Phanoperla menglunensis Du, Zeng & Huo 2025, sp. nov.

Phanoperla menglunensis, Du, Zeng & Huo, sp. nov. Fig. 1–2 Adult habitus. Head yellowish; fronto-clypeal area yellowish, biocellate, ocelli large and separated by half their diameter; occipital suture distinct, and the M line prominent. Basal section of antennae yellow, transitioning to a blackish-brown towards the apex. Palpi pale brown. Pronotum brown and rectangular, posterior narrower than anterior. Legs yellow-brown with brown on proximal of tarsus; wings hyaline, veins pale brown (Fig. 1). Male. Length of body 11 mm; terga 1–8 simple; the middle of tergum 9 features a membranous dimple, both sides emarginate and adorned with a round patch of sensilla basiconica. Additionally, there is a patch of sensilla basiconica in the central membranous area; the hemitergal processes of tergum 10 are strongly sclerotized with a sharp tip that curves outward and a stout base (Fig. 1). The penis tube is short and robust, featuring a transverse, wide band of sclerite on the dorsal side of the proximal end (Fig. 2). The sclerite is more pronounced on both sides than in the center. In the middle of the sclerite band, extremely fine granules are present. A longitudinal strip of sclerite extends from the central inner area towards the base, giving the dorsal sclerite of the penis tube a slight "T" shape. The endophallus is membranous and short, with a rounded, wide terminal end on the dorsal side. The ventral surface of the endophallus is prominent, featuring a cluster of large black spines in the center, along with a row of large black spines on either side. Smaller spines are present above and below the central large black spine, as well as above the large spines on either side. Female. unknown. Type material. Holotype: male (ICYZU), Menglun, Mengla County, Xishuangbanna Dai Autonomous Prefecture, Yunnan Province, China, 21.9349°N, 101.2481°E, 1994.IV.19, leg. Yinglun Wang, Rungang Tian. Distribution. China (Yunnan) Etymology. The specific name refers to the type locality, Menglun. Remarks. The new species is closely related to P. vietnamensis Zwick, 1986 (see fig. 5 in Wang et al, 2022), but exhibits distinct characteristics in the endophallus. In P. menglunensis sp. nov., smaller spines are located above and below the central large black spines, as well as above the large spines on either side. In contrast, P. vietnamensis features a dorsobasal finger-shaped lobe and a U-shaped patch of hooks on the endophallus, which is visible ventrally.