Opeatocerata brasiliensis, Câmara, J. T. & Rafael, J. A., 2014

Câmara, J. T. & Rafael, J. A., 2014, Revision of Opeatocerata Melander, 1928 (Diptera: Empididae: Empidinae), Zootaxa 3846 (4), pp. 502-546 : 512-514

Opeatocerata brasiliensis sp. nov

( Figs 33–46)

Diagnosis. Yellow species; descendant plate of the anterior cercus subtriangular in posterior view ( Fig. 38); phallus narrow, widening toward the apex, with large dorsal subapical appendix ( Fig. 40); bacilliform sclerite folded and shorter than subepandrial sclerite ( Fig. 39); genital fork with arms longer than base ( Figs 44, 46); tergite 10 undivided ( Fig. 45).

Description. Male ( Fig. 33). Head: Face parallel-sided, brown with gray pruinescence visible in ventral view, about 4 X longer than lower width. Ocellar tubercle protuberant, brown with brown pruinescence; ocelli yellow. Antenna yellow with black bristles; postpedicel about 1.5 X longer than pedicel; stylus about 2.5 X longer than postpedicel. Proboscis yellow shorter than head height. Thorax yellow, shiny ( Fig. 33). Legs yellow, except for hind femur and tibia with apical black ring and all tarsomeres 4–5 black; hind tibia with anterodorsal and posterodorsal and anteroventral rows of longer bristles. Wing ( Fig. 34) hyaline; pterostigma brown, conspicuous, about 2.8 X longer than wide. Halter yellow. Abdomen yellow, shiny ( Figs 33, 35); tergite 8 divided in two subrectangular plates; sternite 8 divided in two trapezoidal plates. Terminalia: Anterior cercus with proclinate dorsal projection in lateral view ( Fig. 36), posterior margin with median sinus in dorsal view ( Fig. 37); descendant plate subtriangular in posterior view ( Fig. 38). Posterior cercus with rounded apex in lateral view ( Figs 35, 36), with pointed dorsal subbasal projection in dorsal view ( Fig. 37). Hypoproct subtrapezoidal in lateral view ( Fig. 36) and covering inner surface of the posterior cercus in posterior view ( Fig. 38). Epandrial ventral lobe rounded at apex ( Fig. 36), with spiniform bristles mesially and longer bristles at base ( Fig. 36). Hypandrium longer than wide, with concave apex ( Fig. 41), without long bristles. Phallus narrow, widening toward the apex, longer than hypandrium, with large dorsal subapical appendix ( Fig. 40). Subepandrial sclerite longer than wide, U-shaped ( Fig. 39). Bacilliform sclerite folded and shorter than subepandrial sclerite ( Fig. 39). Specimen length: 3.6 mm; wing length: 3.6 mm. Female ( Fig. 42). Similar to male, except frons brown, shiny, wider than face. Wing with pterostigma about 2.9 X longer than wide ( Fig. 43). Terminalia: Tergite 8 subrectangular ( Fig. 44). Sternite 8 with base wider, concave and apex rounded ( Fig. 44). Genital fork wider than long and arms longer than base, separated at apex ( Figs 44, 46). Tergite 10 undivided, with half the length of tergite 8 ( Fig. 45). Sternite 10 with base straight and apex bilobed ( Fig. 45). Specimen length: 3.3 mm, wing length: 3.3 mm.

Geographical distribution. Brazil (Goiás, Mato Grosso and Pará) ( Fig. 211).

Type material. HOLOTYPE ♂, labelled: Brasil, Mato Grosso, Chapada Guimarães, 22–30.xi. 1983. J.E. Bindá / armadilha malaise ( INPA). Paratypes: Brazil, Mato Grosso. Same data (2 ♂, 4 ♀, INPA). Pará. Marabá, S. Norte. ix. 1982. Michael Miles (1 ♂, MPEG). Est[ado] de Goiás. Corumbá, F[azenda]. Monjolinho. Barreto col. (1 ♂, MZUSP).

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

Etymology. The specific epithet refers to the country “ Brazil ” where the specimens were collected. Remarks. Opeatocerata brasiliensis sp. nov. differs from other species by the descendant plate of anterior cercus subtriangular in posterior view ( Fig. 38) (in other species, the plate is subtrapezoidal, subrectangular, hourglass-shaped or with lateroventral projection), subepandrial sclerite longer than wide, ( Fig. 39) (in other species it is wider than long or as wide as long) and hypoproct subtrapezoidal in lateral view ( Fig. 36) (rounded, bacilliform or subtriangular in other species).