Traits taxon details
original description
Frederiks, G. N. (1924). Paleontologicheskie etyudy. 2 verkhnekamennougol'nykh spiriferidakh Urala (Palaeontological studies - 2. On Upper Carboniferous spiriferids of the Urals). <em>Izv. Geol. Kom.</em> 38(3): 295-324. [details]
basis of record
Angiolini, L.; Brunton, H.; Gaetani, M. (2005). Early Permian (Asselian) brachiopods from Karakorum (Pakistan) and their palaeobiogeographical significance. <em>Palaeontology.</em> 48(1): 69-86., available online at https://doi.org/10.1111/j.1475-4983.2004.00439.x [details]
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