taxonID	type	description	language	source
D52787B0FFC0FF98FF7EFE47FA8D6EBA.taxon	description	Male. The coloration is generally yellow-brown (Figs. 1 A, 1 C), with a dark brown ocellar patch and a light brown nearly trapezoidal patch located anterior of the M-line (Fig. 1 B). The distance between the ocelli is greater than the diameter of a single ocellus. Antennae yellow-brown, palpi light brown. The pronotum is trapezoidal, with its posterior portion being slightly narrower than the anterior portion. legs pale to yellowish brown. Wings subhyaline, veins light brown (Fig. 1 A). Forewing length 17.0 – 18.0 mm, body length 14.0 – 15.5 mm (n = 2). Tergum 6 has a small medial patch of sensilla basiconica. Tergum 7 has a small medial patch of sensilla basiconica (Fig. 1 C). Tergum 8 has a large medial area with sparse sensilla basiconica; sclerotized posteriorly, featuring an elevated brown sclerite (Fig. 1 C). Tergum 9 sclerotized laterally with a large medial membranous area; a weakly sclerotized spot bearing setae is present within membranous region (Fig. 1 C). The hemitergal processes of tergum 10 are acute, finger-like, and curved inward, with a rounded basal callus (Fig. 1 C). A pair of membranous lobes present at the distal end of the dorsal surface of the penis tube (Fig. 2 A); a dark sclerotized patch present at the base of the ventral surface (Fig. 2 B). The endophallus is densely covered with small spines, except for an arrow-shaped, spine-free area dorsally (Fig. 2 A) ’ distal 1 / 3 curves ventrally (Figs. 2 B – C) and at the point of curvature there is a noticeable projection on the ventral surface that is densely covered with small spines (Fig. 2 C). Female. unknown.	en	Zeng, Liang-Liang, Huo, Qing-Bo, Du, Yu-Zhou (2025): A new species of Tyloperla (Plecoptera: Perlidae) from China, with a supplementary description of T. bimaculata Li & Kong, 2020. Zootaxa 5661 (4): 567-572, DOI: 10.11646/zootaxa.5661.4.7, URL: http://dx.doi.org/10.11646/zootaxa.5360.3.8
D52787B0FFC0FF98FF7EFE47FA8D6EBA.taxon	materials_examined	Type material. Holotype: 1 male (ICYZU), China: Chongqing, Wuxi County, Yintiaoling National Nature Reserve, Linkouzi, 1285 m, 2022. VI. 21, leg Luyu Wang, Zhisheng Zhang. Paratype: 1 male (ICYZU), same data as holotype.	en	Zeng, Liang-Liang, Huo, Qing-Bo, Du, Yu-Zhou (2025): A new species of Tyloperla (Plecoptera: Perlidae) from China, with a supplementary description of T. bimaculata Li & Kong, 2020. Zootaxa 5661 (4): 567-572, DOI: 10.11646/zootaxa.5661.4.7, URL: http://dx.doi.org/10.11646/zootaxa.5360.3.8
D52787B0FFC0FF98FF7EFE47FA8D6EBA.taxon	distribution	Distribution. China (Chongqing)	en	Zeng, Liang-Liang, Huo, Qing-Bo, Du, Yu-Zhou (2025): A new species of Tyloperla (Plecoptera: Perlidae) from China, with a supplementary description of T. bimaculata Li & Kong, 2020. Zootaxa 5661 (4): 567-572, DOI: 10.11646/zootaxa.5661.4.7, URL: http://dx.doi.org/10.11646/zootaxa.5360.3.8
D52787B0FFC0FF98FF7EFE47FA8D6EBA.taxon	etymology	Etymology. The specific name refers to type locality, Yintiaoling.	en	Zeng, Liang-Liang, Huo, Qing-Bo, Du, Yu-Zhou (2025): A new species of Tyloperla (Plecoptera: Perlidae) from China, with a supplementary description of T. bimaculata Li & Kong, 2020. Zootaxa 5661 (4): 567-572, DOI: 10.11646/zootaxa.5661.4.7, URL: http://dx.doi.org/10.11646/zootaxa.5360.3.8
D52787B0FFC0FF98FF7EFE47FA8D6EBA.taxon	diagnosis	Diagnosis and remarks. The new species appears to be most closely related to T. bimaculata Li & Kong, 2020, sharing similar terminalia and penis structures. However, T. yintiaolinga sp. nov. can be distinguished by the presence of a distinct ventral projection on the endophallus that is densely covered with small spines (Fig. 2 C). In contrast, T. bimaculata possesses a pair of large ventral projections bearing large spines (Figs. 4 B – C).	en	Zeng, Liang-Liang, Huo, Qing-Bo, Du, Yu-Zhou (2025): A new species of Tyloperla (Plecoptera: Perlidae) from China, with a supplementary description of T. bimaculata Li & Kong, 2020. Zootaxa 5661 (4): 567-572, DOI: 10.11646/zootaxa.5661.4.7, URL: http://dx.doi.org/10.11646/zootaxa.5360.3.8
