Neohybos serratus, Ale-Rocha, 2016

Ale-Rocha, Rosaly, 2016, Species of Hybotinae from Podocarpus National Park, Ecuador (Diptera, Empidoidea, Hybotidae), Revista Brasileira de Entomologia 60 (3), pp. 189-205 : 195-196

Neohybos serratus sp. nov.

( Figs. 21–24 )

Diagnosis.Thorax black; scutum shiny with brown pruinescence laterally and on prescutellar disc. Postpedicel slender and fusiform. One posterior poorly developed dc pair of setae. Legs with apex of all femora yellow, fore tibia pale brown with base and apex yellow, mid tibia and all tarsomeres 1–2 pale yellow, hind tibia yellow on basal half and dark brown on apical half, all tarsomeres 3–5 and remaining parts brown to dark brown. Wing hyaline, stigma slightly brownish. Phallus deeply cleft distally with left branch saw-toothed.

Description. Holotype male (QCAZ). Body: 5.4 mm. Wing: 4.7 mm. Head. Postpedicel small, twice longer than wide, shorter than length of scape and pedicel combined. Face narrowly dichoptic, black, shorter than frons. Postcranium clothed in dense brown pruinescence; postocular setae elongate; occipital setae short, thin and somewhat numerous. Thorax black; scutum shiny, with a discreet metallic bluish shine, with pale-brown pruinescence laterally and on prescutellar disc. Pleura covered by dense pale-brown pruinescence. Acrostichal and dc setae uniserial, sparse, very thin and short, black; ial and spal setae sparse; 2 npl setae as long as apical scutellar pair; pal developed but shorter than npl setae; posterior dc pair poorly developed. Scutellum with 8 pairs of setae: one apical pair long, robust, parallel, widely separated; 6 slender lateral setae, half-length of apical pair; one pair of very thin and small parallel setae between the long apical pair. Legs: apex of all femora yellow, fore tibia pale brown with base and apex yellow, mid tibia and all tarsomeres 1–2 pale yellow, hind tibia yellow on basal half, all tarsomeres 3–5 and remaining parts brown to dark brown.Hind femur slightly thickened toward apex, claviform, clothed in sparse thin yellow setae; hind tibia nearly straight, cylindrical, setae brown. Fore tibia with 1A short and 1P preapical setae. Fore tarsomere 1 with 1A short and more robust seta and 1P preapical seta. Mid tibia with 2AD more robust and short setae on dorsal half and 1P long apical seta, reaching apex of tarsomere 1. Mid tarsomere 1 with 1 preapical short and robust AD seta, 1 V elongate sub-basal seta reaching apex of tarsomere 1. Hind trochanter with 1 robust spine-like seta. Hind femur with 2D setae on distal sixth; 1A seta on distal fifth; 9AV spine-like elongate setae; 13 V spine-like short setae with protuberant base, and the 9 distalmost, reduced to short and robust spines; PV series with 5 setae on basal third and 3 on apical third. Fore tarsomeres 1–4 with 1A short and robust basal seta. Hind tibia lacking strong setae. Wing narrow, hyaline with slightly brownish stigma; costal cell narrow; R 4+5 and M 1 parallel apically. Abdomen dark brown; shiny with brown pruinescence on tergite 1 and tergite 8, and very sparse brown pruinescence on sternites; about 3.5 times longer than length of thorax. Setulae thin and short, very sparse, inconspicuous dorsally, yellow; long setae on T1, on lateral of T2 and on distal margin of St 8. Terminalia ( Figs. 21–24 ) globose. Hypandrium short, distinctly narrow basally and wider distally, posterior margin somewhat concave, bearing some long and robust setae. Right epandrial lamella bearing long spine-like setae on distal margin, and large distal process; left epandrial lamella with large curved distal process with apex broadened in lateral view. Postgonite very slender, ribbon-like. Phallus unusual, long, narrower medially and deeply cleft distally, left branch bearing robust spines distally and a series of conspicuous tooth, saw-like lobes, on shaft.

Female. Unknown.

Type material. Holotype male (QCAZ). ECUADOR. Zamora Chinchipe, Estación Cientifica San Francisco [Reserva Biológica San Francisco], 0713956-9560588, Canal trail 1956 m, Varredura, 12–17/iv/2015, A. Plant & J. Camara Leg. Condition: good except by the right postpedicel and stylus, and ocellar pair of setae lost; terminalia dissected, stored within a microvial with glycerin.

Geographical distribution. Ecuador (Zamora Chinchipe).

Etymology. From the Latin serra = saw, in reference to the toothed saw-like apex of phallus.

Comments. This can be distinguished from all other species of Neohybos by the distinctive shape of the male terminalia, particularly the phallus which is narrower medially, deeply cleft distally with left branch saw-toothed distally.

Figures

Figs. 21–24. Neohybos serratus sp. nov.. Male hypopygium (holotype): 21, hypandrium and epandrium, ventral aspect (phallus and postgonites darkened); 22, epandrium and cerci, dorsal aspect; 23, 24, left and right epandrial lamellae, respectively, lateral aspect. Scale bar =0.3 mm.