Plectrocnemia maoerensis Zhong, Yang & Morse

Zhong, Hua, Yang, Lian-Fang & Morse, John C., 2012, The genus Plectrocnemia Stephens in China (Trichoptera, Polycentropodidae), Zootaxa 3489, pp. 1-24 : 4-6

Plectrocnemia maoerensis Zhong, Yang & Morse , sp. nov.

( Fig. 3 )

Adult. Length of each male forewing 6.5–6.8 mm (N = 5). Head of specimens in alcohol brown with yellowish antennae, pronotum brownish with pale brown warts, meso- and metanota light brown, forewings gray.

Male genitalia. Sternum IX highly sclerotized, ventral half oval anteriorly in lateral view ( Fig. 3 B), posterior margins sinuate, each with triangular protrusion subdorsally; in ventral view ( Fig. 3 A), anterior margin with semicircular excision, posterior margin broadly concave; tergum IX translucent, semi-sclerotized, obtusely pentagonal in dorsal view ( Fig. 3 C). Tergum X lightly sclerotized, with V-shaped apicomesal incision in dorsal view; deep, subtriangular lobe in lateral view ( Fig. 3 B). Intermediate appendages not well developed, represented as thickenings of ventrolateral margins of tergum X, elongate and crescentic in lateral view ( Fig. 3 B), with bases broad, oval in dorsal view ( Fig. 3 C). Preanal appendages rectangular in lateral view ( Fig. 3 B), about 2.3 times as long as wide; mesoventral processes long, slender, recurved caudad, and each with its distal 1/3rd highly elevated and crinkled apically ( Fig. 3 D). Inferior appendages short, rectangular, broad apically, each with ventral margin approximately 1.3 times as long as its average width in lateral view ( Fig. 3 B); in ventral view ( Fig. 3 A), distal margin broadly round; mesal plates with digitate processes slender, each with apex densely toothed and directed mesoventrad, mesal plate bearing 2 stout subapical setae ( Fig. 3 F); ventromesal processes broad at bases, narrowing to round apices, each densely covered with fine teeth. Phallus tubular, highly compressed, phallobase approximately as long as phallicata, 1 pair of paramere spines highly sclerotized, almost as long as dorsal margin of phallobase; pair of phallic sclerites slender, sinuate and acute at their anterior and posterior ends in lateral view ( Fig. 3 E); apex of subphallic sclerite 3-branched in ventral view ( Fig. 3 G).

This new species is very similar to P. plicata Schmid 1959 from China (Yun-nan). The male differs from that of P. plicata in the following characters: 1) the ventrolateral process of tergum X is elongate and crescentic in lateral view, with an oval base in dorsal view (strip-like in both lateral and ventral views in P. plicata ); 2) the subphallic sclerite is divided into 3 branches apically (2 branches in P. plicata ); and 3) the inferior appendages each have a ventral margin about 1.3 times as long as wide in lateral view; its mesal plate has 2 stout subapical setae (each inferior appendage 2 times as long as wide in lateral view; its mesal plate has 5–6 subapical setae arranged in a row in P. plicata ).

Holotype male: Guang-xi Province: Xing-an County, Mt. Mao-er National Nature Reserve, bridge and dam on unnamed tributary of Xun-Jiang River, N25.89°, E110.43°, 13.0 km N of Jiu-niu-tang Gate, alt. 1965 m, 17 June 2004, Coll. Yang L-f. and J.C. Morse.

Paratypes: Guang-xi Province: same data as holotype, 12 males; same data except 17.6 km N of Jiu-niu-tang Gate, N25.87°, E110.41°, alt. 1977 m, 17 June 2004, Coll. Sun C-h. and K.M. Kjer, 2 males.

Etymology. The species name is derived from the type locality, Mt. Mao-er.

Distribution. China (Guang-xi).

Figures

FIGURE 3. Plectrocnemia maoerensis sp. nov., male genitalia. A, ventral view; B, left lateral view; C, dorsal view; D, apex of mesoventral process, left lateral view; E, phallus, left lateral view; F, right inferior appendage, caudal view; G, subphallic sclerite, ventral view. ap. s. = apical setae of mesal plate; dig. pro. = digitate process of a mesal plate; inf. app. = inferior appendage; int. app. = intermediate appendage; m. v. pro. = mesoventral process of a preanal appendage; para. = paramere; ph. b. = phallobase; ph. c. = phallicata; ph. scl. = phallic sclerite; pre. app. = preanal appendage; s. IX = sternum IX; sph. s. = subphallic sclerite; t. IX = tergum IX; t. X = tergum X; v. pro. = ventromesal process of an inferior appendage.