Polyplectropus dinhdan, 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 : 24-26

Polyplectropus dinhdan , new species

Figures 31–34

Diagnosis: This species is similar to P. prapat Malicky from Indonesia (Sumatra) and P. anakgugur Malicky from Malaysia (Peninsular). Each of these 3 species has a “nail” on the apex of each gonopod, and has a semimembranous segment X with a pair of lateral processes. These processes are spine-like and directed posterad in P. prapat , directed laterad in P. anakgugur , and directed anterad in P. dinhdan , new species. The apex of each process is 1-pointed in P. prapat and P. anakgugur , and characteristically trifid in P. dinhdan , new species. In addition, the new species has the dorsal paraproctal processes and the paraproctal subphallic sclerite differently shaped.

Description: Male. Body uniform brown. Maxillary palp formula (I,II)-IV-III-V, 3rd segment of each maxillary palp inserted subapically on lateral face of segment 2. Forewing length 5.3 mm. Forewings each with discoidal cell closed and median cell closed; hind wings each with discoidal cell open; Forewings each with apical forks 1, 2, 3, 4, and 5; hind wings each with apical forks 2 and 5.

Male genitalia. Abdominal segment IX composed mostly of robust, sclerotized sternite ( Fig. 31 ), subtriangular, with quadrangular lobe on each posterior margin near base of its gonopod; narrow, parallelsided and obliquely directed tergite IX covered with tiny microtrichia. Segment X semimembranous, with 2- lobed dorsum covered with microtrichia. Distal compartment of dorsum bearing pair of transparent, lateral processes without setae or microtrichia; each with broad base ( Fig. 31 ), curving anteroventrad with trifid apex ( Fig. 32 ). Cerci elongate, longer than paraproctal subphallic sclerite. Paraproctal complexes fused to cerci, each consisting of (1) long and spine-like dorsal paraproctal processes forming upcurving arch; and (2) paraproctal body with subphallic sclerite. Dorsal paraproctal process smooth, spiniform, rooted and arched anterior of paraproctal body; main paraproctal body constituting trilobed subphallic sclerite ( Fig. 32 ); lateral lobes broad, mesal lobe subdivided into 2 smaller lobes; in caudal view broad horizontal ventral plate forming 2 median, vertical plates laterally of phallic apparatus. Gonopods robust, elongated horizontally, each with mesad-curving apex; apices each ending in short “nail” framed by 2 small lobules in ventral view ( Fig. 33 ). Phallic apparatus ( Fig. 34 ) located dorsally in genitalia, guided by dorsal paraproctal processes and horizontal basal and 2 vertical plates of paraproctal subphallic sclerite; phallic apparatus characterised by tube-like, sclerotized phallotheca, clearly continuing into membranous endotheca or endophallus; without visible sclerites inside.

Holotype male: VIETNAM: Hoabinh toward Dabac, 21.x.1986, light [J.Oláh]—( OPC).

Paratypes: VIETNAM: Bac Thai Province , Quang Chu, 24–25.v.1987, light and sweep net [J.Oláh]— 2 males ( OPC) .

Distribution: Vietnam.

Etymology: Dinhdan, after ”dinh danh”, nail in Vietnamese, referring to the apical “nail” on the apex of each gonopod.

Figures

FIGURES 31–34. Polyplectropus dinhdan, new species, holotype. 31—genitalia, left lateral; 32—genitalia, caudal; 33—left gonopod, ventral; 34—phallic apparatus, left lateral.