Opeatocerata stubbsi Smith, 1989

Câmara, J. T. & Rafael, J. A., 2014, Revision of Opeatocerata Melander, 1928 (Diptera: Empididae: Empidinae), Zootaxa 3846 (4), pp. 502-546 : 537

publication ID	https://doi.org/ 10.11646/zootaxa.3846.4.2
publication LSID	lsid:zoobank.org:pub:71A80CC3-CDC1-4291-863B-FA7501D60AF5
DOI	https://doi.org/10.5281/zenodo.5285293
persistent identifier	https://treatment.plazi.org/id/03F6943F-E056-FFB9-C7C7-FEABAD12116B
treatment provided by	Plazi
scientific name	Opeatocerata stubbsi Smith, 1989
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Opeatocerata stubbsi Smith, 1989 View in CoL

( Figs 170–184 View FIGURES 170 – 178 View FIGURES 179 – 184 )

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

Diagnosis. Dark yellow species; tergites 3–6 with paramedian subrectangular black spots ( Figs 170, 173 View FIGURES 170 – 178 ); anterior cercus of male terminalia with descendant plate slightly protruding laterally in posterior view ( Fig. 176 View FIGURES 170 – 178 ); phallus narrow at base, wide medially and narrow apically, short, not extending beyond apex of the hypandrium ( Fig. 178 View FIGURES 170 – 178 ); genital fork wider at base; arms as long as base and separated at apex ( Fig. 183 View FIGURES 179 – 184 ); tergite 10 undivided ( Fig. 182 View FIGURES 179 – 184 )

Re-description. Male ( Fig. 170 View FIGURES 170 – 178 ). Head: Face slightly divergent toward the proboscis, dark brown to black, about 4X longer than lower width. Ocellar tubercle dark brown to black with brown pruinescence; ocelli light brown. Antennae pale yellow with black bristles; postpedicel about 2X longer than pedicel; stylus about 2.5X longer than postpedicel. Proboscis yellow shorter than head height. Thorax dark yellow, shiny ( Fig. 170 View FIGURES 170 – 178 ). Legs yellow except hind tibia with brown apical ring and all tarsomeres 4–5 lack, mid, hind tibia and hind tarsi with anterodorsal and posterodorsal rows of longer bristles. Wing ( Fig. 171 View FIGURES 170 – 178 ) hyaline; pterostigma brown, conspicuous; pterostigma about 2.5X longer than wide. Halter yellow. Abdomen yellow, shiny; tergites 3–6 with paramedian subrectangular black spots ( Figs 170, 173 View FIGURES 170 – 178 ); 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 172, 174 View FIGURES 170 – 178 ); with median protuberance on posterior margin in dorsal view ( Fig. 175 View FIGURES 170 – 178 ); descendant plate slightly protruding laterally in posterior view ( Fig. 176 View FIGURES 170 – 178 ). Posterior cercus with rounded apex in lateral view ( Fig. 174 View FIGURES 170 – 178 ) with dorsal projections, one pointed subbasal and other subapical subtriagular in dorsal view ( Fig. 175 View FIGURES 170 – 178 ). Hypoproct rounded in lateral view ( Fig. 174 View FIGURES 170 – 178 ) and comma-shaped in posterior view. Epandrial ventral lobe rounded at apex; spiniform bristles mesially and longer bristles distally ( Fig. 174 View FIGURES 170 – 178 ). Hypandrium longer than wide ( Fig. 178 View FIGURES 170 – 178 ), with rounded apex, without long bristles. Phallus narrow at base, wide medially and narrow apically ( Fig. 178 View FIGURES 170 – 178 ), short, not extending beyond apex of the hypandrium. Subepandrial sclerite wider than long, U-shaped ( Fig. 177 View FIGURES 170 – 178 ). Bacilliform sclerite folded and longer than subepandrial sclerite ( Fig. 177 View FIGURES 170 – 178 ). Specimen length: 3.0 mm ( Smith 1989); wing length: 3.2 mm. Female ( Fig. 179 View FIGURES 179 – 184 ). similar to male, except frons dark brown to black, shiny, wider than the face. Face about 3X longer than wide. Stylus brown. Wing ( Fig. 180 View FIGURES 179 – 184 ) more infuscated at apex. Terminalia: Tergite 8 subrectangular ( Fig. 182 View FIGURES 179 – 184 ), base wider and concave, and apex slightly convex ( Fig. 182 View FIGURES 179 – 184 ). Genital fork wider at base, arms as long as base and separated at apex ( Fig. 183 View FIGURES 179 – 184 ). Tergite 10 undivided, about half the length of tergite 8 ( Figs 181, 182 View FIGURES 179 – 184 ). Sternite 10 with straight base and slightly bilobed apex ( Fig. 182 View FIGURES 179 – 184 ). Receptacle of spermatheca hemispheric ( Fig. 184 View FIGURES 179 – 184 ). Specimen length: 3.0 mm; wing length: 3.4 mm.

