Rheocricotopus reduncus Saether & Schnell 1988

Rheocricotopus (s. str.) reduncus Saether & Schnell, 1988 Rheocricotopus (Rheocricotopus) reduncus Saether & Schnell, 1988: 66. Rheocricotopus (Rheocricotopus) reduncusoides Namayandeh & Beresford, 2018: 22. Syn. nov. Rheocricotopus (Rheocricotopus) reduncus – Saether et al. 2000: 161. — Makarchenko & Makarchenko 2005: 134. — Ashe & O’Connor 2012: 572. Type material Holotype NORWAY – Sogn & Fjordane • ♂; Luster, Jostedøla River at inlet to small lake; 23 July 1986; A. Fjellheim and Ø.A. Schnell leg.; ZMB [No.116]. Type specimens of R. (s. str.) reduncus and R. (s. str.) reduncusoides were not examined. Distribution To date, the species is known from North Europe and the Russian Far East in the Palaearctic region, and Canada in the Nearctic region. Remarks Originally, the species was described based on males and pupae from Norway by Saether & Schnell (1988: 66). Later, Makarchenko & Makarchenko (2005: 134) briefly redescribed a male from Sakhalin Island in the Russian Far East. The features are nearly consistent with those of the Norwegian material, although the antennal ratio is somewhat high (ca 1.2 in the Russian material vs 0.83–0.90 in the Norwegian material), but this is likely to fall within geographical variation. Rheocricotopus (R.) reduncusoides Namayandeh & Beresford, 2018 was described based on males from Canada. The authors separated it from R. (s. str.) reduncus by some measurement and count data, and the shapes of superior volsella, inferior volsella and sternapodeme. Mensural data look like individual variations, and the slight differences in the hypopygium may be individual variations, but also related to orientation or pressure from the coverslip. Although the immature stages are unknown, the species is a junior synonym of R. (s. str.) reduncus Saether & Schnell, 1988. The female and the larva are unknown.