Opeatocerata lopesi Smith

Câmara, J. T. & Rafael, J. A., 2014, Revision of Opeatocerata Melander, 1928 (Diptera: Empididae: Empidinae), Zootaxa 3846 (4), pp. 502-546 : 523

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 5 X longer than lower width. Ocellar tubercle with brown pruinescence; ocelli brown. Scape and pedicel yellow with black bristles; postpedicel light brown, about 1.5 X longer than pedicel; stylus about 2 X 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 2 X 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 4 X 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.