Gondwanoscurus ornithostylus Curler

Curler, Gregory R., 2009, A revision of the genus Gondwanoscurus Jezek (Diptera: Psychodidae), Zootaxa 2169, pp. 21-34 : 26-28

Gondwanoscurus ornithostylus Curler sp. nov.

( Figs. 6–9 )

Diagnosis. Adult: Male antennae: scape approximately 3 times longer than wide; flagellomeres nodiform, with nodes exserted slightly laterally. Male terminalia: gonostyli simple, with apical 1/4 tapered, acuminate; basiphallus dorsoventrally compressed basally, bifid apically, with branches nearly parallel; distiphallus comprised of paired, acuminate, convergent sclerites; cercopodia with apical 1/4 curved approximately 90 dorsad, bearing approximately 15 retinacula dorsoapically; retinacula with apices simple. Female terminalia: tergite IX with prominent semi-circular depressions dorsolaterally, depressions covered with minute setiform sensilla; hypovalvae with lobes rounded, cordate; subgenital plate with prominent bulge medially, covered with alveoli medially and posterolaterally.

Description. Adult Male ( Figs. 6–7, 9 ): Measurements, (N = 2) head width 0.55 mm, head length 0.57 mm, wing length 3.23 mm (3.16–3.30), wing width 1.28 mm (1.22–1.35), palpomere proportion: 1–1.9–1.8–2.0. Head: frontal scar patch subquadrate anteriorly, bilobed posteriorly, without median spur; antennae with scape approximately 3 times longer than wide; flagellomeres nodiform, with nodes exserted slightly laterally. Wing: ovate; membrane with infuscation patches at forks and apices of longitudinal veins; with posterior margin slightly more convex than anterior; M2 weakened at base; medial fork basal to radial fork, radial fork arising apical to apex of CuA2. Terminalia: gonocoxites approximately 1.5 times longer than wide, with anterodorsal extensions touching medially; gonostyli simple, with a setose lobe at mid-length dorsally, with apical ¼ tapered, acuminate; parameral sheath broad, wider than long, not extending beyond gonocoxites; basiphallus dorsoventrally compressed basally, bifid apically, with branches nearly parallel; distiphallus comprised of paired, acuminate, convergent sclerites; cercopodia with apical 1/4 curved approximately 90° dorsad, bearing approximately 15 retinacula dorsoapically; retinacula with apices simple.

Adult Female ( Fig. 8 ): Wing: shape as in male; M2 weakened at base; infuscation as in male. Terminalia: tergite IX with prominent semi-circular depressions dorsolaterally, depressions covered with minute setiform sensilla; hypovalvae with lobes rounded, cordate; subgenital plate with prominent bulge medially, covered with alveoli medially and posterolaterally.

Type material. Holotype [adult male]: THAILAND. Chiang Mai Province: Doi Inthanon National Park, Kew Mae Pan, 18°33.163’N 98°28.8’E, 6–13.ix.2006, coll. Y. Areeluck, Malaise trap; deposited QSBG [T- 245]. Specimen dissected, mounted on micro-slide. Allotype [adult female]: same data as holotype, coll. Y. Areeluck; deposited QSBG [T-245]. Paratypes: same data as holotype [3 adult female (slides)], coll. Y. Areeluck; Doi Inthanon National Park, summit marsh, 18°35.361’N 98°29.157’E, 27.ix–5.x.2006, Malaise trap [1 adult male (slide)], coll. Y. Areeluck [T-351]. Paratypes deposited in QSBG and USNM.

Etymology. From the Greek ornitho, meaning "bird", and stylus, meaning "pointed instrument" in reference to the gonostyles of this species which resemble the head of a shore bird.

Distribution. Collected from two locations in northern Thailand.

Remarks. Adults of G. ornithostylus are distinguished by the elongate, ovate shape, and spotted appearance of the wing, and the structure of the male and female terminalia, specifically the male gonostyli with the medial bulge and acuminate apex, and the female tergite X with setose, circular depressions laterally.

Figures

FIGURES 6 – 12. Gondwanoscurus ornithostylus Curler sp. nov. 6. Male head, frontal view. 7. Wing. 8. Female terminalia, dorsal view (left), ventral view (right). 9. Male terminalia, dorsal view. Gondwanoscurus ejundicus (Quate). 10. Male head, frontal view. 11. Male gonopods and phallus, ventrolateral view. 12. Wing. 13. Male cercopod, lateral view. Scale bars = 0.25 mm (6, 10), 0.125 mm (8 – 9, 11, 13), 0.5 mm (7, 12). (abbreviation: tgX = tergite X).