Cheiromyia brevitarsis Brooks, sp. nov.
Creators: name: Brooks, Scott E.
name: Cumming, Jeffrey M.
name: Pollet, Marc A. A.
Publisher: name: Zenodo
Year: 2010
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Diptera
Dolichopodidae
Cheiromyia
Cheiromyia brevitarsis

description: Cheiromyia brevitarsis Brooks sp. nov.
(Figs. 2D, 4A–D, 8A)
Recognition (male). This species can be distinguished based on the following combination of characters: postpedicel subovoid basally with narrow elongate apical projection and 3–5 pubescent digitiform projections on outer surface (cf. Fig. 1 B); TI slightly swollen, tarsus I with It2 shorter than It3, It3–4 with row of erect setae on inner margin (Fig. 4 A); left apv epandrial lobe lacking acute apicodorsal process (Fig. 4 B). This species is very similar to C. laselva Brooks sp. nov. (see description below and Fig. 5).
Description. Male: Body length: 3.8–4.2 mm, wing length: 3.2–3.5 mm. Head: Postocular setae: upper 5–7 dark, lower setae pale, lowermost seta dark brownish or pale. Frons subrectangular (wider than high), dark with blue-green and violet metallic reflections. Face silvery white, relatively broad (Fig. 2B), sides convergent below. Clypeus concolorous with face, subquadrate, lower margin slightly wider. Palpus pale, ovoid, bare above, with several fine long setulae on lower edge. Proboscis: anterior surface of each labellar lobe with close-set row of 3 fine elongate hairs. Antenna: similar to C. laselva and C. palmaticornis (cf. Fig. 1 B), scape, pedicel and base of postpedicel pale, apical part of postpedicel and stylus dark; scape obconical, with acute medial and ventral process; pedicel short; postpedicel ovoid basally with digitiform, pubescent apex, outer surface with 3–5 pubescent digitiform projections, basalmost projection broader, projections occasionally bifurcate; stylus dorsal, before middle of dorsal margin of postpedicel, basal article elongate, extending to tip of postpedicel, distal article strongly pubescent. Thorax: Scutum metallic green with blue and violet or coppery reflections, dark bronze patch above notopleuron immediately posterior to suture. Scutellum concolorous with scutum. Mesopleuron gray pruinose with dark often brownish background coloration with metallic green and violet reflections. Legs: Mainly pale except as noted below. I: (Fig. 4 A) CxI usually pale, sometimes infuscated; TI slightly swollen; tarsus I with pronounced outward bend, It2 shorter than It3, It3–4 with row of erect setae on inner margin, setae more closely set on It4, It3–5 with pale velvety pile on ventral surface, claws enlarged and stout (often crossed in preserved specimens). II: CxII with lateral surface and outer margin of anterior surface dark; tarsus II weakly infuscate from tip of IIt1- 5. III: CxIII with lateral surface pale to dark; tarsus III weakly infuscate from tip of IIIt1- 5. Wing: Hyaline; with pronounced arc beyond bend (Fig. 2D), similar to C. laselva. Abdomen: Tergites 1–5 metallic green, with silverish pruinosity laterally. Hypopygium (Figs. 4 B–D): Epandrium with bv epandrial lobe not developed; apv epandrial lobe projecting ventrally, subrectangular, with 2 long apicolateral setae, apicolateral margin forming a darkened crest, narrowing to dentiform process apicoventrally, medial surface with bulging weakly sclerotized to membranous lobe, left and right apv epandrial lobes slightly asymmetrical, left lobe longer. Surstylus: dorsal arm with sac-like medioventral lobe, with short finger-like dorsal process bearing apical seta, apex with microtrichia ventrally; ventral arm with stout curved apical seta, apex rounded, subapical crest present. Postgonite digitiform. Cercus mainly pale with dark outer margin, subovoid, apical margin somewhat truncate. Hypandrium with medial notch apically. Phallus slightly widened preapically, preapical flap-like dorsal process with weak longitudinal serrate ridges basally. Ejaculatory apodeme with weak ventral curve. Female: Similar to male except as follows: Face and clypeus broader, face parallel-sided. Palpus with only short setulae and 1 strong apical seta. Proboscis lacking close-set row of long hairs on anterior surface of each labellar lobe. Antenna unmodified, postpedicel lacking projections, about as long as wide, apex acute. TI not swollen; tarsus I lacking distinct outward bend; It2 subequal to slightly longer than It3; It3–4 lacking distinct row of erect setae on inner margin; It3–5 lacking velvety pile ventrally; claws normally developed. Terminalia as in generic description.
