Hemerodromia mourai, 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 : 210

Hemerodromia mourai sp. nov.

( Figs 44–50 )

Diagnosis. Yellow species. Fore femur with 2 basiventral denticles; cercus greatly enlarged, suboval in lateral view ( Fig. 46 ) and with row of spine-like setae ventrally ( Fig. 48 ); subepandrial sclerite with two long, sclerotized posterior process ( Figs 46, 48 ).

Description. Male ( Fig. 44 ). 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 1–2 frontal setulae; 1 pair of distinct vertical setae contiguous with uniseriate row of smaller postocular setae. Occiput bearing scattered fine hairs. Clypeus with rather dense, short downwardly directed pile. Proboscis slightly curved with yellow setae. 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. 44 ). Elongate, slightly arched ventrally; thoracic dorsum yellow except brownish on prothoracic collar, narrowly behind postpronotal lobe, on scutum posterolaterally above wing base, anatergite, suture between katepisternum and meron, katepisternum ventrally behind C1, laterally on scutellum and mediotergite; antepronotum with anterior margin almost straight and scutum with yellow setae, very small and fine except 1 notopleural and 2 pairs of scutellars. Legs ( Fig. 44 ). Whitish yellow. C1 ~ 1.3X longer than distance between C1 and C2, 6X as long as wide with some pale dorsoapical setae. F1 about 1.1X as long as C1, 3.0–3.5X as long as wide. Femoral formula 7–8/16–17/2+20–21/7; denticles confined to distal 0.9, becoming closer together distally, black, 2 rows linear, without distal discontinuity, diverging abruptly at extreme apex. T1 ~ 0.7X as long as F1, evenly curved, ventral face shallowly concave; about 20–23 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. 45 ). Membrane slightly 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+5; R4+5 fork acute (~ 60°), distal to position of M1+2 fork by about same length as R4; R5 and M1 convergent distally, diverging slightly at extreme apex; R5 ~ 2X as long as R4; cell bm+dm short, ending at level of R1, ~ 2X as long as cell br. Halter whitish yellow. Abdomen ( Fig. 44 ). Tergites 1–6 brown; tergites 7–8 and sternites yellow; tergite 8 shorter than sternite 8. Terminalia. Brownish ( Fig. 46 ). Cercus greatly enlarged, suboval with small median projection apically ( Fig. 46 ), left and right cerci closely approximated anterodorsally, distinctly setose on outer face and spine-like setae ventrally ( Fig. 47 ). Epandrium narrow, rather inflated basally, narrower apically, with distinct, strong row of setae on outer face ( Fig. 46 ); articulated to the hypandrium by weak point anteriorly. Surstylus absent. Hypandrium subrectangular ( Fig. 50 ), not markedly inflated, with strong setae; gonocoxal apodeme projecting as narrow process just beyond anterior margin of hypandrium ( Fig. 46 ). Subepandrial sclerite with 2 lateral sclerotized, very long finger-like posterior processes with setae apically ( Fig. 48 ). Phallus strongly sclerotized basally, extending well beyond hypandrium apex, with apical membranous area covered with spicules ( Fig. 49 ). Ejaculatory apodeme absent. Specimen length: 2.9 mm; wing length: 2.5 mm. Female. Unknown.

Geographic distribution. Brazil (Ceará State).

Type material. HOLOTYPE ♂, “ Brazil, CE[Ceará], Ubajara, P.[arque] N.[acional] Ubajara, Cachoeira do Cafundó. 03º50'13''S – 40º54'35''W, Malaise, 20–22.vii.2012. J.A.Rafael & F.Limeira-de-Oliveira.” ( CZMA). Paratypes: Same data as holotype (5 ♂, CZMA, 2 ♂, INPA). Idem, 13–17.xi.2012. F. Limeira-de-Oliveira, D.W.A. Marques, cols. (3 ♂, MNWC, 8 ♂, INPA, 5 ♂, MNRJ).

Holotype condition. Good. Not dissected.

Etymology. The specific epithet is in tribute to Antonio Moura, the senior author's husband, partner and friend, for his contribution during this work.

Variations. Body length varying from 2.4–3.6 mm and wing length varying from 1.3–2.9 mm.

Remarks. Hemerodromia mourai sp. nov. appears to belong to the informal melangyna species - group (sensu Vaillant & Gagneur, 1998: 376) in having the cercus greatly enlarged, fore tibia without an apical extension but with a long, slender and pointed apical spine. Hemerodromia mourai sp. nov. is similar to H. cercusdilatata Câmara, Plant & Rafael, 2014 in having tergites 7–8 and sternites yellow, fore tibia with 2 rows of pointed spinose setae ventrally, subepandrial sclerite with 2 finger-like posterior processes and similar shaped epandrium. In H. mourai sp. nov. fore femur has 2 basal denticles; cercus suboval ( Fig. 46 ) and with row of spine-like setae ventrally ( Fig. 48 ); and epandrium with a long, stronger seta at apex ( Fig. 46 ). In H. cercusdilatata the fore femur is without basal denticles; the cercus has with a bluntly pointed apical process incurved with serrate posteroapical margin ( Câmara et al. 2014, fig. 20), and without spine-like setae ventrally; and epandrium with a spine-like setae on inner face ( Câmara et al. 2014, fig. 22).

Figures

FIGURES 44 – 50. Hemerodromia mourai sp. nov., 44 – 45 holotype ♂. 46 – 50, paratype ♂. 44, habitus, lateral view; 45, wing; 46, terminalia, lateral view; 47, cercus, ventral view; 48, epandrium and subepandrial sclerite, ventral view; 49, phallus and hypandrium, lateral view; 50, terminalia, ventral view.