Opeatocerata hadrophallus, Câmara, J. T. & Rafael, J. A., 2014

Câmara, J. T. & Rafael, J. A., 2014, Revision of Opeatocerata Melander, 1928 (Diptera: Empididae: Empidinae), Zootaxa 3846 (4), pp. 502-546 : 521

Opeatocerata hadrophallus sp. nov.

( Figs 90–99)

Diagnosis. Tergites 3–6 with paramedian subtriangular black spots ( Fig. 93); descendant plate of the anterior cercus subtrapezoidal with a small median constriction in posterior view ( Fig. 96); phallus with narrow base, wider in mostly, pointed apically; short, not extending beyond the hypandrium ( Fig. 98).

Description. Male ( Fig. 90). Head: Face parallel-sided, dark brown with gray pruinescence visible in ventral view, about 4 X longer than lower width. Ocellar tubercle protuberant, dark brown with brown puinescence; ocelli brown. Antenna yellow with black bristles; postpedicel about 1.5 X longer than pedicel; stylus about 2 X longer than postpedicel. Proboscis yellow shorter than head height. Thorax yellow, shiny ( Fig. 90). Legs yellow, except by hind femur and tibia with black apical ring and all tarsomeres 4–5 black; hind tibia and tarsus with anterodorsal and posterodorsal rows of longer bristles. Wing ( Fig. 91) hyaline, pterostigma brown, conspicuous, about 2.2 X longer than wide. Halter yellow. Abdomen yellow, shiny; tergites 3–6 with paramedian subtriangular black spots ( Fig. 93); tergite 8 divided in two subrectangular plates; sternite 8 divided in two trapezoidal plates. Terminalia: Anterior cercus with a proclinate dorsal projection in lateral view ( Figs 92, 94), posterior margin rounded in dorsal view ( Fig. 95); descendant plate subtrapezoidal with a small median constriction in posterior view ( Fig. 96). Posterior cercus rounded at apex in lateral view ( Figs 92, 94), with dorsal, subbasal, pointed projection ( Fig. 95). Hypoproct subtriangular in lateral view ( Fig. 94) and comma-shaped in posterior view ( Fig. 96). Epandrial ventral lobe rounded at apex ( Figs 94, 94); spiniform bristles mesially and longer bristles apically. Hypandrium wider than long with rounded apex and small median sinus ( Fig. 99), without long bristles. Phallus with narrow base, wider in mostly, pointed apically; short, not extending beyond apex of the hypandrium ( Fig. 98). Subepandrial sclerite wider than long, U-shaped ( Fig. 97). Bacilliform sclerite without folds and longer than subepandrial sclerite ( Fig. 97). Specimen length: 2.6 mm; wing length: 2.6 mm. Female. Unknown.

Geographical distribution. Brazil (Amazonas) ( Fig. 211).

Type material. HOLOTYPE ♂ labelled: Brasil, AM[azonas], Novo Aripuanã, Reserva / Sokagakai, 23.iv. 2000. J. Vidal, Arm.[adilha] Malaise ( INPA). Paratypes: Brazil, Amazonas. Parnajaú, Rio Papagaio. vi. 2001. Mata terra-firme. 2 º00’03’’S 62 º 43 ’ 54 ’’W / Arm[adilha] malaise. Henriques, Vidal e Silva leg (1 ♂, INPA).

Holotype condition. Wing mounted in microslide; left mid leg, hind legs; abdomen in microtube with glycerin.

Etymology. From the Greek hadros (robust) and phallos (phallus), referring to the robust phallus.

Remarks. Opeatocerata hadrophallus sp. nov is similar to O. stubbsi by the short phallus, not extending beyond the apex of the hypandirum ( Figs 98, 178) and posterior cercus with a dorsal pointed projection in dorsal view ( Figs 95, 175). Differs from the latter by tergites with paramedian triangular spots ( Fig. 93), posterior cercus without dorsal subapical projection ( Fig. 95) and hypoproct subtriangular in lateral view ( Fig. 94). Opeatocerata stubbsi has tergites with paramedian subrectangular spots ( Fig. 173), posterior cercus with dorsal subapical subtriangular projection in dorsal view ( Fig. 175) and hypoproct subrounded in lateral view ( Fig. 174).