Plectrocnemia martynovi, Oláh & Johanson, 2010

Oláh, János & Johanson, Kjell Arne, 2010, Generic review of Polycentropodidae with description of 32 new species and 19 new species records from the Oriental, Australian and Afrotropical Biogeographical Regions 2435, Zootaxa 2435 (1), pp. 1-63 : 11-12

Plectrocnemia martynovi , new species

Figures 1–3

Diagnosis: This species is most similar to P. distincta Martynov from India. Plectrocnemia martynovi is easily distinguished from that species in having a shorter membranous segment X; broad, foliaceous cerci (not triangular as in P. distincta ), cerci each without a small ventral lobe; its ventral paraproctal process with strongly downward-curving hook. Basomesal process of each gonopod very small and invisible in lateral view.

Description: Male. Body uniformly brown. Maxillary palp formula (I,II)-IV-III-V, 3rd segment of each maxillary palp inserted subapically on subapicolateral side of 2 nd segment. Forewing length 14.0 mm, brownmarbled. Forewings each with discoidal cell and median cell closed, apical forks 1, 2, 3, 4, and 5. Hind wings each with discoidal cell closed; apical forks 1, 2, and 5.

Male genitalia. Sternite IX subtriangular with excised concavity on each posterolateral margin near gonopod ( Fig. 1 ); dorsoapical half on each side fusing with cerci and paraproctal complexes. Tergite IX small, membranous or slightly sclerotized, connected to sternite IX. Segment X forming pair of transparent membranous posterad-projecting lobes, with pilose apices ( Fig. 1 ). Setose cerci tall, foliaceous, each with concave posterior margin; anterior margin fused to dorsoapical half of sternite IX. Paraproctal complex on each side with smooth, glabous, dorsal paraprocts ( Fig. 1 ) spine-like in lateral view, triangular in dorsal view; projecting and fused anteriorly to cerci, guiding phallic apparatus dorsally; ventral paraproctal process on each side heavily sclerotized, strong, downward-curving hook fused to mesal part of basoventral corner of its cercus, forming lateral guide for phallic apparatus. Gonopods simple, straight, horizontal, almost parallelsided along its length in lateral view ( Fig. 1 ); each with strong, digitate process directed in right angle mesad in ventral view ( Fig. 2 ), basal half broad mesally, abruptly narrowed at right angle near middle, with small basomesal process setose apically. Phallic apparatus ( Fig. 3 ) with elaborate basal compartment, continuing into narrow, horizontal, rod-like phallotheca with membranous endophallus.

Holotype male: MYANMAR: Mishmi Hills , Lohit River, iii.1935 [M. Steele]—( BMNH, Brit. Mus. 1935-312).

Distribution: Myanmar.

Etymology: Martynovi , named after the Russian trichopterologist A. V. Martynov (1879–1938), for his great contributions to the study of Indian caddisflies and for describing the similar polycentropodid Plectrocnemia distincta .

Figures

FIGURES 1–3. Plectrocnemia martynovi, new species, holotype. 1—genitalia, left lateral; 2—left gonopod, ventral; 3—phallic apparatus, left lateral.