Polyplectropus subteres, 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 : 39-40

Polyplectropus subteres sp. nov. Zhong and Yang

( Figs. 8–14 )

Adult. Length of forewing 4.1–4.4 mm (N = 3). Head light brown with yellowish antennae, pronotum yellow, meso-, metanota and forewings light brown.

Male genitalia. Posterior margin of sternum IX with broad “U” excision and small median protrusion in ventral view. Terga IX + X forming large mesal lobe in dorsal view. Preanal appendage sub-rectangular in lateral view, with dorsal portion apically blunt and ventral portion plate-like in dorsal view. Dorsobasal process of preanal appendage recurved caudally 160 degrees at 1/3 distance from base, with acute distal end not quite reaching apex of preanal appendage. Inferior appendage sub-cylindrical with highly sclerotized, rounded apex in lateral view; in ventral view, apex covered with tiny teeth, the appendage with mesal triangular lobe subapically; ventromesal lobe of inferior appendage only slightly protruded at base of appendage. Subphallic sclerite deeply trough-like, easily seen in caudal view, apex with broadly rounded excision and small, median notch, in ventral view. Phallus forming simple tube, about 3 times as long as average width.

Holotype: male, Jiangxi Province, Mt. Wu-Yi National Nature Preserve, Li-tou-jian Stream, 27°58’49’’ N, 117°51’43’’ E, alt. 375–404 m, 5 June 2005, Coll. SUN Chang-Hai, ZHOU Chang-Fa, ZHOU Xin. Paratypes: 1 male, Jiangxi Province, Mt. Wu-Yi National Nature Preserve, Lei-gu-ling Stream, 27.99142°N, 117.89111°E, alt. 424 m, 4 June 2005, Coll. YANG Lian-Fang, Christy Jo GERACI; 1 male Zhejiang Province, Mt. Tian-mu, 30.4°N, 119.5°E, San-mu-ping, alt. 780 m, 14 July 1998, Coll. WU Hong.

Diagnosis. This new species belongs to the P. anakgugur Group and is very similar to Polyplectropus curvatus Li and Morse 1997 , from Fujian. It differs in that: 1) the dorsobasal process of each preanal appendage is recurved caudally 160 degrees, with distal end not reaching the apex of preanal appendage (recurved 90 degrees and reaching beyond the apex of the preanal appendage in P. curvatus ); 2) the apex of the subphallic sclerite has a broadly rounded excision and median notch (a slight mesal excision occurs in P. curvatus ).

Etymology. The species name is a Latin adjective, subteres (= nearly column-shaped), indicating the shapes of inferior appendages.

Distribution. China (Jiangxi, Zhejiang).

Figures

FIGURES 8 – 14. Polyplectropus subteres sp. nov., male genitalia: 8 — dorsal view; 9 — left lateral view; 10 — ventral view; 11 — phallus, dorsal view; 12 — phallus, left lateral view; 13 — subphallic sclerite, caudal view; 14 — subphallic sclerite, ventral view.