Revision of the Brazilian Amazon Basin species of Porphyrochroa Melander (Diptera: Empididae) Author Mendonça, Mirian Nascimento Author Rafael, José Albertino Author Ale-Rocha, Rosaly text Zootaxa 2008 1859 1 39 journal article 10.5281/zenodo.183631 9f2ce723-8926-4f4c-b9f6-a4b596c8c1a9 1175-5326 183631 Porphyrochroa aliena sp. nov. (Figs. 1a–i; 18a; 20) Diagnosis: P. aliena sp. nov. differs from all other studied species due to the presence of four posteroventral spines in the base of hind tibia. Is closely related to P. distincta sp. nov. due to the presence of sternite 5 modified, with projections and setae. It differs from the latter due to the absence of setae in the posterior margin of the hypandrium. Description. Male: body length 3.8 mm ; wing length 2.9 mm . Frons and face shiny brown. Frons slightly narrower than width of anterior ocellus, subparallel sided, with three proclinate setae. Face longer than frons and about twice width of frons. Proboscis light-yellow, length equal to height of head. Palpus brown, with one small and almost apical seta. Ocellar tubercule with vitreous light-yellow ocellus; two ocellar setae; two postocellar setae. Antenna with scape, pedicel and basal fifth of flagellum yellow, remaining segments brown; scape and pedicel medially verticillate; flagellum about four times longer than scape and pedicel combined. Postcranium shiny brown, with distinct brown setae and gray pruinescence; one pair of parallel vertical setae; postocellar setae distinct, with dorsal stronger. Gena and postgena with brown setae and sparse gray pruinescence. Thorax shiny brown with conspicuous postsutural gray pruinescence. Thoracic setae (for explanation of abbreviations see McAlpine (1981, fig. 2.2.64 –2.66)) : 3 ktg; 4 sctl; 2 aprn; 1 prepm; 1 pprn; acr absent or broken; 4 dc; 1 spal presut; 1 spal psut; 1 ntpl; 1 pal. Fore and mid legs yellow with tarsi brown. Distal region of fore and mid tibiae with long strong anteroventral setae. Hindleg dark yellow, with femur brown distally; distal half of hind femur with one row of anteroventral spines and one of posteroventral spines, where hind tibia fits in perfectly between these two rows. Base of hind tibia with four long strong posteroventral spines. All legs with short distinct setae. Wing hyaline with conspicuous pterostigma; anal lobe narrow; R2+3 rather curved ( Fig. 18 a). Halter with pedicel brown and knob yellow. Abdomen shiny brown, with metallic blue luster in diverse light incidence angles. Sternites brown. Tergite 7 narrower anteriorly and with pair of posteroventral protuberances (Fig. 1a); sternite 5 with spiniform setae (Figs. 1b; c); sternite 6 enclosed under tergite 6 in lateral view (Fig. 1c); sternite 7 with distinct protuberance in lateral view (Fig. 1c); sternite 8 wide, with basal sinus (Fig. 1b). Terminalia: Epandrium with digitiform posterior projection bearing small spiniform setae (Fig. 1e). Hypandrium without setae with apex narrower (Figs. 1d; g). Cercus elongate and wide in lateral view (Fig. 1d); in dorsal view with apex convergent (Fig. 1h); ejaculatory apodeme with three projections in anterior view (Fig. 1f); subepandrial sclerite with base longer than arms (Fig. 1i ). FIGURE 1. Porphyrochroa aliena sp. nov. , holotype male: a, Tergites 6–8, dorsal view; b, Sternites 5–8, dorsal view; c, Terminalia, lateral view; d, Hypandrium, phallus, cercus and subepandrial sclerite, lateral view; e, Epandrium, lateral view; f, Ejaculatory apodeme, anterior view; g, Hypandrium, posterior view; h, Cercus, dorsal view; i, Subepandrial sclerite, ventral view. Abbreviation: a cerc, anterior cercus; cerc, cercus; ej apod, ejaculatory apodeme; goncx apod, gonocoxal apodeme; hypd, hypandrium; p cerc, posterior cercus; ph, phallus; sbepand scl, subepandrial sclerite; ST, sternite; T, tergite. Female: Unknown. Distribution: BRAZIL (Amazonas). Type material: Holotype male: BRAZIL , Amazonas , Manaus, PDBFF-WWF, Proj.: Bert Klein / iv.1986 , Malaise / Reserva 1113 / Holotype macho Porphyrochroa aliena ( INPA ) . Paratypes : BRAZIL , Amazonas, Manaus, PDBFF-WWF, Proj.: Bert Klein, i.1985 , Malaise, Reserva 1112 (1 uncertain sex, INPA ); iii.1986 ( 1 male , INPA ); viii.1985 , Malaise, Reserva 1208 ( 15 male , INPA ); iii.1987 ( 1 male , INPA ); iv.1987 ( 1 male , INPA ); i.1985 , Malaise, Reserva 1210 ( 2 male , INPA ); viii.1985 ( 17 male , INPA ); vii.1985 ( 2 male , INPA ); vi.1985 ( 2 male , INPA ); iv.1985 ( 1 male , INPA ); vi.1986 ( 2 male , INPA ); x.1985 ( 3 male , INPA ); i.1985 , Malaise, Reserva 1301 ( 4 male , INPA ); vii.1985 ( 1 male , INPA ); viii.1985 ( 2 male , INPA ); ix.1985 ( 6 male , INPA ); xi.1985 ( 1 male , INPA ); v.1986 ( 1 male , INPA ); vi.1986 ( 1 male , INPA ); Novo Airão AM-352, Ig. Mato Grosso, 21–23.x.1994 , J. Vidal & J. Brasil , Arm. Malaise ( 1 male , INPA ); Manaus, F. P. Alegre BR- 174, Km-68, 17–19.xi.1993 , F. F. Xavier ( 1 male , INPA ); Querari (Pelotão), 06.iv–15.v.1993 , João Vidal ( 7 male , MPEG ; 7 male , MZUSP ). Holotype condition: ocellar setae, postocellar, vertical, prepm, acr, spal presut and psut setae broken; hindleg lost; left wing mounted on microslide in Canada balsam; abdomen within microvial containing glycerin. Microslide and microvial pinned attached to the specimen. Variation: ten specimens with long strong anteroventral setae at distal region of mid tibia. Around 40 specimens preserved in alcohol with thorax and abdomen light-brown. Etymology: from Latin alienus = stranger. It makes allusion to the modifications of sternites 6 and 7.