Published January 31, 2025 | Version v1
Taxonomic treatment Open

Schizopygopsis sewerzowi Herzenstein 1891

Description

Schizopygopsis sewerzowi Herzenstein, 1891

Schizopygopsis sewerzowi Herzenstein, 1891: 196. Type locality: Lake Bulunkul and Karasu River, Amu Darya basin, Pamir mountains.

REFERENCES FOR TAJIKISTAN: Schizopygopsis stoliczkae — Berg (1905: 106; 1949: 730): upstream Amu Darya (Kara-Su, Alichur Rivers, Lakes Bulunkul, Karakul). Schizopygopsis sewerzowi — Berg (1905: 107), Shaposhnikova (1950: map): (upstream Amu Darya, inhabit together with Schizopygopsis stoliczkae). Schizopygopsis stoliczkai — Nikolskiy (1938: 131), Shaposhnikova (1950: map): mountain part of Amu Darya basin, Pamir. Schizopygopsis stoliczkai infraspecies sewerzowi Berg (1949: 731): Pamir part of Amu Darya basin.

DISTRIBUTION IN TAJIKISTAN: Pamir region of Amu Darya basin (localities 40–44, 47–49).

CONSERVATION STATUS IN TAJIKISTAN: Not known; not known (sensu IUCN; Freyhof et al., 2022).

SPECIMENS EXAMINED: IBIW_FS (n = 41) (Artaev et al., 2024). FMNH: 145623, 145625, 145626, 145628, 145629, 145631–33, 145635, 145640, 145643, 145646.

COMMENTS: Nikolskiy (1938) suggested that the difference between main diagnostic characters (eye size and body height) of Schizopygopsis stoliczkai and Schizopygopsis sewerzowi is insufficient to classify them as a different species. Our genetic data confirm the validity of S. sewerzowi. In particular, samples from the Pamir region (GenBank acc. nos. PP993467–68) differ (p -distance = 1.3%) from samples of S. stoliczkai from its type basin, the Indus River (KY032326, 1118 bp), in cytochrome b sequence. In addition, Schizopygopsis sewerzowi is known to have up to four trophic ecomorphs in young Pamir lakes (e.g., Yashilkul) that are divergent in mouth types and feeding modes (Savvaitova et al., 1988; Komarova et al., 2021). It is still unknown whether sympatric ecomorphs are genetically differentiated or not.

Notes

Published as part of Artaev, Oleg, Thoni, Ryan, Mirzoev, Nuriddin & Levin, Boris, 2025, Ichthyofauna of Tajikistan: Diversity and Changes over the Past Century, pp. 1-56 in American Museum Novitates 2025 (4032) on page 14, DOI: 10.1206/4032.1, http://zenodo.org/record/20514623

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Linked records

Additional details

Biodiversity

References

  • Herzenstein, S. M. 1891. Fische. Wissenschaftliche Resultate der von N. M. Przewalski nach Central- Asien unternommenen Reisen. Zoologischer Theil St. Petersburg 3: 181-262.
  • Berg, L. S. 1905. Die Fische von Turkestan. Saint Petersburg: print. of Isidor Goldberg. [in Russian]
  • Berg, L. S. 1949. Freshwater fish of the USSR and neighboring countries (3 vols). Moscow-Leningrad: Izdatelstvo Akademii nauk SSSR. [in Russian]
  • Freyhof, J., M. Rafique, and, A. Daniels. 2022. Schizopygopsis stolickai. The IUCN Red List of Threatened Species 2022. Internet resource (https://dx.doi.org/10.2305/IUCN.UK.2022-1.RLTS.T19450404A19849085.en), accessed August 24, 2024.
  • Artaev, O., B. Levin, R. Thoni, N. Mirzoev. 2024. Fish occurrence in Tajikistan. Papanin Institute for Biology of Inland Waters Russian Academy of Sciences. Occurrence dataset (https://doi.org/10.15468/d7h489), accessed via GBIF. org March 7, 2024.
  • Komarova, A. S., O. L. Rozanova, and B. A. Levin. 2021. Trophic resource partitioning by sympatric ecomorphs of Schizopygopsis (Cyprinidae) in a young Pamir Mountain lake: preliminary results. Ichthyological Research 68: 191-197.