English: Hypoperlida: (a-d), Hypoperla elegans Martynov, 1928: (a) Holotype PIN 2050/17 (Late Permian, Soyana River, Archangelsk Region, Russia), photograph of forewing venation (scale bar represents 2 mm); (b), PIN No. 3353/415 (Late Permian, Soyana River, Archangelsk Region, Russia), photograph of body with fore- and hindwings venation, specimen. (c), PIN No. 117/968 (Late Permian, Soyana River, Archangelsk Region, Russia), photograph of forewing, specimen; (d), PIN No. 3353/471 (Late Permian, Soyana River, Archangelsk Region, Russia), photograph of hindwing, specimen. e-j ‘Idelopsocus’ sp., (e) ‘Idelopsocus’ cf. splendens, PIN 1700/3298, photograph of habitus; (f) Idelopsocus sp., PIN 1700–3257 (Early Permian, Tshekarda, Russia), habitus in dorsal view; (g) Idelopsocus sp., PIN 124–118 (Early Permian, Tshekarda, Russia), habitus in lateral view; (h) Idelopsocus sp., PIN 1700/479 (Early Permian, Tshekarda, Russia), habitus in dorsolateral view; (i) PIN 1700/3298 (Early Permian, Tshekarda, Russia) lateral view of head with maxillary palps; (j) ‘Idelopsocus’ splendens PU 2/129 (Early Permian, Tshekarda, Russia), apex of abdomen with one segmented cerci (scale bars represent a, c, d, f-h = 2 mm, b, e = 5 mm, i, j = 0,5 mm). Abbreviations: ce – cerci, mp – maxillary palps, pt – pterostigma