California)
Total: 41 collections including 42 occurrences