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 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.

Figures

FIGURE 211. Geographic distribution of species of Opeatocerata.

FIGURES 100 – 108. Opeatocerata lopesi Smith, 1989, holotype ♂. 100. habitus, lateral view; 101. wing; 102. abdomen and terminalia, lateral view; 103. terminalia, lateral view; 104. lobes of cerci, dorsal view; 105. descendant plate of anterior cercus, posterior view; 106. subepandrial sclerite and bacilliform sclerite, dorsal view; 107. ejaculatory apodeme, phallus and hypandrium, lateral view; 108. phallus, hypandrium, ventral view.

FIGURES 109 – 113. Opeatocerata lopesi Smith, paratype ♀. 109. habitus, lateral view; 110. abdomen from tergite 6 to terminalia, lateral view; 111. terminalia, tergites 8 and 10, dorsal view; sternites 8 and 10, ventral view; 112. genital fork. 113. receptacle of spermatheca.

FIGURES 138 – 144. Opeatocerata nhamunda sp. nov., holotype ♂. 138. habitus, lateral view; 139. wing; 140. terminalia, lateral view; 141. lobes of cerci, dorsal view; 142. descendant plate of anterior cercus and hypoproct, posterior view; 143. subepandrial sclerite and bacilliform sclerite, dorsal view; 144. ejaculatory apodeme, phallus and hypandrium, lateral view.