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

Opeatocerata stubbsi Smith, 1989

( Figs 170–184)

Opeatocerata stubbsi Smith, 1989: 514 ; 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); anterior cercus of male terminalia with descendant plate slightly protruding laterally in posterior view ( Fig. 176); phallus narrow at base, wide medially and narrow apically, short, not extending beyond apex of the hypandrium ( Fig. 178); genital fork wider at base; arms as long as base and separated at apex ( Fig. 183); tergite 10 undivided ( Fig. 182)

Re-description. Male ( Fig. 170). Head: Face slightly divergent toward the proboscis, dark brown to black, about 4 X longer than lower width. Ocellar tubercle dark brown to black with brown pruinescence; ocelli light brown. Antennae pale yellow with black bristles; postpedicel about 2 X longer than pedicel; stylus about 2.5 X longer than postpedicel. Proboscis yellow shorter than head height. Thorax dark yellow, shiny ( Fig. 170). 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) hyaline; pterostigma brown, conspicuous; pterostigma about 2.5 X longer than wide. Halter yellow. Abdomen yellow, shiny; tergites 3–6 with paramedian subrectangular black spots ( Figs 170, 173); 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); with median protuberance on posterior margin in dorsal view ( Fig. 175); descendant plate slightly protruding laterally in posterior view ( Fig. 176). Posterior cercus with rounded apex in lateral view ( Fig. 174) with dorsal projections, one pointed subbasal and other subapical subtriagular in dorsal view ( Fig. 175). Hypoproct rounded in lateral view ( Fig. 174) and comma-shaped in posterior view. Epandrial ventral lobe rounded at apex; spiniform bristles mesially and longer bristles distally ( Fig. 174). Hypandrium longer than wide ( Fig. 178), with rounded apex, without long bristles. Phallus narrow at base, wide medially and narrow apically ( Fig. 178), short, not extending beyond apex of the hypandrium. Subepandrial sclerite wider than long, U-shaped ( Fig. 177). Bacilliform sclerite folded and longer than subepandrial sclerite ( Fig. 177). Specimen length: 3.0 mm ( Smith 1989); wing length: 3.2 mm. Female ( Fig. 179). similar to male, except frons dark brown to black, shiny, wider than the face. Face about 3 X longer than wide. Stylus brown. Wing ( Fig. 180) more infuscated at apex. Terminalia: Tergite 8 subrectangular ( Fig. 182), base wider and concave, and apex slightly convex ( Fig. 182). Genital fork wider at base, arms as long as base and separated at apex ( Fig. 183). Tergite 10 undivided, about half the length of tergite 8 ( Figs 181, 182). Sternite 10 with straight base and slightly bilobed apex ( Fig. 182). Receptacle of spermatheca hemispheric ( Fig. 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, 00º 30 ’ 18 ’’N 64 º03’ 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; 63 º 17 ’ 22.3 ’’W, 15–19.vi. 2010, Varredura, S.S. Oliveira, J.T. Câmara, V. Linard, J.A. Rafael (3 ♂, 7 ♀, MZUSP). Barcelos, 00º 28 ’ 36 ’’N 63 º 28 ’ 18 ’’W, Malaise em campina, vi–vii. 2007, A.S. Filho & T. Krolow (3 ♂, INPA). Barcelos, Rio Aracá, Com. Bacuquara, 00º09’ 17.5 ’’N 63 º 10 ’ 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 69 º 51 ’W, 6.iv.– 15.v. 1993, J. Vidal (4 ♂, INPA). Reserva Campina, 02º 35.3 ’S 60 º02’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, 178) and posterior cercus with pointed dorsal projection in dorsal view ( Figs 85, 175). Differs from the latter by tergites with paramedian subrectangular spots ( Fig. 173), posterior cercus with dorsal subapical subtriangular projection in dorsal view ( Fig. 175) and hypoproct rounded in lateral view ( Fig. 174). Opeatocerata hadrophallus sp. nov. has tergites with paramedian subtriagular spots ( Fig. 93), posterior cercus without dorsal subapical projection ( Fig. 95) and hypoproct subtriangular in lateral view ( Fig. 94).