taxonID	type	description	language	source
A6498790FFB12311E2A20B7FFAC4FD39.taxon	description	Figs. 1 – 5 Male. Body length 5.8 – 6.2 mm (n = 3). Wings micropterous (Fig. 1). Head black with brown patches in posterior half, covered with small hairs, wider than pronotum; eye dark grayish with yellowish margin; ocelli pale brown; antennae and palpi light brown (Fig. 2). Pronotum black, quadrate with dark brown margin (Fig. 2). Legs light brown (Fig. 2) Terga 5 – 10 with anterior margins sclerotized. Sternum 9 basally with drop-shaped and long vesicle bearing tiny hairs, apically with a triangular subgenital plate (Fig. 3 A). Tergum 8 with a small protrusion in the center;. terga 9 – 10 medially with a curved triangular area (Fig. 3 B). Tergum 10 constricted medially, with distinct anterior indentation and strongly sclerotized margins (Fig. 3 B). Epiproct slender and long, sclerite upcurved, basely wider, and then fused into a slender sclerite almost straight but slightly curved backward anteriorly, apex slightly narrowed and ending without a distinctive structure (Fig. 4). Cerci hairy and long (Fig. 4). Female. Unknown	en	Yang, Xiao, Du, Yu-Zhou (2024): A new species of Isocapnia (Plecoptera: Capniidae) from China, with notes on I. apicispina Chen & Du, 2017 and I. arcuata Zhiltzova, 1975. Zootaxa 5471 (3): 374-382, DOI: 10.11646/zootaxa.5471.3.7, URL: http://dx.doi.org/10.11646/zootaxa.5471.3.7
A6498790FFB12311E2A20B7FFAC4FD39.taxon	materials_examined	Type materials. Holotype: ♂, China: Inner Mongolia, Niu’er Rivers (Fig. 5), 901 m, 51 ° 34 ′ 52 ″ N, 122 ° 38 ′ 39 ″ E, 2023 - V- 26, leg. Yang Xiao and Zhu Ya-Fei. Paratypes: 2 ♂♂, same data as holotype.	en	Yang, Xiao, Du, Yu-Zhou (2024): A new species of Isocapnia (Plecoptera: Capniidae) from China, with notes on I. apicispina Chen & Du, 2017 and I. arcuata Zhiltzova, 1975. Zootaxa 5471 (3): 374-382, DOI: 10.11646/zootaxa.5471.3.7, URL: http://dx.doi.org/10.11646/zootaxa.5471.3.7
A6498790FFB12311E2A20B7FFAC4FD39.taxon	etymology	Etymology. The species is named after the type locality that Niuer River of Hanma Reserve.	en	Yang, Xiao, Du, Yu-Zhou (2024): A new species of Isocapnia (Plecoptera: Capniidae) from China, with notes on I. apicispina Chen & Du, 2017 and I. arcuata Zhiltzova, 1975. Zootaxa 5471 (3): 374-382, DOI: 10.11646/zootaxa.5471.3.7, URL: http://dx.doi.org/10.11646/zootaxa.5471.3.7
A6498790FFB12311E2A20B7FFAC4FD39.taxon	diagnosis	Diagnosis. Isocapnia niuerheensis sp. nov. is mainly similar to I. guentheri, but are different due to characteristics of the epiproct. The epiproct of the I. guentheri has a small inward protrusion at the tip (Fig. 6 B) but whereas I. niuerheensis sp. nov. lacks such a distinct protrusion (Fig. 6 A). Isocapnia niuerheensis sp. nov. is also similar to I. anguis, but the new species has wings reduced in size and the vesicle is more slender. Isocapnia anguis is known only from Sichuan, southwest China, and is> 2000 km distant from the Niu’er Rivers of Inner Mongolia.	en	Yang, Xiao, Du, Yu-Zhou (2024): A new species of Isocapnia (Plecoptera: Capniidae) from China, with notes on I. apicispina Chen & Du, 2017 and I. arcuata Zhiltzova, 1975. Zootaxa 5471 (3): 374-382, DOI: 10.11646/zootaxa.5471.3.7, URL: http://dx.doi.org/10.11646/zootaxa.5471.3.7
A6498790FFB42317E2A20DA3FE02FD09.taxon	description	Figs. 8 – 11	en	Yang, Xiao, Du, Yu-Zhou (2024): A new species of Isocapnia (Plecoptera: Capniidae) from China, with notes on I. apicispina Chen & Du, 2017 and I. arcuata Zhiltzova, 1975. Zootaxa 5471 (3): 374-382, DOI: 10.11646/zootaxa.5471.3.7, URL: http://dx.doi.org/10.11646/zootaxa.5471.3.7
A6498790FFB42317E2A20DA3FE02FD09.taxon	materials_examined	Material examined: Holotype: 1 ♂, China: Xinjiang Uygur Autonomous Region, Fuyun County, Riverside Park, Eerqisi River, 793 m, 46.9865 N, 89.5247 E, 29 April, 2017, Hai-Yang Xue (ICYZU). Paratypes: 1 ♂, same locality and data as holotype (ICYZU).	en	Yang, Xiao, Du, Yu-Zhou (2024): A new species of Isocapnia (Plecoptera: Capniidae) from China, with notes on I. apicispina Chen & Du, 2017 and I. arcuata Zhiltzova, 1975. Zootaxa 5471 (3): 374-382, DOI: 10.11646/zootaxa.5471.3.7, URL: http://dx.doi.org/10.11646/zootaxa.5471.3.7
A6498790FFB42317E2A20CBAFAB1FEAC.taxon	materials_examined	Material examined: 1 ♂, Russia. Khabarovsk Region, Chistovodnaya River, 1984 - IV- 30, leg. V. Teslenko	en	Yang, Xiao, Du, Yu-Zhou (2024): A new species of Isocapnia (Plecoptera: Capniidae) from China, with notes on I. apicispina Chen & Du, 2017 and I. arcuata Zhiltzova, 1975. Zootaxa 5471 (3): 374-382, DOI: 10.11646/zootaxa.5471.3.7, URL: http://dx.doi.org/10.11646/zootaxa.5471.3.7
