Neoperla latamaculata Du 2005

Neoperla latamaculata Du, 2005 Figures 3–5 Neoperla latamaculata Du, 2005 in Du & Sivec, 2005: 48, 49. Li, Wang & Lu, 2011: 57. Yang & Li, 2018: 41. Zwick, 2023: 121. Male. General color brown. Head mostly orange with triangular darker area covering ocelli and triangular dark area anterior to M-line, area around compound eyes pale; compound eyes black; antennae brown to dark brown. The pronotum is wider anteriorly with pointed anterior and rounded posterior angles, rugosities and a darkened midline mark the middle third of the pronotum with a diffuse stripe. Antennae and palpi yellow brown; wing membrane subhyaline, veins brown; legs pale to yellowish brown, femorotibial joint dark brown. Body length 17–19 mm (n=3). Terga 1–6 unmodified. Tergum 7 with posterior margin slightly extended into a subquadrate process, covered with sensilla basiconica. Tergum 8 possesses a slender, erect, and recurved medial tongue-like process, which is adorned with sensilla basiconica. Hemitergal processes of tergum 10 sclerotized and slightly bent ventrally at middle. The penis tube is plump, featuring a sclerotized patch on the dorsal surface that extends to the tip, with paired spiny lobes on the ventral surface near the apex. The base of the endophallus features a V-shaped spine patch on the dorsal surface, with a larger spine patch in the middle. Near the proximal end, a hump is present on the dorsal surface. A row of spines extends from the ventral surface, running from the middle to the tip, with fine spines scattered along the posterior half. Female, egg, larva. Unknown. Material examined. Holotype (ICYZU), China: Shaanxi Province, Ningshaan County, Pingheliang National Nature Reserve, 1989.VII.20, leg Aierkens. 3 males (ICYZU), China: Chongqing, Wuxi County, Yintiaoling National Nature Reserve, Linkouzi Management Station, 1269 m, 2024.VII.21, leg Luyu Wang, Zhisheng Zhang. Distribution. China (Chongqing, Hubei, Shaanxi) Remarks. This morphological description of this species is brief and available only in Chinese; and the original illustrations are somewhat blurry. We examined the holotype as well as recently collected specimens from Chongqing (Fig. 3). Due to nearly 35 years of preservation in alcohol, many features of the holotype have become less distinct. In contrast, we photographed the adult male penis of a specimen collected in Chongqing, which was better preserved. Herein, we present novel, clear color images to aid accurate identification in the future. (Figs. 4–5).