Gondwanoscurus ejundicus (Quate)

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

Gondwanoscurus ejundicus (Quate)

( Figs. 10–13 )

Telmatoscopus ejundicus Quate, 1962 a, 4: 8 (original description); Duckhouse, 1973, 231 (Oriental catalog).

Diagnosis. Adult: Male antennae: scape approximately 2.5 times longer than wide; flagellomeres T-shaped, with nodes exserted laterally. Male terminalia: gonostyli bifurcate; rami digitiform, of subequal length, with apices rounded; basiphallus laterally compressed basally, bifid apically, with branches parallel; distiphallus comprised of paired, spinose sclerites; cercopodia elongate, about 12 times longer than wide, bearing 7 retinacula dorsoapically; retinacula with apices bifurcate. Female terminalia: hypovalvae with lobes broadly rounded, slightly longer than wide; subgenital plate with prominent bulge medially, with digitiform projections posterolaterally; bulge and anterior margin covered with alveoli.

Redescription. Adult Male. See Quate (1962a). ( Figs. 10–13 ): Measurements, (N = 1) head width 0.36 mm, head length 0.42 mm, wing length 1.80 mm, wing width 0.93 mm, palpomere proportion: 1–2.2–2.0–2.4. Head: frontal scar patch subquadrate anteriorly, bilobed posteriorly, without median spur; antennae with scape approximately 2.5 times longer than wide; flagellomeres T-shaped, with nodes exserted laterally. Wing: ovate, with posterior margin more convex than anterior; medial fork basal to radial fork, both arising basal to apex of CuA2. Terminalia: gonocoxites approximately 2.5 times longer than wide, widely separated at base; gonostyli bifurcate; rami digitiform, of subequal length, with apices rounded; lateral rami with apices curved medially; parameral sheath parallel-sided, expanded apically, not wider than distance between gonocoxal bases; basiphallus laterally compressed basally, bifid apically, with branches parallel; distiphallus comprised of paired, sinuous sclerites, articulated with basiphallus at apices of branches; sclerites of distiphallus each with longitudinal row of approximately 15 spines on their apical 1/3, arising from medial surface, directed medially, with 1 stout, articulated spine apically; cercopodia elongate, about 12 times longer than wide, bearing 7 retinacula dorsoapically; retinacula with apices bifurcate.

Adult Female. See Quate (1962a): Wing: strongly ovate, anterior and posterior margins equally convex, apex broadly rounded; M2 weakened at base. Terminalia: hypovalvae with lobes broadly rounded, slightly longer than wide; subgenital plate with prominent bulge medially, with digitiform projections posterolaterally; medial bulge and anterior margin covered with alveoli.

Type material. Holotype [adult male]: NORTH BORNEO [ MALAYSIA, SABAH]. Ranau, tree buttress, 6.x.1958, coll. L. W. Quate. Allotype [adult female] Ranau, W. Coast residency, seepage area, 6.x.1958, coll. L. W. Quate. Types deposited at BPBM.

Distribution. Known only from two locations in Sabah.

Remarks. Adult males of G. ejundicus are distinguished by the general structure of the terminalia, especially the elongate, bifurcate gonostyli and the spinose distiphallus. Females are separable by the obovate shape of the wings, and the subgenital plate with a median bulge and posterolateral projections. Adults of this species are most similar to those of G. cruciferus sp. nov. and G. malaysiensis .

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).

FIGURES 13 – 24. Gondwanoscurus eximius (Quate). 14. Male head, frontal view. 15. Male antennal flagellomere 8 with ascoids, left antenna, frontal view. 16. Male gonopods and phallus, ventral view. 17. Male cercopod and tenth tergite, dorsal view. 18. Wing. Gondwanoscurus mcclurei (Quate). 19. Male antennal scape, pedicel and flagellomeres 1 – 2, left antenna, frontal view. 20. Male gonopods and phallus, vental view. 21. Wing. Gondwanoscurus praecipuus (Quate). 22. Male antennal scape, pedicel and flagellomeres 1 – 3, left antenna, frontal view. 23. Male gonopods and phallus, dorsal view. 24. Wing. 25. Male cercopod and tenth tergite, dorsal view. Scale bars = 0.05 mm (15), 0.25 mm (14), 0.125 mm (16 – 17, 19 – 20, 22 – 23, 25), 0.5 mm (18, 21, 24).