Dipseudopsis gunung, Oláh, János & Johanson, Kjell Arne, 2010

Oláh, János & Johanson, Kjell Arne, 2010, Contributions to the systematics of the genera Dipseudopsis, Hyalopsyche and Pseudoneureclipsis (Trichoptera: Dipseudopsidae), with descriptions of 19 new species from the Oriental Region., Zootaxa 2658, pp. 1-37 : 9-10

Dipseudopsis gunung , new species

Figs 17–21

This species is similar to D. contorta Banks, 1931 , and D. triclavata Martynov, 1935 . However, the modified hind leg spurs are bifid, not trifid as in both D. contorta and D. triclavata , and the forewings each have 6 differently shaped, weakly hyaline spots.

Male. Entire body rather uniformly dark brown; pronotum, antennae, palps and legs slightly lighter.

Head. Maxillary palp segment III originating subapically on segment II. Labrum dark brown, sclerotized. Interantennal part of frons very narrow. Pair of large, setose, mesal longitudinal bands present, probably representing fused vertexal lateroantennal and vertexal ocellar diffuse setose warts. Lateral cervical sclerites widely triangular.

Thorax. Pronotum pale. Mesoscutum sparsely covered by tiny alveoli, separated by shallow median longitudinal furrow; mesoscutellum with pair of fragmented compact setal warts. Mid leg posterior spurs longer than anterior spurs; hind leg modified spurs bifid from distal 2/3rds their lengths: each with mesal point directed laterad, crescent-shaped; lateral point slender, less sinuous, directed mesad.

Forewing length 11.0 mm. Brown forewing membrane with 6 weakly hyaline spots: (1) pterostigmal spot sub-triangular; (2) small spot adjacent to base of pterostigma rounded; (3) subapical radial spot elongate; (4) spot at arculus nearly triangular; (5) spot dorsally adjacent to arculus small, elongate; (6) sub-cordal spot largest, obliquely elongate.

Male genitalia. Segment IX with equally large tergite and sternite, connected by narrow strip on each side composed of antecostal ridge and of fused base of large preanal appendage; tergite vertically tall, subquadrangular in lateral view, with small dorsoapical overhanging triangular rim, rounded in dorsal view, slightly overhanging segment X; setose fields invisible; sternite IX subquadrangular in lateral view, with bulging basodorsal corners articulated with antecostal ridge, preanal appendages and phallocrypt, forming mesosuperior process. Phallocrypt weakly sclerotized, embedded in conjunctive membranes encircling dorsum of phallobase, connecting to venter of segment X. Pair of short, lateral, weakly sclerotized lobes fixed to short phallic apodeme; basal plate forming long rod of apodeme of inferior appendages below phallocrypt complex, not attached by sclerotized connection either to phallocrypt or to phallobase. Segment X longer than inferior appendages, originating beneath overhanging tergite IX, forming heavily pigmented hood above phallus, dorsum deeply concave in lateral view, setose areas on apex weakly discernible; starting from broad base, thumb-shaped in lateral view; apex excised in dorsal view. Intersegmental depression between segment IX and segment X forming short, vertical concavity in lateral view beneath slightly overhanging tergite IX; produced into deeply rounded step. Preanal appendages nearly triangular auriform, with slightly excised apical portion; venter not narrowing basally; preanal appendages fused with antecostal ridge of segment IX along wide basal part; hinged dorsally to tergite IX and ventrally to basodorsal corner of sternite IX. Inferior appendages shorter than segment X; sinuous, with convex dorsum and deeply concave venter; dilating apicad in lateral view. Phallic apparatus small. Phallotheca composed of heavily sclerotized, broad basal tube and of slightly narrowing ventroapical lobe; basal part without phallotheca; delineation of membranous dorsal and apical endotheca and aedeagus obscured; weakly sclerotized phallotremal sclerite complex present, position varying.

Holotype male: MALAYSIA: Sarawak, Gunung Mulu National Park, v.1977 [J. D. Holloway, R.G.S. Exp.], ( NHML).

Etymology. Gunung , named after the type locality, Gunung Mulu National Park.

Figures

FIGURES 17 – 21. Dipseudopsis gunung, new species, holotype male. 17 — right forewing, dorsal; 18 — left hind leg apical tibial spurs; 19 — genitalia, left lateral; 20 — genitalia, dorsal; 21 — inferior appendage, ventral.