Traits taxon details
original description
Lazarev, S. S.; Carter, J. L. (2000). New Atokan productoid brachiopods from the Upper Carboniferous Ladrones Limestone of southeastern Alaska, with a preliminary note on the phylogeny and classification of the Tribe Retariini. <em>Annals of Carnegie Museum.</em> 69(1): 11-21. [details]
taxonomy source
Waterhouse, J. B. (2013). The evolution and classification of Productida. <em>Earthwise.</em> 10: 1-537. note: See p. 314. [details]
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