Sperchon

Kolesnikov, Vasiliy B. & Stolbov, Vitaly A., 2025, Review of the genus Sperchon Kramer, 1877 (Acari, Hydrachnidia: Sperchontidae) from Russia, Zootaxa 5666 (1), pp. 53-73 : 55-57

Subgenus Sperchon s.s.

1. Sperchon (Sperchon) brevirostris Koenike, 1895

Distribution: European part: Kola Peninsula ( Sokolow, 1940; Shubina & Tsember, 2017); Komi Republic ( Shubina & Tsember, 2017).

2. Sperchon (Sperchon) fluviatilis Uchida, 1934

Distribution: Far East: Sakhalin ( Uchida, 1936b).

3. Sperchon (Sperchon) glandulosus Koenike, 1886

Distribution: European part: Leningrad region ( Sokolow, 1936; Sokolow & Jankovskaja, 1962); Kola Peninsula ( Sokolow, 1940; Shubina & Tsember, 2017), Moscow region ( Jankovskaja, 1964); Komi Republic ( Shubina & Tsember, 2017); Caucasus: North Ossetia ( Sokolow, 1927), Krasnodar region ( Sokolow, 1940); Western Siberia: Altai region ( Zhukova & Bezmaternykh, 2008; Stolbov, 2008); Khanty-Mansi Autonomous Okrug (Stolbov, 2024); Yamalo-Nenets Autonomous Okrug ( Stolbov et al., 2025); Eastern Siberia: Irkutsk region, Republic of Buryatia, Zabaykalsky region ( Semenchenko & Matafonov, 2014); Sakha Republic ( Semenchenko et al., 2010); Far East: Khabarovsk Krai (Sokolow, 1950); Primorsky Krai, Sakhalin ( Sokolow, 1940); Chukotka Peninsula ( Wainstein, 1976b); Magadan Region, Kamchatka ( Wainstein, 1981a); Jewish Autonomous Oblast ( Semenchenko, 2005); Amur Region (Semenchenko, 2010).

Notes. 1) A number of old references may probably refer to Sperchon thienemanni Koenike, 1907 , which was previously considered a variety of this species. 2) Sperchon glandulosus cubanicus Sokolow, 1940 occurs in the same samples as the nominative subspecies and requires re-examination, since its taxonomic status is not sufficiently defined.

4. Sperchon (Sperchon) kuluensis Tuzovskij, 1990

Distribution: Far East: Magadan region ( Tuzovskij, 2008).

5. Sperchon (Sperchon) kurilensis Uchida, 1936

Distribution: Far East: Kuril Islands ( Uchida, 1936a).

Note: The species was originally assigned to the subgenus Hispidosperchon . However, the description of this species does not indicate the presence of a reticulated structure of the integument (the main feature of Hispidosperchon ). Accodring to the description of Uchida, the integument has fine ridges. So very likely, this species belongs to Sperchon s.s. Also, it is impossible to determine the sex of the material from the description, which makes its identification difficult.

6. Sperchon (Sperchon) laurenticus Wainstein, 1981

Distribution: Western Siberia: Yamalo-Nenets Autonomous Okrug ( Stepanov, 2006; Stolbov e t al., 2025); Far East: Chukotka ( Wainstein, 1981a, b); Amur Region (Semenchenko, 2010).

7. Sperchon (Sperchon) minutiporus Sokolow, 1934

Distribution: European part: Komi Republic ( Shubina & Tsember, 2017); Far East: Primorsky Krai, Khabarovsk Krai ( Sokolow, 1940; Semenchenko, 2008a).

8. Sperchon (Sperchon) monticolus Wainstein, 1981

Distribution: Eastern Siberia: Sakha Republic ( Semenchenko et al., 2010); Far East: Magadan Region, Kamchatka ( Wainstein, 1981a, b).

