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Protorthida
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Brachiopoda
Class:	Rhynchonellata
Order:	†Protorthida
Families
Superfamily Protorthoidea Protorthidae Arctohedridae Leioriidae Superfamily Skenidioidea Skenidiidae

Protorthida is an extinct order of Rhynchonellate brachiopods containing the taxa:

• Superfamily Protorthoidea
  • Family Protorthidae
  • Family Arctohedridae
  • Family Leioriidae
• Superfamily Skenidioidea
  • Family Skenidiidae

References

1. Williams, Alwyn; Brunton, C.H.C.; Carlson, S.J.; et al. (1997–2007). Kaesler, Roger L.; Selden, Paul (eds.). Part H, Brachiopoda (Revised). Treatise on Invertebrate Paleontology. Boulder, Colorado; Lawrence, Kansas: Geological Society of America; University of Kansas.

v t e Brachiopod orders
Linguliformea Lingulata †Acrotretida Lingulida †Siphonotretida †Paterinata Paterinida Craniiformea Craniata Craniida †Craniopsida †Trimerellida Rhynchonelliformea †Chileata Chileida Dictyonellida †Kutorginata Kutorginida †Obolellata Naukatida Obolellida Rhynchonellata †Athyridida †Atrypida †Orthida †Pentamerida †Protorthida Rhynchonellida †Spiriferida †Spiriferinida Terebratulida Thecideida †Strophomenata Billingsellida Orthotetida Productida Strophomenida

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