Opeatocerata cooperi Smith

Câmara, J. T. & Rafael, J. A., 2014, Revision of Opeatocerata Melander, 1928 (Diptera: Empididae: Empidinae), Zootaxa 3846 (4), pp. 502-546 : 514-517

Opeatocerata cooperi Smith

( Figs 58–63 )

Opeatocerata cooperi Smith, 1989: 515 ; Yang et al., 2007: 146 (cat.); Câmara & Rafael, 2011: 37 (cit.).

Diagnosis. Dark yellow species abdominal tergites 3–6 with paramedian subtriangular, brown spots ( Fig. 60 ); sternite 8 wider and V-shaped at base, rounded and narrower at apex ( Fig. 61 ); genital fork with anterior constriction and arms separated at apex ( Fig. 62 ); tergite 10 divided into two subtriangular plates ( Fig. 61 ).

Re-description. Female ( Fig. 58 ). Head: Frons dark brown, shiny, as wide as superior margin of the face. Face dark brown, shiny, slightly convergent toward the proboscis, about 3X longer than lower width. Ocellar tubercle dark brown with brown pruinescence; ocelli brown. Scape and pedicel brown with black bristles. Proboscis yellow longer than head height. Thorax dark yellow, shiny ( Fig. 58 ). Legs yellow, except for hind femur and tibial with apical black ring and all tarsomeres 4–5 black. Hind tibia and tarsus with anterodorsal and posterodorsal row of long bristles. Wing ( Fig. 59 ) hyaline, pterostigma brown, conspicuous, about 2.3X longer than wide. Halter yellow. Abdomen dark yellow; tergites 3–6 with paramedian subtriangular, brown spots ( Fig. 60 ). Terminalia: Tergite 8 subretangular ( Fig. 61 ). Sternite 8 wider and V-shaped at base, rounded and narrower at apex ( Fig. 61 ). Genital fork ( Fig. 62 ) with anterior constriction and arms separated at apex. Tergite 10 divided into two subtriangular plates, with approximately half the length of tergite 8 ( Fig. 61 ). Sternite 10 with straight base and convex apex ( Fig. 61 ). Receptacle of spermatheca spherical ( Fig. 63 ). Specimen length: 3.0 mm; wing length: 3.5 mm. Male. Unknown.

Geographical distribution. Ecuador ( Fig. 211 ).

Type material. HOLOTYPE ♀, labelled: Ecuador, Morona-Santiago, Cord[illera] of Cutucu, 6 km east of Macas, 1100 m. 8.v.1981. M. Cooper ( BMNH). Paratypes: Ecuador. Same data as holotype, 15.vi.1981 (1 ♀, BMNH); Napo Mayuna 5 km W of Tena, 550 m, M. Cooper / 25.viii.1979 (1 ♀, BMNH).

Holotype condition. Ocellar bristles, styles and first flagellomere lost; left wing on microslide; abdomen in microtube with glycerin.

Remarks. Opeatocerata cooperi has sternite 8 wider and V-shaped at base and rounded at apex, similar to O. melanderi . Differs from the latter by tergites with paramedian subtriangular, brown spots ( Fig. 60 ), tergite 10 divided into two subtriangular plates ( Fig. 61 ) and genital fork with arms longer than length of the base ( Figs 61, 62 ). Opeatocerata melanderi has spots on the lateral margins of the tergites, an undivided tergite 10 ( Fig. 128 ) and genital fork with arms shorter than the length of the base.

Figures

FIGURE 211. Geographic distribution of species of Opeatocerata.

FIGURES 58 – 63. Opeatocerata cooperi Smith, holotype ♀. 58. habitus, lateral view; 59. wing; 60. tergites 5 – 10, dorsal view; 61. terminalia, tergites 8, 10 and cerci, dorsal view; sternites 8 and 10, ventral view; 62. genital fork; 63. receptacle of spermatheca.

FIGURES 123 – 128. Opeatocerata melanderi Câmara & Rafael, 2011, paratype ♂ (123 - 127) and paratype ♀ (128). 123. abdomen from tergite 3 to terminalia, lateral view; 124. terminalia, lateral view; 125. lobes of cerci, dorsal view; 126. ejaculatory apodeme, phallus and hypandrium, lateral view; 127. hypandrium, ventral view; 128. tergites 8 and 10, dorsal view and sternites 8 and 10, ventral view.