Opeatocerata mourai sp. nov.

(Figs 129–137)

Diagnosis. Anterior cercus with pro and reclinate dorsal projections in lateral view (Figs 131, 132); hypoproct bacilliform in lateral view (Fig. 132); phallus subcylindrical, with sclerotized apex and a dorsal subbasal narrow appendix (Fig. 136).

Description. Male (Fig. 129). Head: Face slightly convergent toward the proboscis, dark brown, with gray pruinescence visible in ventral view, about 5X longer than lower width. Ocellar tubercle protuberant, dark brown with gray pruinescence; ocelli brown. Antenna yellow with black bristles; postpedicel about 1.5X longer than pedicel; stylus about 2.5X longer than postpedicel. Proboscis yellow shorter than head height. Thorax dark yellow, shiny (Fig. 129). Legs yellow, except for hind femur and tibia with apical black ring; hind tibia with anterodorsal and posterodorsal rows of longer bristles. Wing (Fig. 130) hyaline, pterostigma, black, conspicuous, about 2.5X longer than wide. Halter yellow. Abdomen dark yellow, shiny (Figs 129, 131); tergite 8 divided in two subrectangular plates; sternite 8 divided in two trapezoidal plates. Terminalia: Anterior cercus with a pro and reclinate dorsal projections in lateral view (Figs 131, 132), posterior margin with lateral projections in dorsal view (Fig. 133); descendant plate subtrapezoidal with lower margin slightly rounded in posterior view (Fig. 134). Posterior cercus with acuminate apex in lateral view (Figs 131, 132), without dorsal projection (Fig. 133). Hypoproct bacilliform in lateral view (Fig. 132) and comma-shaped in posterior view. Epandrial ventral lobe slightly bilobate at apex (Fig. 132); spiniform bristles mesially on dorsal lobe and longer bristles apically on ventral lobe (Fig. 132). Hypandium longer than wide, with concave apex (Fig. 137), without long bristles. Phallus subcylindrical, sclerotized apex, longer than hypandrium, with a dorsal subbasal narrow appendix (Fig. 136). Subepandrial sclerite wider than long, U-shaped (Fig. 135). Bacilliform sclerite without folds, longer than subepandrial sclerite (Fig. 135). Specimen length: 3.7 mm; wing length: 3.9 mm. Female. Unknown.

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

Type material. HOLOTYPE ♂, labelled: Brasil, AM[azonas], Barcelos, Rio Aracá, Boca do Rio Curuduri 00º05’50,2’’N; 63º17’22,3’’W. 15–19.vi.2010. Varredura. S. S. Oliveira, J.T. Câmara, V. Linard, J.A. Rafael (INPA). Paratypes: Brazil, Amazonas. same data as holotype (6 ♂, INPA; 2 ♂, NMWC). Barcelos, Rio Aracá, Com[unidade] Bacuquara 00º09’17.5’’N; 63º10’35.2’’W, Arm[adilha] luminosa dossel 25 m. 14.vi.2010, 00–03:00h, J.A. Rafael, P. Dias, R. Machado (1 ♂, MPEG).

Holotype condition. Right hind leg lost; left wing mounted on microslide; abdomen in microtube with glycerin.

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

Variation. Body length from 3.1–4.0 mm.

Remarks. Opeatocerata mourai sp. nov. is similar to O. agudeloi sp. nov. by the anterior cercus acuminate in lateral view (Figs 11, 132), epandrial lobe with bilobate apex (Figs 11, 119) and phallus with dorsal subbasal appendix (Figs 15, 136). Differs from the latter by anterior cercus with pro and reclinate dorsal projections in lateral view (Fig.132) and phallus without ventral appendix (Fig. 136). Opeatocerata agudeloi sp. nov. has the anterior cercus with only a proclinate dorsal projection in lateral view (Fig. 11) and phallus with central appendix originating on the distal 1/4 (Fig. 15).