Rhopalopsole dulongjianga Yang & Du 2024, sp. nov.

Rhopalopsole dulongjianga Yang & Du sp. nov. Materials Type status: Holotype. Occurrence: recordedBy: Yang Xiao and Zeng Liang-Liang; sex: male; lifeStage: adult; occurrenceStatus: present; occurrenceID: 1DC7F786-9DFF-5643-AA72-A7FEE8FDBBD7; Taxon: scientificName: Rhopalopsole dulongjianga; class: insecta; order: Plecoptera; family: Leuctridae; genus: Rhopalopsole; specificEpithet: dulongjianga; Location: stateProvince: Yunnan; county: Nujiang Lisu Autonomous Prefecture; locality: Dulongjiang town; minimumElevationInMeters: 1397; maximumElevationInMeters: 1397; decimalLatitude: 27.841533; decimalLongitude: 98.328782; Event: year: 2024; month: 6; day: 4; Record Level: institutionID: ICYZU Description Male. Body length 5.7 mm. Fore-wings length 5.5 mm, hind-wings length 4.2 mm. Head dark brown, wider than pronotum; ocelli pale brown, antennae and palpi light brown. Pronotum brown, quadrate. Legs brown. Wings hyaline and veins light brown (Figs 1, 2). Tergum 9 mostly sclerotised, with the median pentagonal area being somewhat less sclerotised and featuring paired posterior process with sensilla basiconica. Sternum 9 basally with subcircular vesicle bearing dense hairs, apically with a comparatively longer subgenital plate. Tergum 10 bears a large central plate covered with a broad sensilla basiconica patch in the lower half and slightly sclerotised in the upper half. Transverse plates nearly triangular and have some setae. Lateral projections of tergum 10 gradually and regularly taper to a sharp, slightly upturned point. Epiproct thick at base, rod-like, with its tip narrowing and turned forwards. Subanal lobes long and upturned with distinct ventral flaps and longitudinal furrows covering the ventral surface. Cercus hairy and upcurved, with a small spine (Figs 2, 3). Female. Unknown. Egg and nymph. Unknown. Diagnosis Rhopalopsole dulongjianga is similar to menbers of the R. magnicerca group (Sivec et al. 2008). The new species closely resembles Rhopalopsole bispina (Wu, 1949), with both species sharing similar shapes of the epiproct and the central plate of tergum 10. In R. dulongjianga, the cercus is hairy and upcurved, with a small spine and tergum 9 is mostly sclerotised, somewhat less so in the median pentagonal area with a paired posterior process with sensilla basiconica. In contrast, R. bispina lacks a spine on the cerci and the hind border of tergum 9 features a band of knob-like ornamentations, narrowly connected in the middle and broadly expanded on each side. Etymology This new species is named after its collection site, Dulongjiang Town. Distribution China, Yunnan (Fig. 6).