Pagastia (P.) aff. lanceolata (Tokunaga, 1936), 1959

Makarchenko, Eugenyi A., Semenchenko, Alexander A. & Palatov, Dmitry M., 2021, New species and findings of Pagastia Oliver (Diptera: Chironomidae: Diamesinae) from Central Asia, with DNA barcoding of known species of the genus, Zootaxa 4951 (3), pp. 559-570 : 566-567

Pagastia (P.) aff. lanceolata (Tokunaga, 1936)

Material. 1 larva, Central Asia, Tajikistan, Gorno-Badakhshan Autonomous Region, Shughnon District , Tuzumtaikul River within the Jelondy village , about 400 m above the mouth, alt. 3560 m above sea level, 01.VII.2016, N 37°34’26.56”, E 72°34’48.29”, leg. D. Palatov ; 2 larvae, the same region, Rushanskiy District, spring in front of the mouth of the Bartang River, near the bridge to Rushan Town . 03.VII.2016, alt. 2025 m above sea level, N 37°55.493’, E 71°36.183’, leg. D. Palatov.

Remarks. The larvae collected in mountain river and spring of Pamir do not differ in morological character- istics from P. (P.) lanceolata (Tokunaga) , but molecular genetic data allow us to assert about an independent and possibly new species of Pagastia ( Fig. 16 ).

Ecology. Larvae were collected from stones and bowlders covered with moss in mountain river, located at an altitude of 3569 m, at a flow rate of 0.3–1.0 m/s, with water temperature 5°C and in spring from stones covered with algae, at an altitude of 2025 m, at a flow rate of 0.2–0.5 m /s.

Distribution. Known only from one river and spring in Pamir Mountains ( Tajikistan) ( Figs. 14–15 ).

Figures

FIGURE 16. Bayesian tree based on mitochondrial COI and COII genes for available members of the genus Pagastia Oliver with Pseudodiamesa stackelbergi (Goetghebuer) as outgroup. Bayesian posterior probabilities (PP) are given above tree nodes and bootstrap support values found in the ML analysis are shown below nodes.

FIGURES 12–15. Type localities of Pagastia (P.) caelestomontana sp. nov. (12), P. (P.) hanseni sp. nov. (13), and P. (P.) aff. lanceolata (Tokunaga) (14–15). 12, Otmek River, Talas district, Kirgizstan (photo by E.S. Chertoprud); 13, Soktosh River, Gorno-Badakhshan Autonomous Region, Roshtqal’a District, Tajikistan (photo by D.M. Palatov); 14, Tuzumtaikul River, Gorno- Badakhshan Autonomous Region, Shughnon District, Tajikistan (photo by M.V. Vinarski); 15, spring in front of the mouth of the Bartang River, Gorno-Badakhshan Autonomous Region, Rushanskiy District, Tajikistan (photo by M.V. Vinarski).