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Belogurov, O. I. and Kartavtseva, I. V. (1975). Diagnoses of the Genera Parascolaimus, Parodontophora, Synodontium, Synodontoides of the Subfamily Axonolaiminae with the Description of Some Far Eastern Species. Zoologicheskii Zhurnal, 54(9): 1284-1292.