Hemerodromia amazonensis, Câmara, J. T., Plant, A. R. & Rafael, J. A., 2014

Câmara, J. T., Plant, A. R. & Rafael, J. A., 2014, Neotropical Hemerodromia Meigen (Diptera: Empididae), a world of discovery I: new generic record and new species from Brazilian Amazon Basin, Zootaxa 3893 (2), pp. 209-231 : 210-212

Hemerodromia amazonensis sp. nov.

( Figs 1–8 )

Diagnosis. F1 with basiventral denticle, with adjacent basal spines stronger ( Fig. 2 ); epandrium fused with hypandrium ( Fig. 8 ); surstylus complex, subovate lobe with spine-like setae at tip on inner face ( Fig. 6 ).

Description. Male ( Fig. 1 ). Head. Dark brown to black, antenna and mouthparts yellow with all setae whitish; ocellar triangle with 1 pair of proclinate setae; anterior ocellus larger. Eyes iridescent black, very narrowly separated on face bearing fine reclinate setulae. Frons with 3 setulae; small vertical setae contiguous with uniseriate postocular setae. Occiput bearing scattered fine hairs. Clypeus with rather dense short downwardly directed pile. Proboscis slightly curved, with setae yellow. Antenna with scape and pedicel bearing distinct short dorsal setulae; postpedicel about 1.5X as long as wide, stylus ~ 0.8X as long as postpedicel. Thorax ( Fig. 1 ). Elongate, slightly arched ventrally, dorsum yellow except brownish on prothoracic collar, narrowly behind postpronotal lobe, suture between katepisternum and meron; antepronotum with anterior margin almost straight; scutum with yellow setae, very small and fine except one notopleural. Legs ( Fig. 1 ). Whitish yellow. C1 ~ 1.4X longer than distance between C1 and C2, 6X as long as wide with some pale dorsoapical setae. F1 ~ 1.1X as long as C1, 3.5–4.0X as long as wide; femoral formula 7/23/1 +21/5, basal spines stronger ( Fig. 2 ); denticles confined to distal 0.7, 2 rows linear, black, without distal discontinuity, converging distally but divergent at tip. T1 ~ 0.8X as long as F1, evenly curved, ventral face shallowly concave; with 2 rows of 17–21 sharply pointed spinose setae ventrally; dorsal ciliation of decumbent short pale setulae, denser distally; with small apicoventral extension on T1 bearing strong apical spine.

Mid and hind legs slender with fine setae but T3 with ‘comb’ of short setae posteroapically. Wing. Membrane faintly yellow, veins brownish; R2+3 long and straight, not strongly curved towards C apically, joining C ~ 0.8X distance between end of R1 and R4; R4+5 fork angle acute (~ 60°), distal to position of M1+2 fork by ~ 2X as long as R4; R5 and M1 convergent distally; vein R5 ~ 2X as long as R4; cell bm+dm short, ending at level of R1, ~2.0X as long as cell br. Halter whitish yellow. Abdomen ( Figs 1, 3 ). Tergites 1–6 and 8 brownish; tergite 7 and sternites yellowish. Tergites with distinct setae on posterior margin; tergite 8 slightly shorter than sternite 8. Terminalia. Brown. Cercus with subbasal pointed projection, rounded at apex and distinctly setose on outer face ( Figs 4 ); right and left cerci close together dorsally ( Fig. 5 ). Epandrium wide, subtriangular ( Fig. 4 ), scattered setae on outer face, fused with hypandrium ( Fig. 8 ). Surstylus present, complex, subovate lobe, with spine-like setae at tip on inner face ( Figs 4, 6, 8 ). Hypandrium rather subtriangular ( Fig. 8 ), without distinct setae; gonocoxal apodeme projecting as narrow process just beyond anterior margin of hypandrium ( Fig. 4 ). Subepandrial sclerite wide, with subquadrate anterior projection and two subtriangular posterior processes ( Fig. 6 ). Phallus ( Fig. 7 ) sclerotized basally, extending just beyond hypandrium, with pointed dorsal projection apically and apical short membranous area with scattered spicules. Ejaculatory apodeme absent. Body length: 3.5 mm; wing length: 2.9 mm. Female. Unknown.

Type material. HOLOTYPE ♂ “ BRASIL, AM[azonas], S.[ão] Gabriel da Cachoeira, Ig.[arapé] Maturacá , Malaise. 4.iv.1995, Fernanda” ( INPA). PARATYPE: Idem, Manaus, PDBFF /WWF, Proj: Bert Klein, v.1986, Malaise, Reserva 1301 (1 ♂, INPA).

Holotype condition. Right postpedicel and notopleural setae lost. Wing mounted on microslide. Terminalia in microtube with glycerin.

Etymology. The specific epithet refers to the State “Amazonas” where the specimens were collected.

Variation. Paratype with body length: 3.2 mm; wing length: 2.6 mm.

Remarks. Hemerodromia amazonensis sp. nov. differs from other species principally by the fusion of the epandrium to the hypandrium.

Figures

FIGURES 1 – 8. Hemerodromia amazonensis sp. nov., holotype ♂. 1. habitus, lateral view; 2. fore femur and tibia; 3. abdomen from segment 4 to terminalia; 4. terminalia, lateral view; 5. cercus, dorsal view; 6. subepandrial sclerite, surstylus and epandrium, dorsal view; 7. phallus, lateral view; 8. hypandrium, epandrium and surstylus, ventral view.