Revision of Opeatocerata Melander, 1928 (Diptera: Empididae: Empidinae) Author Câmara, J. T. Author Rafael, J. A. text Zootaxa 2014 3846 4 502 546 journal article 10.11646/zootaxa.3846.4.2 ea136b1c-dc96-4c41-b078-01ca553453a0 1175-5326 252519 71A80CC3-CDC1-4291-863B-FA7501D60AF5 Opeatocerata smithi sp. nov. ( Figs 152–160 ) Diagnosis. Anterior cercus with a proclinate dorsal projection in lateral view ( Figs 154, 155 ), anterior margin rounded in dorsal view ( Fig. 156 ); epandrium lobe truncate at apex ( Fig. 155 ); phallus subcylindrical, wider medially, with dorsal subapical narrow appendix ( Fig. 159 ). Description . Male ( Fig. 152 ). Head : Face slightly divergent toward the proboscis, dark brown, with gray pruinescence visible in ventral view, about 4X longer than lower width. Ocellar tubercle protuberant, brown with gray pruinescence; ocelli light brown. Antenna light brown with black bristles; postpedicel about 1.5X longer than pedicel; stylus about 2.5X longer than postpedicel. Proboscis yellow shorter than head height. Thorax yellow, shiny ( Fig. 152 ). Legs yellow, except for hind femur and tibia with brown apical ring and all tarsomeres 4–5 black; hind tibia with anterodorsal, posterodorsal and posteroventral rows of longer bristles; hind tarsus with anterodorsal and posterodorsal rows of longer bristles. Wing ( Fig. 153 ) hyaline, pterostigma, brown, conspicuous, about 2.4X longer than wide. Halter light yellow. Abdomen yellow, shiny ( Fig. 152 ); tergite 8 divided in two subtriangular plates; sternite 8 divided in two trapezoidal plates. Terminalia : Anterior cercus with a proclinate dorsal projection in lateral view ( Figs 154, 155 ), anterior margin rounded in dorsal view ( Fig. 156 ); descendant plate subrectangular with lower margin slightly bilobate in posterior view ( Fig. 157 ). Posterior cercus with acuminate apex in lateral view ( Figs 154, 155 ); without dorsal projections ( Fig. 156 ). Hypoproct subtriangular in lateral lateral view ( Fig. 155 ) and comma-shaped in posterior view ( Fig. 157 ). Epandrial ventral lobe truncate at apex, spiniform bristles mesially and longer bristles apically ( Fig. 155 ). Hypandrium longer than wide, with rounded apex and median sinus ( Fig. 160 ), without long bristles. Phallus subcylindrical, wider medially, longer than hypandrium, with dorsal subapical narrow appendix ( Fig. 159 ). Subepandrial sclerite wider than long, U-shaped ( Fig. 158 ). Bacilliform sclerite folded and longer than subepandrial sclerite ( Fig. 158 ). Specimen length : 2.9 m ; wing length : 3.5 mm . Female . Unknown. FIGURES 152–160 . Opeatocerata smithi sp. nov. , holotype ♂. 152 . habitus , lateral view; 153 . wing; 154 . abdomen from tergite 6 to terminalia, lateral view; 155 . terminalia, lateral view; 156 . lobes of cerci, dorsal view; 157 . descendant plate of anterior cercus and hypoproct, posterior view; 158 . subepandrial sclerite and bacilliform sclerite, dorsal view; 159 . ejaculatory apodeme, phallus and hypandrium, lateral view; 160 . hypandrium, ventral view. Geographical distribution . Brazil (Amazonas) ( Fig. 211 ). Type material . HOLOTYPE ♂, labelled: Brasil , AM[azonas] , Maués, Rio Abacaxis, Campina Pacamiri, 04º35’49’’S / 58º13’14’’W , 30–31.v.2008 . Malaise na mata. J. A. Rafael e equipe ( INPA ). Holotype condition . Postallar, scutellars and acrostichals bristles lost; left wing mounted on microslide; abdomen in microtube with glycerin. Etymology . The specific name is in tribute to K.G.V. Smith due to his contribution to the knowledge on the Neotropical fauna of Empididae , particularly the Brazilian fauna. Remarks . Opeatocerata smithi sp. nov. has an anterior cercus with proclinate dorsal projection ( Fig. 155 ), descendant plate subrectangular in posterior view ( Fig. 157 ), subepandrial sclerite U-shaped ( Fig. 158 ) and phallus with dorsal subapical narrow appendix ( Fig. 159 ), all characters similar to O. spinipenis sp. nov. . Differs from the latter by the hypoproct subtriangular in lateral view ( Fig. 155 ), epandrial lobe with truncate apex ( Fig. 155 ) and phallus without lateral spines ( Fig. 160 ). Opeatocerata spinipenis sp. nov. has hypoproct bacilliform in lateral lateral view ( Fig. 163 ), epandrial lobe with rounded apex ( Fig. 163 ) and phallus with lateral subapical spines ( Fig. 168 ).