Porphyrochroa dactiloides , Mendonça, Mirian Nascimento, Rafael, José Albertino & Ale-Rocha, Rosaly, 2008

Mendonça, Mirian Nascimento, Rafael, José Albertino & Ale-Rocha, Rosaly, 2008, Revision of the Brazilian Amazon Basin species of Porphyrochroa Melander (Diptera: Empididae), Zootaxa 1859, pp. 1-39: 10-12

publication ID

http://doi.org/ 10.5281/zenodo.183631

persistent identifier


treatment provided by


scientific name

Porphyrochroa dactiloides

sp. nov.

Porphyrochroa dactiloides  sp. nov.

(Figs. 5 a –i; 18 e; 20)

Diagnosis: P. dactiloides  sp. nov. Is closely related to P. bifida  sp. nov., due to the presence of bifid apex of the cercus. It differs from the latter due to the absence of a pair of posterior projections on tergite 8 and broad lateral posterior projections on sternite 7.

Description. Male: body length 3.0 mm; wing length 2.4 mm.

Frons and face shiny black. Frons slightly narrower than width of anterior ocellus, subparallel sided, with 7 setae. Face slightly longer than frons, subequal in width to frons. Proboscis light-yellow, length equal to height of head. Palpus brown, with one small and almost apical seta. Ocellar tubercule with vitreous lightbrown ocellus; two proclinate ocellar setae; two proclinate postocellar setae. Antenna with scape, pedicel and flagellum brown; pruinescence clothing antenna; 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, arranged in complete single series with dorsal setae stronger. Gena and postgena with brown setae and pruinescence gray and sparse. Thorax FIGURE 5. Porphyrochroa dactiloides  sp. nov., holotype male: a, Tergites 6–8, dorsal view (not represented bristles); b, Sternites 6–8, dorsal view (not represented bristles); c, Terminalia, lateral view; d, Hypandrium, phallus, cercus and subepandrial sclerite, lateral view; e, Hypandrium, posterior view; f, Epandrium, lateral view; g, Ejaculatory apodeme, anterior 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; vpc, ventral projection of cercus.

shiny brown, with conspicuous transverse suture gray pruinescence. Thoracic setae: 6 slender ktg; 4 sctl, larger internal pair; aprn and prepm hidden by foreleg; 2 pprn; 3 acr; 4 dc; 1 spal presut; psut spal broken; 1 npl; 1 pal. Fore and mid legs yellow from coxae to basal half of femora, remaining segments brown; hind coxae, trochanter and basal fifth of femora yellow, remaining segments brown; hind tibia with four posteroventral basal spines. All legs with short distinct setae. Wing hyaline with inconspicuous pterostigma; anal lobe wide ( Fig. 18View FIGURE 18 e). Halter brown. Abdomen shiny brown, with metallic green luster in diverse light incidence angles. Sternites brown. Tergite 7 with pair of distinct posteroventral protuberances (Fig. 5 a); tergite 8 smaller than former ones, lacking protuberances (Fig. 5 a); sternite 7 with two narrow lateral posterior projections (Fig. 5 b); sternites 6 and 7 inclined in lateral view (Fig. 5 c); sternite 8 wide (Fig. 5 b). Terminalia: hypandrium without setae, with two superior projections (Figs. 5 d; e). Cercus elongate in lateral view (Fig. 5 d); apex bifid and internal ventral projection in dorsal view (Fig. 5 h). Epandrium posteriorly projected, with long setae throughout dorsal region and short setae between long setae (Fig. 5 f); ejaculatory apodeme with three projections in anterior view (Fig. 5g); subepandrial sclerite with base shorter than arms (Fig. 5 i).

Female: Unknown.

Distribution: BRAZIL (Amazonas).

Type material: Holotype male: BRAZIL, Amazonas, Autaz Mirim, Faz.[enda] Talismã, 1–15.xii. 1994 / Arm.[adilha] Malaise, Col. J. Bindá / Holotype male Porphyrochroa dactiloides  ( INPA).

Holotype condition: psut spal setae broken; left wing mounted on microslide in Canada balsam; abdomen within microvial containing glycerin. Microslide and microvial pinned attached to specimen.

Etymology: from Greek daktylos = finger. It makes allusion to the epandrial shape, with digitiform projection.


Instituto Nacional de Pesquisas da Amazonia