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 3 X 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 2.3 X 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.