Plectrocnemia thai, 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 : 20

Plectrocnemia thai , new species

Figures 24–27

Diagnosis: This species is most similar to P. sinyajevi Mey from Vietnam from which P. thai , new species, is distinguished by the shape of the gonopods, by the very short ventral arm of each bifurcated ventral paraproctal processes, and by the shape of the dorsal paraproctal processes in dorsal view.

Description: Male. Body uniformly brown. Spur formula 3,4,4. Maxillary palp formula (I,II)-IV-III-V, 3rd segment of each maxillary palp inserted subapically on lateral surface of 2 nd segment. Forewings brown, length 5.9 mm. Discoidal cell closed in each forewing and hind wing; forewings each with median cell closed. Forewings each with apical forks 1, 2, 3, 4, and 5, hind wings each with apical forks 1, 2, and 5.

Male genitalia. Sternite IX subtriangular, elongate anteroventrally ( Fig. 24 ); dorsoapical corner on posterolateral margin produced; dorsobasal part connecting sternite on each side to fulcrum formed by sclerotized cercus and large paraproctal complex and meeting points of nearly invisible membranous, vestigial tergite IX and segment X. Tergum IX not sclerotized, forming small, almost indiscernible membranous flank located anterodorsal of fulcrum. Segment X membranous, visible above cerci in lateral view ( Fig. 24 ). Setose cerci each arising from fulcrum, large, elongate, parallel-sided, foliaceous. Large paraproctal complex fused with basomesal region of each cercus, forming large body at fulcrum ( Fig. 24 ), continuing and turning ventromesad into bifurcated ventral paraproctal process; forming large, dorsal paraproctal processes; dorsal paraproctal processes with strongly sagitate lateral margins in dorsal view ( Fig. 25 ), with large ventral, rounded plate, supporting phallic apparatus. Gonopods short, triangular in lateral view ( Fig. 24 ), each with basal dorsomesal lobe in middle, present as inner, elongate process with mesad-directed apex in ventral view ( Fig. 26 ), not visible in lateral view; anterior margin produced into mesal ridge with 3 strong and several small setae. Phallic apparatus ( Fig. 27 ) broad, oriented horizontally, fixed and guided dorsally by sclerotized paraproctal and cercal complex, by membranous segment X, and possibly by subphallic bridge of paraprocts; large, sclerotized phallotheca with short phallobase with wide anteroventral foramen; border between phallicata and endophallus distinct; pair of dorsal, thick parameres freely movable; elongated, weakly pigmented, indistinct phallotremal sclerite present in middle inside retracted endotheca; pair of spines visible at border of phallicata and endophallus.

Holotype male: VIETNAM: Moc Chau , 25.x.1986, light [J. Oláh]—( OPC).

Distribution: Vietnam.

Etymology: Thai, named for the „thai” minority population living near the type locality.

Figures

FIGURES 24–27. Plectrocnemia thai, new species, holotype. 24—genitalia, left lateral; 25—genitalia, dorsal; 26—left gonopod, ventral; 27—phallic apparatus, left lateral.