Three new species of Sinacroneuria Yang & Yang, 1995 (Plecoptera: Perlidae) from Zhejiang Province, southeastern China Author Xiang, Ya-Nan 0000-0003-2972-6262 School of Horticulture and Plant Protection & Institute of Applied Entomology, Yangzhou University, Yangzhou 225009, China Joint International Research Laboratory of Agriculture and Agri-Product Safety, the Ministry of Education, Yangzhou University, Yangzhou 225009, China & xynxiang @ 163. com; https: // orcid. org / 0000 - 0003 - 2972 - 6262 Author Huo, Qing-Bo 0000-0001-9197-8503 School of Horticulture and Plant Protection & Institute of Applied Entomology, Yangzhou University, Yangzhou 225009, China Joint International Research Laboratory of Agriculture and Agri-Product Safety, the Ministry of Education, Yangzhou University, Yangzhou 225009, China & 1677537335 @ qq. com; https: // orcid. org / 0000 - 0001 - 9197 - 8503 1677537335@qq.com Author Du, Yu-Zhou School of Horticulture and Plant Protection & Institute of Applied Entomology, Yangzhou University, Yangzhou 225009, China Joint International Research Laboratory of Agriculture and Agri-Product Safety, the Ministry of Education, Yangzhou University, Yangzhou 225009, China text Zootaxa 2022 2022-08-18 5175 4 487 493 journal article 123620 10.11646/zootaxa.5175.4.6 04320dd3-3a9f-4b90-820a-5473658f9daf 1175-5326 7006513 40A63FDE-3600-46DD-928D-7DB403E5C663 Sinacroneuria complana Xiang & Du , sp. nov. Figs. 2a–2e Adult habitus. General body color yellow brown. Head yellowish with a light brown spot covering ocellar triangle; triocellate, lateral ocelli margined by black pigmentation, anterior ocellus smaller ( Fig. 2a ). Antenna yellow brown and palpi yellow brown. Pronotum rectangular with irregular rugosities ( Fig. 2a ). Legs mostly yellow brown. Wings hyaline with veins brown. Male. Body length 13.8–14.5 mm , forewing length 15.8–16.2 mm , hindwing length 14.0– 14.1 mm (n = 4). Tergum 9 with few sensilla basiconica posteriorly; tergum 10 bearing a larger patch of sensilla basiconica ( Figs. 2b, 2d ); paraprocts sclerotized, curved upward in a hook shape to the posterior margin of tergum 10 ( Fig. 2d ). Sternum 9 with an oval hammer at the middle of the posterior margin ( Fig. 2c ). Aedeagus mostly membranous. Aedeagal sclerites sclerotized, stem slender, length nearly same as Y-arms. Y-arms wide and flat, long and triangular in shape, connected with stem at near 1/2 of the length; base wide, apex concave and tapering outward and hook shaped; lateral sclerites slender and slightly sclerotized, the width was ca. 1/3 times of Y-arms; medial sclerite basally thick, apex tapering with tiny spines ( Fig. 2e ). Female. Unknown. Type material. Holotype : male, China : Zhejiang Province , Wenzhou City , Taishun County , Wuyanling National Nature Reserve , 680 m , 2005-V-7 , leg. Wang Yi-Ping. Paratypes : 3 males , same data as the holotype . Etymology. The name complana (from the word complanate) refers to the sclerites of aedeagus that are wide and flat. Distribution. China , Zhejiang Province . Diagnosis. Sinacroneuria complana sp. nov. is similar to S. acuticornis Uchida, 2017 by sharing similar structural characteristics of the aedeagal Y-arms. The lateral sclerites of aedeagus of S. complana are slender and nearly equal to the Y-arms ( Fig. 2e ), while that in S. acuticornis are shorter and about 1/2 length of the Y-arms (Figs. 42–44 in Li et al. 2017 ). Additionally, the tergum 9 sensilla basiconica patch of S. complana ( Fig. 2d ) is markedly sparser compared to S. acuticornis (Fig. 38 in Li et al. 2017 ). Sinacroneuria complana sp. nov. is also easily separated from S. lateralis Sivec & Stark, 2020 . The apex of Y-arms in S. lateralis ( Fig. 1g in Sivec & Stark 2020 ) are more separated from each other yet closed to each other in S. complana ( Fig. 2e ).