Four new species and two new records of Polyplectropus from China (Trichoptera: Polycentropodidae) Author Zhong, Hua Author Yang, Lian-Fang Author Morse, John C. text Zootaxa 2010 2428 37 46 journal article 37430 10.5281/zenodo.204733 6580f7aa-cee6-418b-98d7-ffd34e18a06b 1175-5326 204733 Polyplectropus tridentatus sp. nov. Zhong and Morse ( Figs. 15–21 ) Adult. Length of forewing 5.5–6.3 mm (N = 4). Head light brown with yellowish antennae, pronotum dark yellow, meso- and metanota brown, forewings light brown. Male genitalia. Posterior margin of sternum IX with broad “U” excision mesally and small median protrusion in ventral view. Terga IX + X short, tongue-like in dorsal view. Preanal appendage narrowed abruptly at 1/3 distance from base in lateral view, basal portion cone-shaped, apical portion approximately 2.5 times as long as basal portion, sub-oval; apex of preanal appendage strongly produced mesad in large, triangular projection bearing 3 stout teeth in both dorsal and ventral views. Dorsobasal process of preanal appendage triangular basally, recurved caudad at 1/3 distance from base, with recurved portion evenly turned upward and with acute apex. Inferior appendage constricted at middle in lateral view, approximately 2 times as long as basal width, distal portion of each appendage curved mesad with bilobed apex; in ventral view, with dorsal branch more highly sclerotized; ventromesal lobe produced mesad near middle of appendage, causing appendage to appear incised at right angle at middle of appendage. Subphallic sclerite trough-like in caudal view, apex with deeply rounded excision and mesal incision in ventral view. Phallus simple tube, about 4 times as long as average width. Holotype : male, Guangxi Province, Tian-lin County, Mt. Cen-wang-lao Provincial Forest Preserve, Yaoshan Gou, tributary of Bu-liu River, County Road 794 marker 52.7 km , 24.47080 N , 106.35784 E , alt. 1223 m , 9 Jun 2004 , Coll. YANG Lian-Fang, Christy Jo GERACI. Paratypes : 1 male , same data as holotype ; 2 males , Guangxi Province, Tian-lin County, Mt. Cen-wang-lao Provincial Forest Preserve, unnamed tributary of headwaters of Bu-liu River, waterfall at County Road 794 marker 37.9 km , 24.41275 N , 106.38207 E , alt. 1422 m , 8 Jun 2004 , Coll. YANG Lian-Fang, Christy Jo GERACI. Diagnosis. This new species is very similar to Polyplectropus tharah Malicky and Chantaramongkol 1993 , from Vietnam . It differs in that: 1) inferior appendage has its apex divided into 2 broad and rounded lobes (not divided in P. tharah ); 2) each preanal appendage is narrowed abruptly at 1/3 distance from base in lateral view (not narrowed in P. tharah ); and 3) the apex of subphallic sclerite with deeply rounded excision with a mesal incision at the middle (“V” shape mesal excision with lateral teeth in P. tharah ). Etymology. The species name is a Greek adjective tridentatus (= tridentate) in reference to the tridentate subapicomesal protrusion of each preanal appendage in dorsal and ventral views. Distribution. China ( Guangxi ).