Geographical distribution. Trinidad and Brazil (Amazonas) new record.

Type material. HOLOTYPE ♂, labelled: Trinidad, S[aint] George, Aripo Valley. 500’[ft]. 29.i.1976. A. E. Stubbs ( BMNH). Paratypes: Trinidad. S[aint] Andrew, Plum, 300’[ft], 28.i.1976, A.E. Stubbs (1 ♀, BMNH). S[aint] George, Areno Reserve, 2.ii.1976, A.E. Stubbs (1 ♀, BHNM).

Additional material. Brazil, Amazonas. Barcelos, Rio Padauari, Com. Ararinha, 00º30’18’’N 64º03’30’’W, 5–8.vi.2010, Malaise, R. Machado, P. Dias, J. A. Rafael (1 ♂, 3 ♀, INPA). 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 (3 ♂, 7 ♀, MZUSP). Barcelos, 00º28’36’’N 63º28’18’’W, Malaise em campina, vi–vii.2007, A.S. Filho & T. Krolow (3 ♂, INPA). Barcelos, Rio Aracá, Com. Bacuquara, 00º09’17.5’’N 63º10’35.2’’W, 12–14.vi.2010, Varredura, S.S. Oliveira, J.T. Câmara, J.A. Rafael, V. Linard (2 ♂, 3 ♀, MPEG). Querari (Pelotão), 01º05’N 69º51’W, 6.iv.–15.v.1993, J. Vidal (4 ♂, INPA). Reserva Campina, 02º35.3’S 60º02’W, 80 m, 8.v.2010, D. & W.N. Mathis (1 ♂, INPA). Manaus, C. Univ., ii.1979, J.A. Rafael, Armadilha de Malaise (2 ♂, INPA).

Holotype condition. Right wing on microslide and abdomen in microtube with glycerin.

Variation. Body ranging from 2.5 mm to 3.4 mm.

Remarks. Opeatocerata stubbsi is similar to O. hadrophallus sp. nov. by the short phallus, not extending beyond the hypandrium apex ( Figs 98 View FIGURES 90 – 99 , 178 View FIGURES 170 – 178 ) and posterior cercus with pointed dorsal projection in dorsal view ( Figs 85 View FIGURES 80 – 89 , 175 View FIGURES 170 – 178 ). Differs from the latter by tergites with paramedian subrectangular spots ( Fig. 173 View FIGURES 170 – 178 ), posterior cercus with dorsal subapical subtriangular projection in dorsal view ( Fig. 175 View FIGURES 170 – 178 ) and hypoproct rounded in lateral view ( Fig. 174 View FIGURES 170 – 178 ). Opeatocerata hadrophallus sp. nov. has tergites with paramedian subtriagular spots ( Fig. 93 View FIGURES 90 – 99 ), posterior cercus without dorsal subapical projection ( Fig. 95 View FIGURES 90 – 99 ) and hypoproct subtriangular in lateral view ( Fig. 94 View FIGURES 90 – 99 ).