Diplectrona dimagaha, Oláh & Johanson, 2010

Oláh, János & Johanson, Kjell Arne, 2010, Fifteen new Trichoptera (Insecta) species from Sumatra, Indonesia, Zootaxa 2618 (1), pp. 1-35 : 19-20

Diplectrona dimagaha , new species

Figs 31–34

This new species belongs to the Diplectrona aurovittata-obscura-tamdaophila complex and is distinguished from the other species by having forewings being light speckled and marbled, not patterned. In addition, the cerci are very broad and occupying a large part of the anterior half of segment X; the smooth paraproctal lobes are bilobed; and the dorsoapical setose lobes of segment X are shorter than the dorsal lobes of the paraprocts.

Male. Body medium brown with light speckled and marbled forewings, with confluent spots forming large, light patches. Eyes glabrous. Setal warts on head and thorax light brown. Proepisternal setal warts present and swollen. Cephalic warts on face forming pair of rounded and horizontally elongated frontal lateral compact setose warts; single clypeal median compact setose wart; and single labral anteromedian compact setose wart. In addition to single vertexal medioantennal compact setose wart, head dorsum with 4 pairs of setose warts: (1) narrowly elongated postgenal compact setose warts; (2) large, egg-shaped compact occipital setose warts; (3) vertexal ocellar compact setose warts; and (4) vertexal lateroantennal compact setose warts. Vertexal ocellar and lateroantennal compact setose warts fused. Coronal, lateral vertexal, occipital and postoccipital grooves forming dark brown lines on dorsum of head. Cranial areas medium brown, setal warts light brown. Anterodorsal filament on sternite V slender, not exceeding sternite V in length; internal reticulated sacs not visible.

Forewing length 7.1 mm. Hind wing apical fork I present.

Male genitalia. Segment IX short, anteriorly convex, with weakly developed dorsal and ventral concavity along anterior margin; median keel separated by deep notch, forming 2 broad, flat ridges longer than segment X; slightly narrowing apically, granulose, with microtrichia. Segment X fused with tergum IX; short, weakly sclerotized. Dorsoapical setose lobes of segment X (inner lobes of segment X) weakly developed; rounded, broad, shorter than paraprocts; posterior 1/3rd separated by narrow, deep, dorsal interlobular gap. Ventroapical setose lobe of segment X small, with 3 setae below and slightly mesal of ventral paraproctal lobes. Cerci setose, vertically elongate, broad, occupying basal half of segment X. Paraproct (outer lobes of segment X) smooth, slightly longer than segment X, bilobed; dorsal lobe short, spine-shaped; ventral lobe blunt. Gonopods straight; coxopodites each with weakly dilated apical 1/3rd; harpagones narrow, arching mesad, parallel-sided, tapering abruptly at apices. Phallic apparatus with down-curving and broad basal section, with slightly longer, horizontal, tubular apical half, with elongate ventral lobe in lateral view. Endotheca with 2 pairs of triangular processes; dorsal endothecal processes large, ventral endothecal processes slightly smaller than dorsal processes. Phallotremal sclerite indistinct.

Holotype male: INDONESIA (Sumatra): Kerinci National Park , “W” waterfall, 1500 m, 5.vii.2008, light trap [J. Oláh, Jr.]—(OPC, in alcohol).

Paratypes: same data as holotype — 3 males (OPC, in alcohol) .

Distribution: Indonesia (Sumatra).

Etymology: Dimagaha, from “di” and “magah,” 2-lobed in Sanskrit, referring to the 2-lobed paraprocts of the genitalia.

Figures

FIGURES 31–34. Diplectrona dimagaha, new species, holotype. 31—genitalia, left lateral; 32—genitalia, dorsal; 33— right gonocoxite, ventral; 34—phallic apparatus, left lateral.