Ommatius trifidus Vieira, Bravo & Rafael, sp. nov.
Creators: name: Vieira, Rodrigo
name: Bravo, Freddy
name: Rafael, José Albertino
Publisher: name: Zenodo
Year: 2010
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Diptera
Asilidae
Ommatius
Ommatius trifidus

description: Ommatius trifidus Vieira, Bravo & Rafael sp. nov.
(Figs. 41–47)
Male. Head. Antenna brown; 2 ocellar setae; vertex black, golden tomentose; face golden tomentose; face with 10 brown mystacal macrosetae; frons brown; palpus brownish setose; proboscis dark brown with white and yellowish setae ventrally; labial setae yellow-brown; occiput black-gray tomentose; occipital setae whitish and yellowish; 5 postocular macrosetae.
Thorax. Mesonotum black; one portion of the scutellum golden-grayish tomentose; sutural spot, prescutellar spot and postalar spot golden-grayish; pleuron black, gray tomentose. Macrosetae/setae thorax: antepronotum with 4 yellow macrosetae; 2 notopleural macrosetae; 2 supralar macrosetae (1 thick and long, the other thinner and 2/3 as long as first); 2 postalar macrosetae (1 thin and 1/2 as long as other); 6 pairs of long dorsocentral macrosetae; discal scutellar setae yellowish; 2 black apical scutellar macrosetae; metanepisternal and katatergal macrosetae yellowish.
Wing. Wing without costal dilation; crossvein r-m at middle of cell d; R4+5 at apex of cell d. Halter yellow.
Legs. Hind femur swollen; fore and middle femora brown anteriorly and yellowish posteriorly and ventrally; hind femur with basal 1/2 yellow to yellow-brown and apical 1/2 brown; fore tibia yellowish; middle tibia mostly yellowish with narrow apex brown; hind tibia with basal 1/2 yellowish and apical 1/2 brownish; fore and middle tarsi with basal 2/3 of first tarsomere yellowish, apical 1/3 brownish; hind tarsus with first tarsomere brownish. Macrosetae/setae legs: hind trochanter yellow setose; fore femur yellow setose ventrally; middle femur with preapical posterodorsal seta brown and only yellow setae ventrally; hind femur with 2 anterior macrosetae and 1 anterodorsal black, 7–8 macrosetae anteroventrally, 1 basal and 1 apical macroseta posteroventrally; hind tibia with apical spur-like macroseta; right fore tarsus with 1 yellow macroseta.
Abdomen. Tergites and sternites dark brown.
Terminalia (Figs. 41–47). Yellow-brown to brownish. Cercus truncate (Fig. 42); epandrium with 3 teeth in ventral view (Fig. 43); hypandrium with triangular posterior margin (Fig. 43); median portion of gonocoxite with macrosetae (Fig. 43); medioapical portion of subepandrial sclerite with setae (Fig. 44); ejaculatory apodeme with basal 1/3 moderately wide and apical 2/3 narrow in lateral view (Fig. 45); phallus with anterodorsal portion slightly sclerotized (Figs. 45, 47). Ventral margin of phallus with 1 pointed projection basally, 1 median rounded projection, and preapical projection curved back in lateral view (Fig. 45). Phallus 3.7 times longer than greatest width of ejaculatory apodeme in lateral view (Fig. 45); basal portion of gonostylus truncate, apex prominent (Fig. 46). Gonostylus 3.1 times longer than its greatest width in lateral view (Fig. 46).
Size. Body length 11.4 mm; wing length 8.5 mm.
Holotype condition. Right apical scutellar macroseta lost; 1 right dorsocentral macroseta and right middle leg lost.
Female. Unknown.
Variation. The following variation was observed in the paratype specimens: 7–8 brown mystacal macrosetae; 6 postocular macrosetae; postalar spot golden; 1–3 supralar macrosetae; pleura brown-reddish sparsely gray tomentose; crossvein r-m slightly beyond the middle of cell d; stem of halter yellow to brown; ventral portion of middle femur with 1 black seta ventrally; hind femur posteroventrally with 2 apical macrosetae; first tarsomere on middle tarsus brown, black on hind tarsus; body length 10.3–13.2 mm, wing 8– 8.9 mm.
Etymology. The name trifidus refers to the apex of epandrium.
Geographical records. Brazil: Pará State and Bahia State.
Type material examined. Holotype: Pará, Bujaru, 12.v.1978 / BRASIL, Pará, I.S. Gorayeb [Collector] / Holótipo Ommatius trifidus Vieira, Bravo & Rafael (3 MPEG).
Paratypes: BRASIL, Pará, Belém, MPEG-CAMPUS, 21.vi.1993, L. Costa [Collector] (1 3 MPEG); BRASIL, Pará, Tucuruí, Rio Tocantins, Marg.[em] Direita Canoal, 26–28.iii.1984 / Armadilha Suspensa / Brasil, Pará, T. Pimentel (1 3 MPEG); Bôa {Boa}, Vista, Mu.[nicípio] Castanhal, 3.iii.1964 / BRASIL, PA[rá], W. França Col. (1 3 MZUSP); [Rodovia] Belém-Brasília, Km 90, F.S. Antonio, 30.vii.1972 / BRASIL, PA[rá], M. Helana Col. (1 3 MZUSP); BRASIL, Bahia, Seabra, 11–13.i.2008. Leg Alvim, E. / Armadilha Luminosa / MZUEFS# 38363 (1 3 MZUEFS); BRASIL, [Bahia], Barreiras, APA Rio de Janeiro, 05.iv.2008, Bravo, F., Menezes, E., Alvim, E., Silva-Neto, A. [Collectors] / MZUEFS #39217 (1 3 MZUEFS).
description: Published as part of Vieira, Rodrigo, Bravo, Freddy & Rafael, José Albertino, 2010, Ommatius Wiedemann, 1821, normus species-group (Diptera, Asilidae): description of two new species and comments on Brazilian species, pp. 39-51 in Zootaxa 2344 on pages 47-49, DOI: 10.5281/zenodo.193351