Traits taxon details
original description
(of Mrassiella umbonata Benediktova, 1959 †) Benediktova, R. N. (1959). Plastinchatozhabernyye mollyuski promezhutochnoy podsvity Kemerovskogo rayona Kuzbassa [Lamellibranchiate mollusks of the intermediate subformation of the Kemerovo district of Kuzbass]. <em>Izvestiya Tomskogo ordena Trudovogo Krasnogo Znameni politekhnicheskogo instituta imeni S. M. Kirova.</em> 99: 115-126. page(s): 123, pl. 1, fig. 12 [details] Available for editors 
basis of record
Betekhtina O.A. (1974). Biostratigrafiya i korrelyatsiya uglenosnykh otlozhenii pozdnego paleozoya po nemorskim dvustvorkam (Biostratigraphy and Correlation of the Carboniferous Beds of the Late Paleozoic Based on Nonmarine Bivalves). <em>Novosibirsk, Nauka Publishers.</em> 181 p. [in Russian]. page(s): 132, pl. 16, fig. 8 [details] Available for editors 
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