Phytobia delicata, Sousa & Couri, 2017

Sousa, Viviane Rodrigues de & Couri, Márcia Souto, 2017, Phytobia (Diptera: Agromyzidae) from Brazil: new species, new record and a key to the Neotropical species, Zoologia (e 12308) 34, pp. 1-25 : 5-6

Phytobia delicata sp. nov.

http://zoobank.org/ EE2FE185-30A1-4DCB-B083-4B26D0D9FF2E

Figs 2, 8, 9, 29, 45–49

Type material. Holotype ♂: BRASIL: MT [Mato Grosso], Chapada dos Guimarães (cerrado) – Trilha da Cach. Andorinha. 15°20’33.37”S, 056°47’37.16”W. Coleta ativa. 17.i.2013. Lamas, Nihei & Eq. cols . Paratypes: 1 ♀, Trilha da Pedra – final (mirante). 15°24’21.8”S, 055°50’07.5”W. Malaise 22. 17.i-09.iii.2012 ; 1 ♀, BRASIL, MS [Mato Grosso do Sul]: Corumbá, BEP – Mata Ciliar, Rio Miranda , 76m . 19°34’30.06”S, 57°00’52.4”W. 18.ix- - 03.x.2011. Malaise 03. Lamas, Nihei & eq. cols.; 2 ♀ Corumbá, BEP, Paratudal , 104m . 19°34’11.4”S, 57°01’08.5”W. 02.xi-02. xii.2011. Malaise 01. Lamas, Nihei & Eq. col.; 2 ♀, 01–16. viii.2012. [all in MZUSP] ( Fig. 2) .

Description. Male. Body length 1.8 mm; wing length 1.7 mm ( Fig. 8).

Female. Body length 2.1–2.2 mm; wing length 1.9–2.2 mm ( Fig. 9).

Color. Frons mat black; fronto-orbital plate shining black; upper shiny dark orbit touching ovt and ivt; ocellar triangle mat black; lunule silvery; face greyish-black; clypeus black subshining; gena brown; antenna and arista entirely brown; palpus brown; proboscis yellow; labellum yellow, with yellow setae; scutum weakly shining brown, light yellow laterally and before scutellum, black ia area of scutum not reaching scutellum and forming two distinct bands divided by narrow yellow stripe ( Fig. 29); scutellum light yellow, with sub-basal lateral brown spot; postpronotum light yellow, with basal brownish spot; notopleuron and anepimeron light yellow; anepisternum light yellow, with small brown spot on basal half; katepimeron light yellow, katepisternum and meron brown; haltere entirely yellow; calypters light yellow, with margin and fringe brown; wing clear, light yellow at base; legs brown with all knees yellow; pulvilli light yellow; abdomen yellow, tergite 5 and tergite 6 with median brown stripe touching at limit of tergites; terminalia entirely brown.

Head. Frons slightly visible above eye margin in lateral profile; 2 reclinate ors and 2 inclinate inwards ori, first ori more inclinate than second ori and slightly thinner and shorter than others; orbital setulae slightly reclinate in one row; facial keel undifferenciated; eye height/parafacialia+gena: 6; ocellar triangle short, ending shortly after second ors; lunule a little high, about 16% of frons length; clypeus obtuse; epistoma height 0.02 mm; first flagellomere rounded and finely pubescent; arista long, same size vertical height of eye, finely pubescent; vibrissa short and thin, measuring about 1/3 of aristal length.

Thorax. Acr in six irregular rows; prsc absent; 1+3 dc, presutural thinner and shorter than others, second broken, third and fourth long and strong; 2 npl, similar in size. Wings. Wing tip nearer R 4+5 than to M; R 4+5 and M erect; C sections 2–4: 0.72:0.18:0.09; ultimate section of CuA 1 0.9 length of basal section; r-m basal to midpoint of dm. Legs. Fore tibia without pd; mid tibia with 2 pd on middle third.

Terminalia. Epandrium rounded with long setae; cercus long, slightly more than 2/3 height of epandrium and with long setae and 2 distinct at apex; surstylus rounded with about 11–19 setae; hypandrium U-shaped; phallapodeme about 2.5 times length of hypandrium; basiphallus and distiphallus membranous; distiphallus membranous, sclerotized centrally ( Figs 45, 46); ejaculatory apodeme broad, at its broader part about 3.7 times wider than constricted area at base ( Fig. 47). Oviscape ( Fig. 48). Spermathecae ( Fig. 49).

Distribution. Mato Grosso and Mato Grosso do Sul ( Brazil).

Etymology. The specific epithet refers to the membranous and delicate phallus.

Remarks. Phytobia delicata sp. nov. is morphologically similar to P. spinifera sp. nov. in external characters and coloration of the body, but can be differentiated by the rounded surstylus with about 11–19 setae and distiphallus membranous, sclerotized centrally.