Opeatocerata bare sp. nov.

(Figs 26–32)

Diagnosis. Yellow species; descendant plate of the anterior cercus with lateroventral projection in posterior view (Fig. 30); phallus with narrow base, wider towards the apex with large dorsal subapical appendix (Fig. 32).

Description. Male (Fig. 26). Head: Face slightly divergent toward the proboscis, dark brown, with gray pruinescence visible in ventral view, about 3X longer than lower width. Ocellar tubercle protrubeant, dark brown with brown pruinescence; ocelli brown. Antenna brown to black bristles; postpedicel about 2X longer than pedicel; stylus about 2X longer than postpedicel. Proboscis yellow shorter than head height. Thorax yellow, shiny (Fig. 26). Legs yellow, except by hind femur and tibia with apical black ring and all tarsomeres 4–5 black; hind tibia with anterodorsal and posterodorsal and anteroventral rows of longer bristles; hind tarsus with anterodorsal and posterodorsal rows of longer bristles. Wing (Fig. 27) hyaline; pterostigma brown, conspicuous, about 2.8X longer than wide. Halter yellow. Abdomen yellow, shiny (Fig. 26); tergite 8 divided in two subrectangular plates; sternite 8 divided in two trapezoidal plates. Terminalia: Anterior cercus with reclinate dorsal projection in lateral view (Fig. 28), subrectangular in dorsal view (Fig. 29); descendant plate with lateroventral projection in posterior view (Fig. 30). Posterior cercus with rounded apex in lateral view (Fig. 28) and pointed dorsal subbasal projection (Fig. 29). Hypoproct subtriangular in lateral view (Fig. 28) and comma-shaped in posterior view. Epandrial ventral lobe with apex slightly bilobed (Fig. 28); spiniform bristles mesially on dorsal lobe and longer bristles apically on ventral lobe (Fig. 28). Hypandrium longer than wide, with rounded apex, without long bristles. Phallus with narrow base, wider at mostly, longer than hypandrium, with large dorsal subapical appendix (Fig. 32). Subepandrial sclerite wider than long, U-shaped (Fig. 31). Bacilliform sclerite folded and longer than subepandrial sclerite (Fig. 31). Specimen length: 3.0 mm; wing length: 3.6 mm. Female. Unknown.

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

Type material. HOLOTYPE ♂, labelled: Brasil, Amazonas, Manaus, Rod[ovia] AM 0 10 Km 50. ZF-2, Km 14, Torre, 02º35’21’’S; 60º06’55’’W / 4.iii.2011. 03–06:00h. Arm[adilha] luz dossel, 40 m de altura. F.F Xavier Filho, J.T.Câmara, P.Dias (INPA). Paratypes: Brazil, Amazonas. idem, Km 27, entrada LBA 02º35’S; 60º06’W; 5.iii.2011. 18–21:00h. Arm[adilha] luz dossel 35 m. F.F. Xavier Filho, R.F.Freitas (1 ♂, INPA). Manaus, PDBFF / WWF. Proj[eto] Bert Klein / x.1985, Malaise / Reserva 1210 (1 ♂, INPA).

Holotype condition. Tarsomeres 2–5 of left hindleg lost; wing on microslide; abdomen in microtube with glycerin.

Etymology. The specific epithet is a noun in apposition and refers to the indigenous tribe called “ Baré ”, that lives in the northwest portion of the state of Amazonas.

Remarks. Opeatocerata bare sp. nov. is similar to O. zuleideae sp. nov. by the following shared characters: phallus with large dorsal subapical appendix (Figs 32, 209), anterior cercus with reclinate dorsal projection in lateral view (Figs 28, 205) and posterior cercus with pointed dorsal subbasal projection in dorsal view (Figs 29, 206). Differs from the latter by the tergites without spots (Fig. 26) and posterior cercus with rounded apex and without median subtriangular projection in lateral view (Fig. 28). Opeatocerata zuleideae sp. nov. has tergites with paramedian subrectangular black spots (Fig. 203) and posterior cercus with rounded apex and with median subtriangular projection in lateral view (Fig. 105).