Ussuniidae

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]

Ussuniidae
Temporal range: Ordovician[1] (Llandeilo–lower Caradoc)
Scientific classification
Kingdom: Animalia
Clade: Lophophorata
Phylum: Brachiopoda
Class: Craniata
Order: †Trimerellida
Superfamily: †Trimerelloidea
Family: †Ussuniidae
Genera

Ussunia

References
  1. Williams, Alwyn; Carlson, S.J.; Brunton, C.H.C.; Holmer, L.E.; Popov, L.E.; Mergl, M.; Laurie, J.R.; Bassett, M.G.; Cocks, L.R.M.; Rong, J.-Y.; et al. (2000). Paul Selden (ed.). "Part H, Brachiopoda. Linguliformea, Craniiformea, and Rhynchonelliformea". Treatise on Invertebrate Paleontology. Geological Society of America.
  2. 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.
  3. Williams, Alwyn; Carlson, S.J.; Brunton, C.H.C.; Holmer, L.E.; Popov, L.E.; Mergl, M.; Laurie, J.R.; Bassett, M.G.; Cocks, L.R.M.; Rong, J.-Y.; et al. (2000). Paul Selden (ed.). "Part H, Brachiopoda. Linguliformea, Craniiformea, and Rhynchonelliformea". Treatise on Invertebrate Paleontology. Geological Society of America.
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