Leptodromia nebulosa, Barros & Sinclair & De Freitas-Silva & Ale-Rocha, 2024

Barros, Luana M., Sinclair, Bradley J., De Freitas-Silva, Rafael A. P. & Ale-Rocha, Rosaly, 2024, Revision of the genus Leptodromia Sinclair & Cumming, 2000 (Diptera: Hybotidae: Ocydromiinae), with the description of six new species, Records of the Australian Museum 76 (3), pp. 133-150 : 145-146

Leptodromia nebulosa

Barros & Sinclair sp. nov.

urn:lsid:zoobank.org:act:0471FBA3-FE9B-4FFE-BD53-652CA8759F2D

Figs 26–29 , 42

Diagnosis. Antenna with postpedicel elongate, stylus less than half-length of postpedicel. Scutum yellow, with pair of large rectangular black spots on prescutellar disc; pleura yellow with dark spot of posterior margin of anepisternum extending to dorsal margin. Legs yellow, hind femur with brown subapical band, hind tibia brown.Abdomen dark, with yellow posterior band on tergites, broader laterally, without dark medial stripe.

Description. Holotype male ( Fig. 26 ). Body length: 3.1 mm. Wing length: 3.1 mm. Head. Ocellar triangle shiny, not protuberant, with pair of short, slender proclinate ocellar setae and pair of shorter posterior setae [lost on holotype]. Frons shiny, dark brown with pruinosity on lower half. Face with dense grey microtrichia. Antenna ( Fig. 28 ) brown, except inner margin of scape and pedicel paler and shiny; postpedicel elongate, covered with dense brown microtrichia; arista-like stylus brown, with microtrichia, about less than half length of postpedicel. Proboscis yellowish; palpus oval, yellow, covered with dense yellow pruinosity and long, slender yellow setae. Occiput shiny brown ( Fig. 29 ); two rows of short, slender yellow setae, 1 row postoculars and 1 row occipital, lower setae longer. Thorax. Antepronotum yellow, with row of short, slender yellow setae. Scutum yellow, except for two large rectangular black spots on prescutellar disc ( Fig. 29 ). Scutellum yellow; mediotergite and laterotergite dark, with yellowish medially. Pleura yellow with dark vertical spot on posterior margin of anepisternum, extending to dorsal margin. Wing. Broad, membrane hyaline; pterostigma brownish, elongated and narrow, situated at apex of cell c. Cell dm more than 3 times longer than wide; M 1 short, extending less than half way to wing margin; M 2 and M 4 reaching wing margin; CuA+CuP long, curved, not reaching wing margin. Halter whitish yellow. Legs. Yellowish, except femora with anterior brown band on apical fourth; apex of mid and hind femora black, tibiae, especially hind tibia and tarsi brownish, increasingly darker apically. Mid and hind tarsomeres 3–5 slightly broader than fore tarsomeres, ventrally flattened. Hind femur with brown subapical band ( Figs 26, 27 ). Fore femur with anteroventral row of long slender setae. Mid and hind femora with anteroventral and posteroventral row of pale setae; apex with preapical anterodorsal seta. Mid and hind tibiae with 1 basal anterodorsal seta; near mid-length with 1 anterodorsal and 1 posterodorsal seta. Mid tibia with long apical posteroventral seta, length nearly twice width of tibia. Abdomen ( Figs 26, 27 ). Brown, posterior margins of tergites with pale band, broader laterally. Male terminalia: not dissected. Female ( Fig. 27 ). Similar to male. Female terminalia: not dissected.

Type material. Holotype ♂, labelled: “ AUSTRALIA: Queensland / Tully River Falls Road [-17.72, 145.54]/ Misty Mountain Trail / 12.IX.2004, s.s., Q-11/ L. Masner, rainforest”; “Australian Museum/ K 627872”; “ HOLOTYPE / Leptodromia / nebulosa / Barros & Sinclair [red label]” ( AMS) . Holotype in good condition. Paratypes: Australia. Queensland: same data as holotype, except K 627873 (1 ♀, AMS) ; 14.7 km up Mt. Lewis Rd , 880 m, 16.iv.1994, cascading creek, 16°30'S 145°17'E, B.J. Sinclair (1 ♀, CNC) ; Wooroonoonan NP, 17°34'06"S 146°42'21"E, 500 m, 25–26. ix.2004, YPT, rainforest, L. Masner (1 ♀, CNC) .

Etymology. From Latin “ nebula ” (mist), in reference to type locality.

Distribution. This species is known only from the Wet Tropics rainforest in northeastern Queensland ( Fig. 42 ).

Figures

Figure 42. Geographical records of Leptodromia Sinclair & Cumming, 2000.

Figures 26–29. Leptodromia nebulosa sp. nov. (26) Male holotype, lateral habitus; (27) Female paratypes, lateral habitus; (28) Female paratype, head, lateral view; (29) Male holotype, head and scutum, dorsal view.