Ctenodontina Enderlein , 1914 ( Diptera , Asilidae , Asilinae ) : First Record for Brazil and Description of a New Species

Ctenodontina Enderlein is characterized by the epandrium narrowed apically (usually terminating in a finger-like lobe) and distinctly shorter than sternite 8 [1, 2]. In the female, the ovipositor with apical ventral comb of spines, and with tergite 8 broadly expanded laterally, densely setose and cupped beneath, completely obscuring sternite 8 in profile [1, 2]. Ctenodontina is a Neotropical genus (Figure 1), comprising 4 species [3]: C. martini. Fisher [4]. This species was described by Fisher in Fisher and Hespenheide, 1992 [1] (Mexico and Guatemala), C. maya Carrera and d’Andretta [5] (Peru), C. mochica Lamas [6] (Peru), and C. pectinatipes Enderlein [7] (Colombia). Furthermore, Artigas and Papavero [8] illustrated a male hind femur of Ctenodontina sp. from Argentina, Jujuy, La Legua (Figure 2(e)), but they did not described the specimen. The same illustrations used by Artigas and Papavero [8] were used by Papavero et al. [9]. In this work a new species for Ctenodontina from Amazonas state, Brazil, is described and illustrated and a key for all species presently in Ctenodontina is provided.

In this work a new species for Ctenodontina from Amazonas state, Brazil, is described and illustrated and a key for all species presently in Ctenodontina is provided.

Material and Methods
This study is based on the examination of specimens housed in the following Brazilian institutions: CZPB-Colec ¸ão Zool ógica Prof. Paulo Bührnheim, Departamento de Biolo-gia, Universidade Federal do Amazonas, Manaus, Brazil, and Instituto Nacional de Pesquisas da Amaz ônia (INPA), Amazonas, Manaus, Brazil.Morphological terminology follows Cumming and Wood [10].Detached wings were mounted on microslides in Canada Balsam.The microslides were glued on the edge of a piece of resistant paper and thereafter, attached at the same pin of the specimen.In this way, the piece is maintained detached next to the specimen.Dissected terminalia were treated in hot (40 • C) 10% KOH for 8 hours, washed in water, posteriorly treated in 10% acetic acid and subsequently examined in excavated slides in glycerin.After examination and illustration, the detached parts were placed in microvials with glycerin and pinned with their respective specimens.
The label data is cited in full, with the original spellings, punctuations, and dates.Information presented within brackets is complementary data not included on the labels.Data for the same specimen but from different labels are separated by slashes (/).The map (Figure 1) was built with DIVA-GIS 7.4.0.
Wing (Figure 3(b)).Brown infuscated, mainly at distal half; no costal dilation; R 4 and R 5 bifurcation placed beyond discal cell apex; crossvein r-m situated beyond middle of discal cell; microtrichia on posterior margin arranged in a single plane; halter pale yellow mixed with black.Legs (Figures 2(f) and 3(a)).Fore and midfemora dorsally and anteriorly black, ventrally and posteroventrally yellowish, except black narrow apex of mid femora posteroventrally; hind femora wholly black, without swelling (Figure 2(f)); fore tibia dorsally, ventrally and posteriorly yellowish, anteriorly with brown longitudinal stripe with brown, short close spaced, spiniform setae and a yellow longitudinal stripe.Mid tibiae dorsally, posteriorly and ventrally yellow, anteriorly with yellow longitudinal stripe and black stripe.Hind tibiae black, except yellow basal half dorsally.Fore and midtarsomeres yellow, except black apex of tarsomeres 1-4 and black apical half of tarsomere 5. Hind tarsomere black mixed with brown.Chaetotaxy: hind trochanter with yellow setae; fore femora with yellow and black setae ventrally; middle femora with 5 black anterior macrosetae, 6 black macrosetae and 1 yellow seta posteriorly, 33 black macrosetae ventrally; hind femora with 3 black macrosetae anterior, 3 black macrosetae anteroventrally; fore tibiae with 5 black setae dorsally, middle tibiae with 2 black macrosetae anteroventrally; hind tibia with 1 black preapical macroseta anteroventrally; all macrosetae and setae of tarsomeres black.
Abdomen (Figure 3 2(e)-2(f)).According to Fisher [4], various authors mentioned a spinous swelling ventrally on male hind femora (Figures 2(b)-2(e)) as the main diagnostic characteristic of Ctenodontina.Fisher [4] comments that this is an unreliable generic character-this condition not present in all species and Ctenodontina is better defined by its very distinctive male and female terminalia.
The species name is dedicated to Dr. Nair Aguiar, a professor from Universidade Federal do Amazonas.2.2.7.Geographical Records.Brazil: Amazonas state (Figure1).2.2.8.Comments.C. nairae Vieira sp.nov.differfrom otherCtenodontina species by the characters presented in the identification key.Furthermore, C. nairae Vieira sp.nov.can be separated from Ctenodontina sp.(Argentina) because it do not possess a spinous swelling ventrally on male hind femora (Figures