9. Sperchon (Sperchon) monodentatus Tuzovskij, 1981

Distribution: Far East: Chukotka ( Tuzovskij, 1981)

10. Sperchon (Sperchon) orientalis Tuzovskij, 1990

Distribution: Eastern Siberia: Sakha Republic ( Semenchenko et al., 2010); Far East: Magadan Region, Chukotka, Kamchatka ( Tuzovskij, 2008), lower Amur basin ( Semenchenko, 2008a).

11. Sperchon (Sperchon) pesici Tuzovskij 2021

Distribution: Far East: Chukotka, Magadan region, Kamchatka ( Tuzovskij, 2021).

12. Sperchon (Sperchon) prosperoides Tuzovskij, 1990

Distribution: Far East: Magadan region ( Tuzovskij, 2008); Amur region (Semenchenko, 2010).

13. Sperchon (Sperchon) prosperus Wainstein, 1981

Distribution: Far East: Chukotka ( Wainstein, 1981a, b); Khabarovsk Krai ( Semenchenko, 2008c). 14. Sperchon (Sperchon) questor Wainstein, 1981

Distribution: Far East: Magadan region ( Wainstein, 1981a, b); lower Amur basin ( Semenchenko, 2008a). 15. Sperchon (Sperchon) resupinus Viets, 1922

Distribution: European part: Moscow ( Sokolow, 1940); Kola Peninsula, Komi Republic ( Shubina & Tsember, 2017).

16. Sperchon (Sperchon) squamosus Kramer, 1879

Distribution: European part: Leningrad region ( Sokolow, 1925; 1936), Karelian Isthmus (Sokolow & Jankovskaja, 1962); Komi Republic ( Shubina & Tsember, 2017); Sverdlovsk region ( Stolbov et al., 2024); Western Siberia: Khanty-Mansi Autonomous Okrug (Stolbov, 2024); Yamalo-Nenets Autonomous Okrug ( Stolbov et al., 2025).

17. Sperchon (Sperchon) similis Wainstein, 1981

Distribution: Western Siberia: Khanty-Mansi Autonomous Okrug (Stolbov, 2024); Far East: Chukotka ( Wainstein, 1981a, b).

18. Sperchon (Sperchon) termalis Wainstein, 1981

Distribution: Far East: Magadan region ( Wainstein, 1981a, b).

19. Sperchon (Sperchon) thienemanni Koenike, 1907

Syn.: Sperchon rugosus Koenike, 1911

Distribution: European part: Leningrad region ( Sokolow, 1936); Komi Republic ( Shubina & Tsember, 2017).

Note: Previously considered a form of S. glandulosus , so some older references may refer to this species. 20. Sperchon (Sperchon) tridentatus Sokolow, 1940

Distribution: European part: Komi Republic ( Tuzovskij, 2006; Shubina & Tsember, 2017); Western Siberia: Khanty-Mansi Autonomous Okrug (Stolbov, 2024); Altai Republic ( Sokolow, 1940); Eastern Siberia: Sakha Republic ( Semenchenko et al., 2010); Far East: Chukotka, Kamchatka, Wrangel Island ( Wainstein, 1981a); Khabarovsk Krai ( Semenchenko, 2008a); Amur Region (Semenchenko, 2010).

21. Sperchon (Sperchon) turgidus Viets, 1914

Distribution: European part: Leningrad region ( Sokolow, 1936); Komi Republic ( Shubina & Tsember, 2017). 22. Sperchon (Sperchon) uralensis sp. nov.

Distribution: Western Siberia: Khanty-Mansi Autonomous Okrug.

Note: The description is given below.

23. Sperchon (Sperchon) ussuriensis Tuzovskij, 2002

Distribution: Far East: Primorsky Krai ( Tuzovskij, 2002).

24. Sperchon (Sperchon) zhavoronkovae sp. nov.

Distribution: Western Siberia: Khanty-Mansi Autonomous Okrug.

Note: The description is given below.