Sperchon (Hispidosperchon) setiger Thor 1898

Sperchon (Hispidosperchon) setiger Thor, 1898 (Figs 8– 10, 11E,F) Material examined. Three females, Russia, Yaroslavl region, Kutma River, 24.11.2024, leg. V. Kolesnikov; one female, Russia, Sverdlovsk Region, Balda River, 04.10.2020, leg. V. Stolbov (COX1 sequence: OL343041). Diagnosis. Integument reticulated, with numerous folds. Glandularia platelets of dorsum not enlarged, dorsum with small muscle attachment plates (Dc-2-4 and Dl-1-4). Cx-I+II separated, Cx-III without glandular opening, Cxgl-4 is the only seta between Cx-IV and genital plates. Venter with muscle attachment platelets. Acetabula 1 and 2 elongated, close to each other. Excretory pore without sclerotized ring, located close to Vgl-3. P-2 not shortened or widened, with a pointed distoventral projection with three distal short setae, ventral spiniform seta absent. P-3 with four spiniform ventral setae. Ventral peg-like seta on P-4 small. P-5 short. IV-L-3-5 with few, simple dorsal setae.