Irianjaya luzonensis, Tomasovic & Constant, 2015

Tomasovic, Guy & Constant, Jérôme, 2015, Notes on the genus Irianjaya Koçak & Kemal with a new species from the Philippines (Diptera: Asilidae: Asilinae), Belgian Journal of Entomology 30, pp. 1-9 : 1-9

Irianjaya luzonensis sp. nov.

( Figs 2 , 3 A-F, 4)

TYPE MATERIAL. Holotype ♂ Philippines, Luzon, Zambales prov., Subic , 19-20.IV.2014, 14°45’N 180°13’E. Day collecting. I.G.: 32700. Mission Leopold III Funds. Leg Constant J., Bresseel J. & co. ( RBINS).

DESCRIPTION.

Male ( Fig. 3 A-C).

Length of body 23 mm. Whole body black. Tergites with posterior yellow stripe. Legs yellow. Wings hyaline with microtrichia on distal third.

Head. Face with yellow orange tomentum. Mystax with white setae and a few black setae on upper part. Frons with long, fine, white setae laterally. Ocellar tubercle with many fine black setae. Occiput with greyish tomentum, with stout black ocellar bristles and with white setae. Antenna, scape and pedicel orange with short black setae; scape twice as long as pedicel; postpedicel brown, shorter than scape; style fine and longer than scape, pedicel and postpedicel together. Proboscis shiny black with fine white setae on ventral part. Palpi black with long black setae.

Thorax. Antepronotum with white bristles and setae. Scutum with short black setae. Bristles black: 2 notopleural, 2 supra-alar, 2 post-alar, 8 dorso-central. Scutellum yellowish with long, white, fine setae on disc; 2 stout scutellar bristles. Katatergal and metepisternal setae white.

Wings. Hyaline with microtrichia on distal third.

Legs. Yellow with black bristles and white setae. Hind tarsus completely black. Femora not swollen, with some bristles: fore femora with 3 on ventral face, mid femora with 7 on inner face and hind femora with 2 on inner face. Fire and mid tibiae with fine long setae, hind tibiae and basal tarsomere tarsi with a short reddish brown brush.

Abdomen. Tergites and sternites dark with yellowish stripe and yellow chaetotaxy. Tergite I with long setae laterally and short ones in middle; tergite II with long lateral bristles and setae; tergite III with numerous bristles lateral; tergite VI with 4 very strong spurs. Sternites III with long bristles and setae.

Male genitalia ( Fig. 3 D-F). Black. Epandrium and gonocoxite with broad tuft of long black setae on lower part. Epandrium with a deep concavity and an inner structure formed by a neck bearing apically a small triangular-shaped structure covered anteriorly with microsetae. Aedeagus short, wider to lower part with the three distiphallus ducts fine and short.

Female: unknown.

BIOLOGY.

The species was collected in lowland rainforest during daytime. The habitat is illustrated Fig. 4 .

Figures

Fig. 2. Distribution map of Irianjaya luzonensis, I. mendax, I. sulaensis and I. sumbawaensis.

Fig. 3 A-H. A-F, Irianjaya luzonensis sp. nov., holotype, total length: 23 mm (photographs by P. Limbourg). A, habitus, dorsal view. B, habitus, lateral view. C, detail of ventral spurs of tergite VI. D, epandrium, internal view. E, phallus. F, gonocoxite and dististylus, external view. G-H, Irianjaya sumbawaensis. G, epandrium, internal view. H, gonocoxite and dististylus, external view.

Fig. 4. Habitat of Irianjaya luzonensis (photograph by A. Lefèvre).