D52787B0FFC3FF9EFF7EF8E6FB516DBE.taxon	description	Supplementary description. Head yellow-brown, with only a single dark brown ocellar patch and a light brown patch anterior to the M-line (Fig. 3 A). The posterior margin of tergum 7 lacks a small patch of sensilla basiconica. Tergum 8 possesses a bird-shaped sclerotized area medially containing a transverse brown ridge posteriorly; sensilla basiconica patch present in middle of tergum (Fig. 3 B). The hemitergal processes of tergum 10 are acute, finger-like and strongly curved inward, with rounded basal callus on the inner side of their base (Fig. 3 B). The spines on the dorsal side of the endophallus are interrupted into two patches with a wide medial area (Fig. 4 A). On the ventral side of the endophallus, there are a pair of large projections covered with large spines (Fig. 4 B). The apex of the endophallus is covered with large spines that curve toward the ventral side, forming a conical projection directed anteriorly (Fig. 4 C).	en	Zeng, Liang-Liang, Huo, Qing-Bo, Du, Yu-Zhou (2025): A new species of Tyloperla (Plecoptera: Perlidae) from China, with a supplementary description of T. bimaculata Li & Kong, 2020. Zootaxa 5661 (4): 567-572, DOI: 10.11646/zootaxa.5661.4.7, URL: http://dx.doi.org/10.11646/zootaxa.5360.3.8
D52787B0FFC3FF9EFF7EF8E6FB516DBE.taxon	materials_examined	Material examined. 1 male (ICYZU), China: Chongqing, Wuxi County, Yintiaoling National Nature Reserve, Linkouzi, 1285 m, 2022. VI. 21, leg Luyu Wang, Zhisheng Zhang.	en	Zeng, Liang-Liang, Huo, Qing-Bo, Du, Yu-Zhou (2025): A new species of Tyloperla (Plecoptera: Perlidae) from China, with a supplementary description of T. bimaculata Li & Kong, 2020. Zootaxa 5661 (4): 567-572, DOI: 10.11646/zootaxa.5661.4.7, URL: http://dx.doi.org/10.11646/zootaxa.5360.3.8
D52787B0FFC3FF9EFF7EF8E6FB516DBE.taxon	distribution	Distribution. China (Chongqing, Guizhou)	en	Zeng, Liang-Liang, Huo, Qing-Bo, Du, Yu-Zhou (2025): A new species of Tyloperla (Plecoptera: Perlidae) from China, with a supplementary description of T. bimaculata Li & Kong, 2020. Zootaxa 5661 (4): 567-572, DOI: 10.11646/zootaxa.5661.4.7, URL: http://dx.doi.org/10.11646/zootaxa.5360.3.8
D52787B0FFC3FF9EFF7EF8E6FB516DBE.taxon	discussion	Remarks. This species was originally described from Guizhou Province by Li & Kong (2020). The original description stated that the head is mostly pale, with a pair of small dark brown patches forward of the posterior ocelli, with each patch subequal in size to one posterior ocellus. Tergum 8 has an upraised brown sclerite area (see fig. 1 in Li & Kong, 2020). In our specimens, however, the head is yellow-brown, bearing only a single dark brown ocellar patch, along with a light brown patch anterior to the M-line (Fig. 3 A). Tergum 8 also possesses an upraised brown sclerite area, although it is distinctly narrower than originally described (Fig. 3 B). Our observations reveal variations in both the position of dark spot on the head and the thickness of the transverse brown ridge compared to the original description. These morphological differences likely represent intraspecific variation.	en	Zeng, Liang-Liang, Huo, Qing-Bo, Du, Yu-Zhou (2025): A new species of Tyloperla (Plecoptera: Perlidae) from China, with a supplementary description of T. bimaculata Li & Kong, 2020. Zootaxa 5661 (4): 567-572, DOI: 10.11646/zootaxa.5661.4.7, URL: http://dx.doi.org/10.11646/zootaxa.5360.3.8
D52787B0FFC5FF9EFF7EFE2BFB5E6802.taxon	distribution	The genus Tyloperla exhibits a distribution centered in southwestern China (Sichuan, Guizhou, Chongqing, Yunnan, and Guangxi), extending northward to temperate climatic zones (Shaanxi) and southward to southeast Asia (Thailand and Vietnam), demonstrating remarkable adaptability to diverse geographical environments (Table 1). Its widespread occurrence across subtropical-tropical transitional zones (Yunnan, Guangxi, Sichuan) is facilitated by humid climatic conditions and heterogeneous topographies (karst landforms and montane forests), which provide ecologically diversified habitats (Fig. 5). The geographical proximity between southeast Asia and southwestern China creates natural dispersal corridors, as evidenced by the shared distribution patterns in Vietnam, Thailand, and the Yunnan-Guangxi border regions, reflecting a pronounced preference for tropical-subtropical climates. The overall distribution is driven by subtropical humid climate regimes and strongly correlates with geographical connectivity features, particularly mountain range alignments and fluvial systems (Yangtze River, Red River, Mekong River). This biogeographic pattern corresponds to the genus' ecological requirements: larvae exhibit strict dependence on pristine aquatic environments, while adults inhabit riparian vegetation, indicating high sensitivity to water quality and habitat integrity.	en	Zeng, Liang-Liang, Huo, Qing-Bo, Du, Yu-Zhou (2025): A new species of Tyloperla (Plecoptera: Perlidae) from China, with a supplementary description of T. bimaculata Li & Kong, 2020. Zootaxa 5661 (4): 567-572, DOI: 10.11646/zootaxa.5661.4.7, URL: http://dx.doi.org/10.11646/zootaxa.5360.3.8
