| Ussuniidae Temporal range:
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|---|---|
Scientific classification 
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| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Brachiopoda |
| Class: | Craniata |
| Order: | †Trimerellida |
| Superfamily: | †Trimerelloidea |
| Family: | †Ussuniidae |
| Genera | |
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Ussunia | |
Ussuniidae is a monogeneric family of Ordovician brachiopods aligned with the Trimerellids, but showing additional similarities to the craniids and considered intermediate in morphology.[2][3]
- ^ 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.
- ^ Gorjansky, Wladimir; Popov, Leonid (July 1986). "On the origin systematic position of the calcareous-shelled inarticulate brachiopods". Lethaia. 19 (3): 233–240. doi:10.1111/j.1502-3931.1986.tb00737.x.
- ^ 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.