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The revision of the type collections on the genus Pseudorhaptagnostus Lermontova, 1940 has shown the validity of the type species. Originally indicated type species P. simplex Lermontova, 1951 appeared to be erroneously combination of cephala and pygidia from different species; recombined set of cephala and pygidia for P. simplex synonymized it with P. punctatus Lermontova, 1940, and therefore renamed...
The validity of Eurudagnostus Lermontova, 1951 was confirmed by reexamination of the collection from the Boshe-Kul’ core. The diagnoses of genera of Agnostidae were reviewed, and Eurudagnostus falls well within the concept of the family Agnostidae. The diagnostic features of Eurudagnostus include a delicate border furrows, the transglabellar furrow bent posteriad or straight, short pygidial axis,...
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