Epeorus (Caucasiron) shargi Hrivniak & Sroka, 2020 Figs 42, 43, 44

Type locality.

Iran, Golestan Province, Shirinabad village, unnamed river; 36°48'01.44"N / 55°01'05.78"E (locality no. 108); 740 m a.s.l.

Distribution.

Northern Iran. Known only from three sites in the eastern Alborz (Fig. 42).

Habitat.

Larvae inhabit streams at middle altitude, 740-1450 m a.s.l. (Fig. 42).

Main morphological diagnostics of larvae.

(i) abdominal terga V-VII with triangular or T-shaped medial macula (Fig. 43I-K); (ii) abdominal sterna without coloration pattern (Fig. 43B, L); (iii) tergum X without postero-lateral projections (Fig. 44J); (iv) femora with medial hypodermal spot (Fig. 43F-H); (v) gill plates VII (in natural position from ventral view) wide (Figs 43M, 44H, I); (vi) setae on abdominal terga hair-like (Fig. 44E); (vii) gill plates III with well-developed projection (Fig. 44G); (viii) shape of head of male oval trapezoidal (Fig. 43D).

Remarks.

Taxonomy. This species was described based on larvae collected from Alborz Mts. (Hrivniak et al. 2020a). Imagines not described. The type series is currently deposited in SMNS, IECA, and MMTT_DOE.