Hemerodromia carioca, Câmara, Josenir T., Takiya, Daniela M., Plant, Adrian R. & Rafael, José A., 2015

Câmara, Josenir T., Takiya, Daniela M., Plant, Adrian R. & Rafael, José A., 2015, Neotropical Hemerodromia Meigen (Diptera: Empididae), a world of discovery II: New species from Atlantic forest, Brazil, Zootaxa 4028 (2), pp. 197-214 : 200-202

Hemerodromia carioca sp. nov.

( Figs 8–14 )

Diagnosis. Yellow species; fore femur with basiventral denticle; M2 reduced, weak, appearing as fold ( Fig. 2 ); cercus slightly bifid at apex and surstylus with strong setae at apex and spine-like setae on inner face ( Figs 12, 14 ).

Description. Male. Head ( Fig. 8 ). 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 bearing fine reclinate setulae. Frons with 1–2 frontal setulae; 3 pairs of vertical setae contiguous with uniseriate row of 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 ~ 1.2X as long as postpedicel. Thorax ( Fig. 8 ). Elongate, slightly arched ventrally; thoracic dorsum yellow, except brownish on prothoracic collar, narrowly behind postpronotal lobe, katepisternum ventrally behind C1, and mediotergite; antepronotum with anterior margin almost straight and scutum with yellow setae, very small and fine except one notopleural. Legs ( Fig. 8 ). Whitish yellow. C1 ~ 1.2X longer than distance between C1 and C2, 6X as long as wide with few pale dorsoapical setae. F1 about 1.1X as long as C1, 4.5–5.0X as long as wide. Femoral formula 5–6/19–20/1+20– 21/4, basal spines stronger; denticles confined to distal 0.8, becoming closer together distally diverging abruptly at extreme apex, black, 2 rows, without distal discontinuity. T1 ~ 0.7X as long as F1, evenly curved, ventral face shallowly concave; about 16–18 sharply pointed spinose setae ventrally; dorsal ciliation of decumbent short pale setulae, denser distally; without apicoventral extension on T1 but with strong apical spine. Mid- and hind legs slender with fine setae; T3 with ‘comb’ of short setae posteroapically. Wing ( Fig. 9 ). Membrane slightly yellow, veins yellowish; R2+3 long and straight, not strongly curved towards C apically, joining C ~ 0.7 distance between end of R1 and R4; R4+5 fork angle acute (~ 70°), distal to position of M1+2 fork by about 1.5X length as R4; M2 reduced, weak, appearing as fold; R5 and M1 convergent distally and diverging at extreme apex; R5 ~ 2.5X as long as R4; cell bm+dm long, ending just before R1, ~2.0X as long as cell br. Halter whitish yellow. Abdomen ( Fig. 8 ). Tergites 1–6 and 8 brownish; tergite 7 and sternites yellowish. Tergites 7–8 with pale, strong setae laterally on posterior margin; tergite 8 shorter than sternite 8. Terminalia. Brown. Cercus slightly bifid at apex ( Fig. 10 ), left and right cerci closely approximated anterodorsally ( Fig. 11 ), distinctly setose on outer face. Epandrium widened basally, progressively narrowing towards apex, scattered setae on outer face ( Fig. 10 ); articulated to hypandrium by weak point anteriorly. Surstylus rounded, with stronger setae at apex and spine-like setae on inner face ( Figs 12, 14 ). Hypandrium subrectangular ( Fig. 14 ), inflated, lacking distinct setae; gonocoxal apodeme projecting as narrow process just beyond anterior margin of hypandrium ( Figs 10, 13 ). Subepandrial sclerite with median subtriangular projection anteriorly and median short finger-like posterior process ( Fig. 12 ). Phallus sclerotized basally, extending just beyond hypandrium apex, with membranous area ventrally starting near of base ( Fig. 13 ). Ejaculatory apodeme absent. Specimen length: 2.5 mm; wing length: 1.9 mm. Female. Unknown.

Geographic distribution. Brazil (Rio de Janeiro State).

Type material. HOLOTYPE ♂, “BR[azil], RJ[Rio de Janeiro], Teresópolis, P.[arque] N.[acional] Serra dos Órgãos, Est.[ação] barragem. 1000 m, 15–18.ix.2011, Malaise. D.M. Takiya & A.P.M.Santos.” ( INPA). Paratypes: Same data as holotype (1 ♂, MNRJ).

Holotype condition. Abdomen in microtube with glycerin.

Etymology. The specific epithet refers to name given to the inhabitants of Rio de Janeiro State, where the specimens were collected.

Variations. Paratype with body length: 2.3 mm and wing length 1.6 mm.

Remarks. Hemerodromia carioca sp. nov. differs from other species by M2 reduced, weak, appearing as fold ( Fig. 9 ); cercus slightly bifid at apex ( Fig. 10 ); and surstylus with strong setae at apex and spine-like setae on inner face ( Figs 12, 14 ).

Figures

FIGURES 8 – 14. Hemerodromia carioca sp. nov., holotype ♂. 8., habitus, lateral view; 9, wing; 10, terminalia, lateral view; 11, terminalia, dorsal view; 12, subepandrial sclerite, epandrium and surstylus, dorsal view; 13, phallus, ejaculatory apodeme, gonocoxal apodeme, hypandrium, lateral view; 14, terminalia, ventral view.

FIGURES 1 – 7. Hemerodromia brevicercata sp. nov., 1 – 2, holotype ♂. 3 – 7, paratype ♂. 1, habitus, lateral view; 2, wing; 3, terminalia, lateral view; 4, subepandrial sclerite and epandrium, dorsal view; 5, terminalia, ventral view; 6, phallus, lateral view; 7, apex of the phallus and apex of epandrium, dorsal view.