Parameletus chelifer Bengtsson 1908

• Main Author: Tiunova, Tatiana M.
• Format: Other/Unknown Material
• Language: unknown
• Published: Zenodo 2008
• Subjects: Biodiversity; Taxonomy; Animalia; Arthropoda; Insecta; Ephemeroptera; Siphlonuridae; Parameletus; Parameletus chelifer; Yakutia
• Online Access: https://doi.org/10.5281/zenodo.6232548; http://treatment.plazi.org/id/406B87811351FFF8FF6FF9780A9AFBA8

Parameletus chelifer Bengtsson 1908 (Figs. 16–23) Eatonia borealis Bengtsson, 1904:131, nomen nudum. Parameletus chelifer Bengtsson, 1908:242. Sparrea norvegica Esben-Petersen, 1909:554. Potameis elegans Bengtsson, 1909:15. Palmenia fennica Aro, 1910:31. Material examined. RUSSIA . Southern Yakutia : Ungra River Basin, Yuhktinka stream, mouth, light tributary of Yuhkta River, 30.VII 2006, T. Tiunova, 14 male imagines, 3 female imagines. Amurskaya Oblast’ : Zeya Reservoir’s Basin, Artemii River, 50 m lower motor-car bridge, line Zeya-Verhknezeisk Town, 21.VI 2004, T Tiunova, 17 larvae; Zeya Reservoir’s Basin, Giluy River, near river crossing, 19.VI 2004, T Tiunova, 1 male imago (reared from nymph); Amur River Basin, upper part of Talali River, 25.VIII 2004, T Tiunova, 20 male imagines, 13 female imagines. Khabarovskiy Kray : Priochot’e, Ul’ya River Basin, Khetana River, 7 km upper mouth, 22.VII 1985, V Zherikhin, 1 male imago; same place, 11–17.VIII 1985. V Zherikhin, 5 male imagines, 6 female imagines; Ayano-Majskiy Region, Ujka River Basin, stream, 300 m upper mouth, left tributary of Uika River, near airport, 23.VII 1989, T Tiunova, 6 male imagines (reared from nymph). Primorskiy Kray: Ussuri River Basin, Otkosnaya River, left tributary of Ussuri River, lower motor-car bridge, 16.VI 1998, T Tiunova, 1 male imago. Male imago. Dimensions: length (mm): body 12.8–15.0; fore wings 12.0–13.1; cerci 17.2–22.4. Total color of living imago dark brown. Head : upper portion of eyes light brown or light gray. Thorax: medioscutum and submedioscutum brown; sublateroscutum and posterior scutal protuberance dark brown (Fig. 23); mesosternum from dark brown to dark. Fore legs brown, middle and hind legs from light brown to yellowish. Length (mm) of foreleg segments: femora 2.7–3.1; tibia 2.4–2.7; tarsal segments 1.4–1.7, 1.5–1.9, 1.6–1.9, 1.3–1.6, 0.8–1.0. The ratio of length to the maximal width for fore wing—2.40 (Fig. 20), hind wing—1.47 (Fig. 21). Abdomen: terga 2–9 opaque with pair of elongated dark brown spots in middle ...