Polyplectropus cubitalis, Zhong, Hua, Yang, Lian-Fang & Morse, John C., 2010

Zhong, Hua, Yang, Lian-Fang & Morse, John C., 2010, Four new species and two new records of Polyplectropus from China (Trichoptera: Polycentropodidae), Zootaxa 2428, pp. 37-46 : 38-39

Polyplectropus cubitalis sp. nov. Zhong and Yang

( Figs. 1–7 )

Adult. Length of forewing 5.4–6.0 mm (N = 2). Head light brown with yellowish antennae, pronotum dark yellow, meso-, metanota and forewings light brown.

Male genitalia. Posterior margin of sternum IX with semicircular excision in ventral view. Terga IX + X short, sub-trapezoid in dorsal view. Preanal appendage approximately 4 times as long as apical width, narrowed at 1/3 distance from rounded apex in lateral view. Dorsobasal process of preanal appendage needlelike and recurved caudad at 1/4 distance from base in lateral view. Basal half of inferior appendage broad and apical half slender in lateral view, with distal end extending beyond distal end of preanal appendage; in ventral view, inferior appendages elbowed, with apical half gradually narrowed and apex slightly concave mesally; ventromesal lobe located at basal half of inferior appendage and setose, with apical “U” excision in lateral view; in ventral view, with apical margin toothed irregularly. Subphallic sclerite trough-like, with lateral walls strongly erect and bottom expanded horizontally in caudal view; in ventral view, its apex with mesal “U” excision. Phallus simple tube, about 4 times as long as average width.

Holotype: male, Guizhou Province, Chi-shui County, 28.34°N, 105.42°E, Hu-shi-zhen, Nan-zhu-linchang, Jin-sha-gou, Gong-ye-gan-gou, 9 November 1995, Coll. WANG Bei-Xin, SUN Chang-Hai. Paratype: 1 male, same data as holotype.

Diagnosis. This new species belongs to the P. anakgugur Group and is very similar to Polyplectropus anakgugur Malicky 1995 , from Malaysia. It differs in that 1) the basal half of inferior appendage is broad and the apical half slender in lateral view (equally wide in P. anakgugur ); 2) terga IX+X has no process (with a pair of horn-shaped processes in P. anakgugur ); 3) the apex of the subphallic sclerite has a mesal “U” excision (a broad excision, with the mesal portion strongly protruded and with a small notch at its center in P. anakgugur ).

Etymology. The species name is a Latin adjective cubitalis (= cubital) to indicate the shape of inferior appendages in ventral view.

Distribution. China (Guizhou).

Figures

FIGURES 1 – 7. Polyplectropus cubitalis sp. nov., male genitalia: 1 — dorsal view; 2 — left lateral view; 3 — ventral view; 4 — phallus, dorsal view; 5 — phallus, left lateral view; 6 — subphallic sclerite, caudal view; 7 — subphallic sclerite, ventral view. Abbreviations of structures in illustrations: d. pro. pre. app. = dorsobasal process of a preanal appendage; inf. app. = inferior appendage; pha. = phallus; s. IX = sternum IX; s. s. = subphallic sclerite; pre. app. = preanal appendage; t. IX + X = terga IX + X; v. lb. inf. app. = ventromesal lobe of an inferior appendage.