Hemerodromia membranosa, 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 : 208

Hemerodromia membranosa sp. nov.

( Figs 36–43 )

Diagnosis. Similar to H. longilamellata . Phallus with membranous area covered with spicules and hook-like process apically ( Fig. 42 ); ejaculatory and gonocoxal apodemes very long ( Figs 39, 40, 42 ).

Description. Male ( Fig. 36 ). Head. Dark brown to black, antenna and mouthparts yellow with all setae whitish. Strongly dorsoventrally flattened; ocellar triangle with 1 pair of proclinate setae; anterior ocellus larger. Eyes iridescent black; close together on face bearing fine reclinate setulae. Frons with 1 frontal setula; 2–3 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 yellow setae. Antenna with scape and pedicel bearing distinct, short dorsal setulae; postpedicel about 1.3X as long as wide, stylus ~ 0.8X as long as postpedicel. Thorax ( Fig. 36 ). Elongate, slightly arched ventrally; thoracic dorsum yellow except brownish on prothoracic collar, narrowly behind postpronotal lobe, on scutum posterolaterally above wing base, and mediotergite; antepronotum with anterior margin almost straight and scutum with yellow setae, very small and fine except 1 notopleural. Legs ( Fig. 36 ). Whitish yellow. C1 ~ 1.1X longer than distance between C1 and C2, 6X as long as wide with some pale dorsoapical setae. F1 about 1.2X as long as C1, 4.0–4.5X as long as wide. Femoral formula 7/23–24/1+20–21/6–7; denticles confined to distal 0.8, becoming closer together distally, black, 2 rows linear, without distal discontinuity, converging apically and diverging at extreme apex. T1 ~ 0.7X as long as F1, evenly curved, ventral face shallowly concave; about 19–21 sharply pointed spinose setae ventrally; dorsal ciliation of decumbent short pale setulae, denser distally; without apicoventral extension on T1, with short black subapical spine. Mid- and hind legs slender with fine setae; T3 with ‘comb’ of short setae posteroapically. Wing ( Fig. 37 ). Membrane slightly yellow, veins brownish; R2+3 long and straight, not strongly curved towards C apically, joining C ~ 0.7 distance between end of R1 and R4+5; R4+5 fork angle acute (~ 60°); distal to position of M1+2 fork by about 2.0X as long as R4; R5 and M1 almost parallel; 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. 36 ). Tergites 1–6 and 8 brownish; tergite 7 and sternites yellowish. Tergite 8 longer than sternite 8; membranous area between segment 8 and terminalia. Terminalia. Cercus brown, narrow, pointed apically ( Figs 38, 39 ), left and right cerci separated anterodorsally ( Fig. 40 ), with distinct setae on outer face. Epandrium wide, subrectangular with rounded apex ( Fig. 39 ); with scattered setae on outer face. Surstylus subrounded, with distinct setae apically ( Fig. 41 ); articulated to hypandrium by weak point anteriorly. Hypandrium yellow, rather subtriangular, not markedly inflated, with distinct setae ( Figs 41, 43 ); gonocoxal apodeme very long, projecting much beyond anterior margin of hypandrium ( Figs 39, 40 ). Subepandrial sclerite with quadrate anterior margin, with median rounded process posteriorly. Phallus sclerotized basally, with pointed dorsal projection apically and membranous area covered with spicules and hook-like process apically ( Fig. 42 ). Ejaculatory apodeme unilamellar, flattened plate laterally, ~0.5X as long as gonocoxal apodeme ( Figs 39, 40 ). Specimen length: 2.7 mm; wing length: 2.3 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 ♂, INPA, 4 ♂, CZMA). Idem, 13–17.xi.2012. F. Limeira-de-Oliveira, D.W.A. Marques, cols. (2 ♂, MNWC).

Holotype condition. Good. Not dissected.

Etymology. From the Latin membranaceus, referring to the apical membranous area on the phallus.

Variation. Paratypes with body length varying from 2.1–3.5 mm and wing length varying from 1.2–1.8 mm.

Remarks. Hemerodromia membranosa sp. nov. appears to belong to the same group of species that includes H. lamellata , H. longilamellata and H. megalamellata sp. nov., which share very long ejaculatory and gonocoxal apodemes. Hemerodromia membranosa sp. nov. is similar to H. longilamellata by having the cercus pointed apically ( Fig. 39 ) and epandrium rounded apically ( Fig. 39 ). Hemerodromia membranosa sp. nov. differs from H. megalamellata sp. nov. by phallus with membranous area covered with spicules and hook-like process apically ( Fig. 42 ). The phallus of H. longilamellata has a narrow membranous area apically and lacks scattered spicules ( Câmara et al., 2014, fig. 60).

Figures

FIGURES 36 – 43. Hemerodromia membranosa sp. nov., 36 – 37, holotype ♂. 38 – 43, paratype ♂. 36, habitus, lateral view; 37, wing; 38, abdomen from tergite 5 to terminalia, lateral view; 39, terminalia, lateral view; 40, terminalia, dorsal view; 41, terminalia, ventral view; 42, phallus, gonocoxal apodeme and hypandrium, lateral view; 43, hypandrium and phallus, ventral view.