Polyplectropus giandi, 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 : 26-27

Polyplectropus giandi , new species

Figures 35–37

Diagnosis: This species has simple gonopods resembling those of P. bacphanensis Mey from Vietnam (Fan Si Pan Mts.) and P. menna Malicky & Chantaramongkol from Thailand. The new species is easily distinguished from the other species in having short and almost quadrangular cerci, not elongated as in P. bacphanensis or oviform as in P.menna ; the mesad-directed apices of the gonopods are narrow, not broad and truncate as in P. bacphanensis or broad and rounded as in P. menna . The dorsal paraproctal, spine-like processes are short and horizontal, not long and oblique as in P. bacphanensis , or long and anteriorly sinuous as in P. menna . The new species has a bilobed paraproctal subphallic sclerite, which is monolobed in P. menna .

Description: Male. Body uniformly brown. Maxillary palp formula (I,II)-IV-III-V, segment 3 of each maxillary palp originating subapically on lateral surface of segment 2. Forewing length 3.2 mm. Forewings each with discoidal cell closed; hind wing discoidal cell open; forewing median cell closed; forewings each with apical forks 1, 2, 3, 4, and 5; hind wings each with apical forks 2 and 5.

Male genitalia. Sternite IX subtriangular ( Fig. 35 ), with rounded lobe on each posterior margin near base of its gonopod; narrow, tergite IX sclerotized, parallel-sided, obliquely directed in continuation with sternite IX, forming fulcrum on each side with cerci and paraproctal complexes. Segment X semimembranous, covered with microtrichia at basal 1/3rd, and with transparent membrane on distal 2/3rds; located above dorsum of phallic apparatus. Cerci short, quadrangular, as long as dorsal paraproctal processes and longer than paraproctal subphallic sclerite. Paraproctal complexes fused with cerci; dorsal, sclerotized, spine-like paraproctal process on each side straight, horizontal, with antrerior part angling 45 degrees; paraproctal subphallic sclerite bilobed; lobes widely separated; apices of lobes setose. Gonopods broad at base ( Fig. 36 ), each with rod-like distal half ( Fig. 35 ), apex curving mesad, narrowing, with tiny, subapical, dark tooth. Phallic apparatus ( Fig. 37 ) nearly indiscernible, located dorsally in genitalia, guided by dorsal paraproctal processes and paraproctal subphallic sclerite; comprising tube-like, sclerotized phallotheca and membranous endotheca or endophallus, without visible sclerites.

Holotype male: VIETNAM: Lamdong , Baoloc, Loc Chau stream, 24.x.1988, sweep net [J. Oláh]— ( OPC).

Distribution: Vietnam.

Etymology: Giandi, “simple” in Vietnamese, named after its simple gonopods.

Figures

FIGURES 35–37. Polyplectropus giandi, new species, holotype. 35—genitalia, left lateral; 36—left gonopod, ventral; 37—phallic apparatus, left lateral.