Macrostomus nitidus , 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: 51-53

publication ID

http://doi.org/ 10.5281/zenodo.281632

persistent identifier

http://treatment.plazi.org/id/03E59A56-FF97-FF8C-FF7B-FA7E67ECAE1C

treatment provided by

Plazi

scientific name

Macrostomus nitidus
status

sp. nov.

Macrostomus nitidus  , sp. nov.

( Figs. 32–43View FIGURES 32 – 38View FIGURES 39 – 43)

Diagnosis. Postgenal and antepronotal setae weaker than dorsal thoracic setae. Thorax and legs predominantly yellow. Abdomen shinning black. Male wing infuscated at apex; female wing infuscated at costal margin. Flagellum short pilose. Posterior tibia with long setae. Hypandrium distinctly wider at apex.

Description. Holotype male. Body length 3.0 mm; wing length 3.9 mm. Head with frons shining black, as large as anterior ocellus width. Face less shining black, as wide as frons, slightly gray pruinose at apex. Ocellar tubercle slightly protuberant with 2 pairs of ocellar setae, posterior pair minute. Postcranium black, gray pruinose. Antenna velvety black with pedicel yellowish. Flagellum pubescent, with 3 flagellomeres. Proboscis yellow, brown at base. Palpus light brown to yellow. Thorax shining yellow with scutum and scutellum darker with more distinct gray pruinescence. Postpronotal and postalar lobes yellow. Depending on light incidence, in anterior view scutum with wide, dark stripe or 2 narrow dark stripes between dorsocentral setae. Thoracic setae: 4 dorsocentrals with posterior stronger; 3 postpronotals with 1 longer; 3 notopleurals with posterior stronger; 2 pairs of scutellars with inner pair slightly convergent; 4 antepronotals; 2–3 proepisternals; 6 katatergitals with anterior row stronger; other setae as described for limbipennis  species-group (diagnosed above). Legs shining yellow with apices of hind femur, fore tibia and mid tibia darker. Hind tibia and all tarsi black with fore tarsomeres 1–4 white distally. Femora/tibiae setae slightly stronger: fore tibia ( Fig. 32View FIGURES 32 – 38) with 1 anterodorsal seta near base, 1 posterior near middle; mid femur ( Fig. 33View FIGURES 32 – 38) with 1 strong anterior seta near apex; mid tibia with 2 anterodorsals, 1–2 posterior along basal half, 1–2 anteroventral at middle of distal half; hind femur ( Fig. 34View FIGURES 32 – 38) with 2 anterior setae, 1 at basal fifth and 1 at distal fifth, 1 stronger anteroventral at base of distal third, and other slender anteroventral setae; hind tibia with 5–6 slender dorsal setae. Hind tarsomere 1 with 1 longer dorsal and short spine-like setae ventrally. Wing ( Fig. 35View FIGURES 32 – 38) hyaline, brown infuscated at distal margin. Cell dm truncate. Veins M 1, M 2 and A 1 evanescent. Halter light yellow to white. Abdomen shining black with blue reflection in certain lights; lateral bristles longer. Sternites concolorous with tergites. Tergite 8 ( Fig. 36View FIGURES 32 – 38) with small projection inside median distal sinus. Epandrium ( Fig. 37View FIGURES 32 – 38) with anterodorsal and posterodorsal lobes of same height with deep sinus. Anterior cercus very large with internal sinus; posterior cercus elongate; median lobe membranous with long setae. Hypandrium ( Fig. 38View FIGURES 32 – 38) with many setae along posterior margin, with wider apex. Ejaculatory apodeme with short dorsal lamella.

Female. Body length 3.4 mm; wing length 3.7 mm. Frons and face wider than anterior ocellus width and wider than in male. Wing ( Fig. 39View FIGURES 39 – 43) with cell r 1 and base of cell r 2 + 3 brown infuscated. Fore tarsi unicolorous. Tergite 8 ( Fig. 40View FIGURES 39 – 43) with median and basal heavily sclerotized area. Sternite 8 ( Figs. 41, 42View FIGURES 39 – 43) distinctly curved with anterior third thinner, ventrally more sclerotized at median third. Tergite 10 with basal incision ( Fig. 40View FIGURES 39 – 43) [cerci broken]. Genital fork ( Fig. 43View FIGURES 39 – 43) small. Genital chamber membranous.

Geographical distribution. Brazil (Goiás, Mato Grosso).

Type Material. HOLOTYPE ɗ: “[ BRASIL], Est[ado] de Goiás, Corumbá, F.[azenda] Monjolinho, 11–945 [xi. 1945], Barreto col.” // “ Macrostomus nitidus Holótipo  ɗ” ( MZSP). PARATYPES. Same data as holotype (1 ɗ, 1 Ψ, MZSP; 1 ɗ, INPA). Mato Grosso, Chapada dos Guimarães [15 ° 26 '13.7''S 55 ° 47 '27.0''W], 22–30.xi. 1983, J.E. Bindá, arm. Malaise ( INPA) (4 ɗ, INPA; 3 ɗ, CNC).

Etymology. From Latin nitidus  = shining, in reference to the shining black abdomen.

MZSP

Sao Paulo, Museu de Zoologia da Universidade de Sao Paulo

INPA

Instituto Nacional de Pesquisas da Amazonia

CNC

Canadian National Collection of Insects, Arachnids, and Nematodes

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Diptera

Family

Empididae

Genus

Macrostomus