Traits name details
original description
Amalitzky, W. (1892). Ueber die Anthracosien der Permformation Russlands. <em>Palaeontographica.</em> 39: 125–212., available online at https://www.biodiversitylibrary.org/page/33297224 page(s): 150-151, pl. 19, fig. 16 [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): 36 [details] Available for editors 
additional source
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]
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