Epeorus (Caucasiron) insularis (Braasch, 1983) Figs 30, 31, 32

Iron znojkoi insularis Braasch, 1983

Epeorus (Caucasiron) insularis (Braasch, 1983); in Hrivniak et al. (2020b)

Type locality.

Greece, Samos Island, stream east of Pirgos, 37°3'N / 26°49'E; 300 m a.s.l.

Distribution.

Known only from few sites in Samos Island (Fig. 30).

Habitat.

Larvae inhabit small forested streams at 128-440 m a.s.l. (Fig. 30).

Main morphological diagnostics of larvae.

(i) abdominal terga V-VII with T-shaped medial macula (Fig. 31I); (ii) abdominal sterna V-VII with reddish to brownish longitudinal stripe (Fig. 31B, J); (iii) tergum X without postero-lateral projections (Fig. 32J); (iv) gill plates VII (in natural position from ventral view) narrow (Figs 31K, 32H, I); (v) gill plates III with well-developed projection (Fig. 32G); (vi) setae on abdominal terga hair-like (Fig. 32E); (vii) denticles along posterior margin of tergum VII relatively short and poorly sclerotized (Fig. 32E).

Remarks.

Morphology. Coloration of abdominal terga and sterna as in E. (C.) znojkoi s.l. (Fig. 7N-P).

Taxonomy. This species was described by Braasch (1983) based on imagines as a subspecies of E. (C.) znojkoi . Elevated to species level in Hrivniak et al. (2020b) based on a phylogenetic analysis of all Caucasian Epeorus (Caucasiron) species. The type series is currently deposited in SMNS.