Brachygasterina muisca Soares & Carvalho, 2007

Pérez, Sandra, Wolff, Marta & De, Claudio J. B., 2012, A new species of Brachygasterina Macquart from Colombia, and description of the males of B. stuebeli Röder and B. muisca Soares & Carvalho (Diptera: Muscidae), Zootaxa 3554, pp. 45-57 : 54

Brachygasterina muisca Soares & Carvalho, 2007

( Figs. 20–24 )

Diagnosis. This species can be easily distinguished from the remaining species of Brachygasterina by eye with long sparse hairs, the facial ridge with setulae on the basal half and with vein M1+2 slightly curved to R4+5; female lacking interfrontal seta.

General color. Body metallic blue. Palpus and antenna dark-brown. Fronto-orbital plate, face, parafacial and gena dark-brown, gena with a metallic blue shining on lower portion. Lunule reddish-brown. Scutum with 4 dark slightly shining dorsal stripes with silver pruinosity; scutellum metallic blue; anepisternum and katepisternum dark-brown with metallic blue shine; anepimeron, meron, katatergite and anatergite dark-brown. Calypters brownish with margins dark-brown, halters dark-brown. Wing brownish with brown veins. Legs dark-brown with bluish shine on femur, claws black and pulvillus yellowish. Abdomen metallic green.

Description. Male. Head. Eye long and sparsely ciliate, holoptic; frons narrow, about 0.2 of the head width at the anterior ocellus. Anterointernal ommatidia not enlarged. Antenna long, postpedicel 1.28 times pedicel height, postpedicel slightly dilated; antennal insertion above the mid level of eyes, 0.6 of the height of the face. Arista almost bare. Inner vertical setae shorter tan outer vertical setae, inner vertical convergent, outer vertical divergent. 8–9 pairs of frontal setae. Facial-ridge ciliated on the basal-half. Parafacial wide at pedicel level, 0.43 of the width of the gena below the eye. Palpus spatulated.

Thorax. Dorsocentral setae 2:4; acrostichal setae 2:3, anterior pair weak; 4 humeral; 1 posthumeral; 1 presutural; 2 intra-alar setae, strong and long; 1 prealar setae stronger than notopleural anterior setae; 2 supra-alar setae, posterior half of the anterior length; 2 postsupra-alar setae; 2 notopleural setae, notopleuron with few sparse setulae around the posterior seta. Scutellum with a pair of weak basal setae, 2 pairs of strong subapical setae; 1 pair of strong apical; 2 pairs of discal setae; scutellum with coverage long setulae. 2–3 proepisternal setae; 3-4 proepimeral setae. Proepisternum and proepimeron with many long setulae associated with setae. Anepisternum with a row of 9–10 setae on posterior margin and 2 slightly differentiated upward curved setae on the upper anterior portion. Katepisternal 2:3 (1 slender), katepisternum covered by long setulae; anepimeron, katepimeron, meron and metakatepisternum bare; katatergite distinctly setulose. Postalar wall and supra-squamal ridge bare.

Legs. Fore coxa, without differentiated setae. Femur with 1 row of setae on posterodorsal and posteroventral faces. Tibia with 1 short dorsal seta half, 1 dorsal preapical seta and 1 posteroventral preapical seta. First tarsomere with basal setulae on ventral surface. Claws and pulvillus developed. Hind femur with 1 row of setae on dorsal surface, anteroventral surface with 1 row of 9 strong and long setae; posteroventral with 1 row of setae; 2 posterodorsal preapical setae. Hind tibia with 1 strong median seta, 1 apical seta and 1 preapical seta on the anterodorsal surface; 3 anteroventral setae; 1 apical anteroventral seta and 1 strong posterodorsal seta (“calcar”).

Wing. Brownish, veins dark-brown, bare except for costa. R4+5 bare on both surfaces. M1+2 slightly curved towards R4+5. Crossvein dm-cu very sinuous. Calypters brown with lower one slightly longer than upper one.

Abdomen. Sternite 1 bare. Male genitalia: sternite 5 ( Fig. 22 ); cercal plate, surstylus and epandrium ( Fig. 23 ); aedeagus and phallic complex ( Fig. 24 ).

Measurements (n=1): Body length, 8.7 mm. Wing length, 10.3 mm

Examined material. “CO [ Colombia] Cundinamarca/PNN [Parque Nacional Natural] Sumapaz, Bocatoma Cerro el Zapato [site]/ 4°14´N; 74°12´W. 3560 m.s.n.m. [meters above sea level]/Malaise [trap]/Feb [February] 1- 16 de 2003/ 3716 [code]”, (IAvH: 1 male) [specimen lacking mid legs]

Geographic distribution. Colombia.

Comments. The male specimen examined came from the western side of the Cordillera Oriental. The type locality of B. muisca (Cundinamarca, 4o31’N; 73o 45’W, 2990 meters above sea level) is located on the eastern side of the Cordillera Oriental, in Chingaza National Park.

Figures

FIGURES 20 – 24. Male of Brachygasterina muisca Soares & Carvalho: 20, head, frontal view; 21, head, lateral view; 22, sternite 5; 23, epandrium, cercal plate and surstyli, in posterior view; 24, aedeagus and phallic complex, in lateral view.