| Protorthida | |
|---|---|
| Scientific classification  | |
| Domain: | Eukaryota | 
| Kingdom: | Animalia | 
| Phylum: | Brachiopoda | 
| Class: | Rhynchonellata | 
| Order: | †Protorthida | 
| Families | |
| 
 | |
Protorthida is an extinct order of Rhynchonellate brachiopods containing the taxa:[1]
- Superfamily Protorthoidea
- Family Protorthidae
- Family Arctohedridae
- Family Leioriidae
 
- Superfamily Skenidioidea
- Family Skenidiidae
 
References
- ↑ 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.
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