Hemerodromia collini, 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 : 216-218

Hemerodromia collini sp. nov.

( Figs 25–31 )

Diagnosis. Best distinguished by the R4+5 fork distal to the position of the M1+2 fork, shorter than the length of R4 ( Fig. 26 ); shape of the male cercus being incurved apically, longer than epandrium in lateral view ( Fig. 28 ) and phallus with two posterolateral pointed projections ( Fig. 30 ).

Description. Male ( Fig. 25 ). 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 which bears fine reclinate setulae. Frons with 1–2 setulae; one pair of distinct vertical setae contiguous with uniseriate smaller 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. 25 ). Elongate, slightly arched ventrally; dorsum yellow, except brownish on mediotergite and median stripe on prothoracic collar; antepronotum with anterior margin almost straight; scutum with yellow setae, very small and fine except 1 notopleural. Legs ( Fig. 25 ). Whitish yellow. C1 ~ 1.4X longer than distance between C1 and C2, 6X as long as wide. F1 ~ 1.1X as long as C1, 4X as long as wide. Femoral formula 7/16–17/1+14–15/5; denticles confined to distal 0.7, 2 rows linear, black, without distal discontinuity, converging distally but divergent at tip. T1 ~ 0.6X as long as F1, evenly curved, ventral face shallowly concave; with 2 rows of 15–18 sharply pointed spinose setae ventrally; dorsal ciliation of decumbent short pale setulae, denser distally; slight 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 ( Fig. 26 ). Membrane faintly yellow, veins yellowish; R2+3 long and straight, not strongly curved towards C apically, joining C ~ 0.7–0.8 distance between end of R1 and R4; R4+5 fork acute (~ 60°), distal to position of M1+2 fork by shorter than R4; R5 and M1 diverging distally; vein R5 ~ 3X as long as R4; cell bm+dm short, ending at level of R1, ~ 2X as long as cell br. Halter whitish yellow. Abdomen ( Figs 25, 27 ). Tergites 1 and 7 and sternites yellowish, tergites 2–6 and 8 brownish with distinct setae on posterior margin; tergite 8 shorter than sternite 8. Terminalia. Brownish. Cercus narrow, curved up distally with rounded apex ( Figs 27, 28 ); left and right cerci closely approximated anterodorsally ( Fig. 29 ). Epandrium wide, subrectangular in lateral view, with strong setae on outer face at apex ( Fig. 28 ). Surstylus ( Fig. 29 ) bilobed, with spine-like setae on inner face of outer lobe. Hypandrium rather rounded in ventral view ( Fig. 31 ), not markedly inflated, with distinct setae; gonocoxal apodeme confined to anterior margin of hypandrium, lacking narrow process. Subepandrial sclerite concave on anterior margin, two short finger-like posterior processes with long setae at apex ( Fig. 29 ). Phallus sclerotized with two posterolateral pointed projections, extending well beyond hypandrium apex, apical membranous area covered with minute dark spicules ( Fig. 30 ). Ejaculatory apodeme absent. Body length: 3.1 mm; wing length: 2.4 mm. Female: Unknown.

Type material: HOLOTYPE ♂ “ BRASIL, Amazonas, Manaus, R.[eserva] Ducke, 5.viii.1993. Ig.[arapé] Acará. Malaise J. Vidal” ( INPA). PARATYPES. Same data as holotype (4 ♂, MZUSP); Idem, 2.ix.1993 (3 ♂, NMWC); Idem, x.2001, Arm. Malaise, J.F. Vidal (7 ♂, INPA, 4 ♂, MNRJ, 3 ♂, CNC); Idem, Ig. Tinga. Arm. Malaise, iii.2003, J.M.E.Ribeiro, J. Vidal & J. Vidal (1 ♂, MPEG).

Holotype condition. Good condition. Not dissected.

Etymology. The specific epithet is in tribute to J.E. Collin in recognition of his contribution to the knowledge of the Neotropical fauna of Empididae .

Variations. Body varying from 2.8 mm to 3.6 mm. Wing length varying from 2 mm to 2.5 mm.

Remarks. Hemerodromia collini sp. nov. is similar to H. maturaca sp. nov. by the R4+5 fork distal to the position of the M1+2 fork, shorter than the length of R4; subepandrial sclerite with 2 finger-like posterior processes; and epandrium subrectangular. Hemerodromia collini sp. nov. differs from the latter by the shape of the male cercus being incurved apically, and phallus with 2 posterolateral pointed projections. In H. maturaca sp. nov. the cercus is almost straight apically and phallus have no posterolateral pointed projections.

Figures

FIGURES 25 – 31. Hemerodromia collini sp. nov., 25, holotype ♂. 26 – 31, paratype ♂. holotype ♂. 25. habitus, lateral view; 26. wing. 27. abdomen from segment 4 to terminalia, lateral view; 28. terminalia, lateral view; 29. cercus, subepandrial sclerite and surstylus, dorsal view; 30. phallus, lateral view; 31. hypandrium, phallus and epandrium, ventral view.