Macrostomus inflatus , Rafael, José Albertino & Cumming, Jeffrey M., 2012

Rafael, José Albertino & Cumming, Jeffrey M., 2012, Revision of the genus Macrostomus Wiedemann (Diptera, Empididae, Empidinae). III. The limbipennis species-group, Zootaxa 3361, pp. 45-55: 47-48

publication ID 10.5281/zenodo.281632

persistent identifier

treatment provided by


scientific name

Macrostomus inflatus

sp. nov.

Macrostomus inflatus  , sp. nov.

( Figs. 1–11View FIGURES 1 – 11)

Diagnosis. Fore tarsomere 1 of male swollen dorsally. Wing entirely hyaline with inconspicuous pterostigma.

Description. Holotype male, previously preserved in alcohol; specimen somewhat discolored by alcohol action. Body length 2.6 mm; wing length 3.9 mm. Frons shining black, wider than anterior ocellus width. Face slightly narrower than frons, approximately as wide as anterior ocellus width. Ocellar tubercle slightly protuberant with 1 pair of ocellar setae. Postcranium black, gray pruinose. Antenna yellow, flagellum with one flagellomere.

Proboscis yellow. Palpus yellowish. Thorax shining black, gray pruinose; postpronotal and postalar lobes slightly yellow. Thoracic setae: 2 antepronotals; 1–3 minute proepisternals; 5–7 katatergitals; other setae as described for limbipennis  species-group (diagnosed above). Legs shining yellow with mid and hind coxae, hind tibia and all tarsi slightly darker. Femora/tibiae setae slightly stronger: mid tibia ( Fig. 2View FIGURES 1 – 11) with 1 anterodorsal, 1 posterodorsal near middle, 2–3 ventral along distal half; hind femur ( Fig. 3View FIGURES 1 – 11) with 1 anteroventral at distal third; hind tibia ( Fig. 3View FIGURES 1 – 11) with 3–4 slender dorsal setae. Hind tarsomere 1 with one longer dorsal seta. Fore tarsus ( Fig. 1View FIGURES 1 – 11) unicolorous with tarsomere 1, swollen dorsally. Wing ( Fig. 4View FIGURES 1 – 11) entirely hyaline with inconspicuous pterostigma. Cell dm truncate. Veins M 1, M 2 and A 1 evanescent. Halter white. Abdomen shining black, more gray pruinose on terminalia. Sternites 1–2 slightly yellow. Tergite 8 ( Fig. 5View FIGURES 1 – 11) with distal sinus. Epandrium ( Fig. 6View FIGURES 1 – 11) with anterodorsal and posterodorsal lobes of same height with shallow sinus. Anterior cercus very large with internal sinus; posterior cercus somewhat short; median lobe membranous with long setae. Hypandrium ( Fig. 7View FIGURES 1 – 11) with setae medially and apex somewhat simple. Ejaculatory apodeme with short dorsal lamella.

Female. Body length not measured; wing length 2.4 mm. Frons and face as in male. Fore tarsomere 1 not swollen. Hind femur without anteroventral setae. Hind tibia with 3 dorsal setae. Tergite 8 ( Figs. 8, 9View FIGURES 1 – 11) with distinct distal sulcus. Sternite 8 ( Figs. 8, 10View FIGURES 1 – 11) highly modified, with distinct sulcus ventrally and laterally. Genital fork ( Fig. 11View FIGURES 1 – 11) small with apex short U –shaped. Genital chamber membranous.

Geographical distribution. Brazil (Distrito Federal).

Type Material. HOLOTYPE ɗ: “ BRASIL, DF [Distrito Federal], Brasília, Res[erva] Biol[ógica] [do] IBGE, Brejoi (sic, = Brejo) Taquara [15 ° 57 '21.93''S – 47 ° 53 '18.32''W], iv. 1981, B.F.S. Dias et al. Cols.” // “ Macrostomus inflatus Holótipo  ɗ” ( INPA). PARATYPES. Same data as holotype, v. 1981 (1 Ψ, INPA); 18–25.iii. 1982 (1 ɗ, INPA, body entirely in microvial with glycerin).

Holotype condition. Pinned (previously preserved in alcohol), in good condition.

Etymology. From Latin inflatus  = swollen, in reference to the swollen shape of the male fore first tarsomere.


Instituto Nacional de Pesquisas da Amazonia