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The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.



a genus of freshwater fishes of the family Cyprinidae. There are three species, distributed in mountain waters of Middle and Central Asia. Two species are found in the USSR. The scaly osman (Diptychus maculatus), which inhabits high-mountain streams, is up to 50 cm long and weighs up to 1 kg. It feeds on vegetation and invertebrates. The fish spawns in the spring and summer. Its dwarf form, D. maculatus morpha sewerzow, does not exceed 25 cm in length and weighs less than 200 g. The naked osman (D. dybowskii) is found in mountain rivers and lakes. There are two forms: one inhabits rivers, and the other lakes. The naked osman is up to 60 cm long and weighs up to 3 kg. It is most abundant in Lake Issyk-Kul’, where it is a commercial fish.

Fishes of the genus Oreoleuciscus are sometimes called osmans or Altai osmans.


Zhizn’ zhivotnykh, vol. 4. part 1. Moscow, 1971.
Nikol’skii, G. V. Chastnaia ikhtiologiia, 3rd ed. Moscow, 1971.
The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.
References in periodicals archive ?
dybowskii, as well as other four schizothoracine fishes (Aspiorhynchus laticeps, Diptychus maculates, Schizothorax biddulphi and S.
A total of 65 individuals from 48 published sub species mitochondrial genomes that represented 10 genera (Oxygymnocypris, Platypharodon, Chuanchia, Gymnocypris, Schizopygopsis, Diptychus, Gymnodiptychus, Ptychobarbus, Aspiorhynchus and Schizothorax) and 6 out-group taxa (Barbus barbus, Barbus pobeguini, Barbus eburneensis, Barbus hulstaerti, Barbus trimaculatus and Barbus fasciolatus) were assembled to investigate the phylogenetic relationships of Schizothoracinae subfamily (Fig.
dybowskii, with Diptychus maculates placing outside of them.
Complete mitochondrial genome of Diptychus maculatus (Cypriniformes: Cyprinidae: Schizothoracinae).
geminata (394), Xerosaprinus diptychus (Marseul, 1855) (331), Dermestes maculatus De Geer, 1774 (330), Philonthus sp.
diptychus (331), in the dry season (96.1%) (Table 2).
diptychus and five species of Euspilotus on pig carcasses in a different kind of arid environment, in San Juan, Argentina.
diptychus showed to be strongly influenced by the dry season, since 96.1% of the specimens were collected during that period.