Opeatocerata lopesi Smith

(Figs 100–113)

Opeatocerata lopesi Smith, 1989: 514; Yang et al., 2007: 146 (cat.); Câmara & Rafael, 2011: 37 (cit.).

Diagnosis. Yellow species; anterior cercus of the male terminalia with proclinate dorsal projection in lateral view (Figs 102, 103) and with descendant plate subrectangular in posterior view (Fig. 105); phallus subcylindrical with dorsal, subapical, narrow appendix, best visualized in lateral view (Fig. 107), and spiniform projections, more conspicuous in ventral view (Fig. 108); genital fork with arms fused at apex (Fig. 112); tergite 10 undivided (Fig. 111).

R e-description. Male (Fig. 100). Head: Face parallel-sided, brown with gray pruinescence in ventral view, about 5X longer than lower width. Ocellar tubercle with brown pruinescence; ocelli brown. Scape and pedicel yellow with black bristles; postpedicel light brown, about 1.5X longer than pedicel; stylus about 2X longer than postpedicel. Proboscis yellow shorter than head height. Thorax yellow (Fig. 100), shiny, with pleural sutures slightly darker. Legs yellow except hind tibia and femur with apical brown ring and all tarsomeres 4–5 black. Wing (Fig. 101) hyaline;pterostigma brown, conspicuous, about 2X longer than wide. Halter yellow. Abdomen yellow, shiny (Figs 100, 102); tergite 8 divided in two subrectangular plates; sternite 8 divided in two trapezoidal plates. Terminalia: Anterior cercus with proclinate dorsal projection in lateral view (Figs 102, 103) and with concave posterior margin in dorsal view (Fig. 104); descendant plate subrectangular, with lower margin slightly concave in posterior view (Fig. 105). Posterior cercus with rounded apex in lateral view, with dorsal projections, one pointed subbasally and other submedian and subtriangular in dorsal view (Fig. 104). Hypoproct rounded in lateral view (Fig. 103) and comma-shaped in posterior view (Fig. 105). Epandrial ventral lobe bilobed at apex, with spiniform bristles on dorsal lobe (Fig. 103) and longer bristles at apex of the ventral lobe (Fig. 103). Hypandrium wider than long, with V-shaped apex (Fig. 108) without long bristles. Phallus subcylindrical, longer than the hypandrium (Figs 107, 108), with dorsal subapical narrow appendix, best visualized in lateral view (Fig. 107) and spiniform projections, more conspicuous in ventral view (Fig. 108). Subepandrial sclerite wider than long and U-shaped (Fig. 106). Bacilliform sclerite folded and longer than subepandrial sclerite (Fig. 106). Specimen length: 3.1 mm; wing length: 3.2 mm. Female (Fig. 109): similar to male, except by brown frons wider than face. Face brown, about 4X longer than lower width. Terminalia: Tergite 8 subrectangular (Figs 110, 111). Sternite 8 with wider and concave base and rounded apex (Fig. 111). Genital fork with base longer than wide (Fig. 112); arms fused at apex. Tergite 10 undivided, less than half the length of tergite 8 (Fig. 111). Sternite 10 with straight base and slightly bilobed apex (Fig. 111). Receptacle of spermatheca spherical (Figs 110, 113). Specimen length: 2.9 mm; wing length: 3.0 mm.

Geographical distribution. Brazil (Mato Grosso) (Fig. 211).

Type material. HOLOTYPE ♂, labelled: Brasil, Mato Grosso, Base Camp. 12°50’S 51°45’W. 10–27.iii.1968. B. E. Freeman (BMNH). Paratypes: Brazil, Mato Grosso. Idem / dry Forest (1 ♂, BMNH). Idem / gallery forest (1 ♀, BMNH).

Holotype condition. Ocellar bristles, postpedicel and right style lost; left midleg and right hindleg lost; acrostichal, dorsocentral, supra-alar, notopleural, scutellar and post-alar bristles lost, right wing on microslide; abdomen in microtube with glycerin.

Remarks. Opeatocerata lopesi is similar to O. nhamunda sp. nov. by the anterior cercus with subrectangular descendant plate (Figs 105, 142), posterior cercus with rounded apex (Figs 103, 140) and dorsal subbasal pointed projection (Figs 104, 141) and epandrial lobe with bilobed apex (Figs 103, 140). Differs from the latter by the posterior cercus with submedian subtriangular projection (Fig. 104), phallus with dorsal, suapical, narrow appendix (Fig. 107) and spiniform projection, conspicuous ventrally (Fig. 108) and hypandrium V-shaped at apex (Fig.108). In O. nhamunda sp. nov. the posterior cercus doesn’t have a submedian projection (Fig. 141), phallus doesn’t have a dorsal appendix and neither a spiniform projection (Fig. 144), and the hypandrium has a rounded apex.