Type material. HOLOTYPE 3, labelled: “ FRENCH GUIANA: Sinnamary/ (Commune), Sinnamary, Pointe/ Combi [05°18'N 52°56'W], 1–31.x.2000, rainforest/ MT, Philippe Cerdan/ FRGY /2000/008”; “ HOLOTYPE / Cheiromyia brevitarsis / Brooks” [red label] (CNC). PARATYPES: BRAZIL: 13 Amapá, Serra do Navio (00°53'45"N 52°00'07"W), 30.ix.1957, J. Lane (MZSP); 13 Amazonas, Manaus (03°06'S 60°01'W), INPA-V8, 17.v.1982, J.A. Rafael (INPA); 13, 2Ƥ Amazonas, Manaus, Puraquequara (03°03'S 59°51'W), Prato Amarelo, xi.1998, J. Vidal (INPA); 13 Maranhão, Carolina (07°20'S 47°28'W), Rio Lages, 12.xii.2001, J.A. Raphael, F.L. Oliveira, & J. Vidal, Malaise trap (INPA); 13 Pará, Barreirinhas (ca. 04°25'S, 56°13'W), Rio Tapajós, x–xi.1970, Exp. Perm. Amaz. (MZSP); 13 Pará, Faz. Taperinha (02°31'S 54°17'W), near Santarém, 1–11.ii.1968, Exp. Perm. Amaz. (MZSP); 23 Pará, Tucuruí, Morro do senador, 03°59'23"S 49°44'45"W, xii.2001, Malaise, J.A. Rafael & J. Vidal; 33 Roraima, Rio Uraricoera, Ilha de Maraca (ca. 03°22'N 61°25'W), 2–13.v.1987, Malaise trap, J.A. Rafael, J.E.B. Brasil, L.S. Aquino (INPA), 23 same except 18–28.vii.1987, J.A. Rafael, L.S. Aquino, J.F. Vidal, Elias Binda (INPA), 13 same except Shannon trap (INPA). COLOMBIA: 13 Meta, PNN Tinigua, Caño Nevera (2°11'N 73°48'W), 390 m, 20–23.xii.2001, Malaise trap, D. Campos (CO/2620) (MPCB). GUYANA: 13 Kanuku Mountains, Kumu River & Falls (3°15.9'N 59°43.5'W), 28–30.iv.1995, Wayne N. Mathis (USNM); 13 Mazaruni, 2nd Growth (Low Forest), 25.viii.1937, Richards & Smart, B.M. 1937–776, prey of asilid Ommatius marginellus (Fabricius) (BMNH); 13 Mazaruni, clearing, in colony house, 27.viii.1937, Richards & Smart, B.M. 1937–776 (BMNH). FRENCH GUIANA: 23 same as holotype except 3–24.x.2000, FRGY /2000/007 (CNC); 13 Sinnamary (Commune), Sinnamary, Petit Saut (05°11'N 52°51'W), 1–31.x.2000, Malaise trap, Philippe Cerdan, FRGY / 2000/010B (CNC); 13 Kourou (Commune), Kourou (05°09'N 52°38'W), Piste Soumourou, 1–30.xi.2002, Malaise trap, D. Fauré, FRGY /2002/009B (MPCB).
Distribution. Cheiromyia brevitarsis is known from northern South America, including Colombia, Guyana, French Guiana, and the Brazilian states Amapá, Amazonas, Maranhão, Pará, Pernambuco, Roraima and Sergipe (see Capellari & Amorim 2009) (Fig. 8 A).
Remarks. As noted in Brooks (2005), the two BMNH specimens mentioned by Dyte (1980) determined as C. palmaticornis belong to this species. The male and female terminalia of this species were recently illustrated by Capellari and Amorim (2009, figs. 11-14) as Cheiromyia sp.
Etymology. The new species name is derived from the Latin brevis (short) and Greek tarsos (heel), referring to It2 which is shorter than It3.
description: Published as part of Brooks, Scott E., Cumming, Jeffrey M. & Pollet, Marc A. A., 2010, Revision of the Neotropical genus Cheiromyia Dyte (Diptera: Dolichopodidae), pp. 41-58 in Zootaxa 2333 on pages 48-50, DOI: 10.5281/zenodo.193135