Traits name details
original description
(of ) Murchison, R. I.; de Verneuil, É.; de Keyserling, A. (1845). Géologie de la Russie, d'Europe et des Montagnes de l'Oural. Vol. II. Troisième partie. Paléontologie. John Murray, Londres & Bertrand, Paris, xxxii + 512 pp. + 43 pls., available online at https://gallica.bnf.fr/ark:/12148/bpt6k97251z/f3.item page(s): 307, pl. 21, fig. 9 [details]
basis of record
Branson, C. C. (1948). Bibliographic Index of Permian Invertebrates. <em>Geological Society of America, Memoirs.</em> 26: 1-1049., available online at https://books.google.com/books?id=2n-XQkmXU7MC page(s): 643 [details]
additional source
Maslennikov, D. F. (1935). Verkhne-permskiye plastinchatozhabernyye severnogo kraya [The Upper Permian pelecypods of the northern region]. <em>Trudy Tsentral'nogo nauchno-issledovatel'skogo geologo-razvedochnogo instituta (TsNIGRI).</em> 29: 1-124, pls. 1-6. page(s): 34 [details] Available for editors 
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