Phytobia spinifera, 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 : 17-21

Phytobia spinifera sp. nov.

http://zoobank.org/ D63A0B19-13C7-4122-88BA-D767A20677FA

Figs 4, 24, 35, 87–89

Type material. Holotype ♂: BRASIL, MT [Mato Grosso]: Chapada dos Guimarães – Vale da Benção. 15°26’10”S, 55°47’23”W. 11.vii.2012, varredura [sweeping net], Sousa, V. R. col. [ MZUSP] . Paratypes: same data as holotype, 1 ♂ [ MZUSP]; 1 ♂, BRASIL: MT [Mato Grosso], Chapada dos Guimarães (Cerrado) – Trilha da Pedra – final (mirante). 15°24’21.8”S, 055°50’07.5”W. Malaise 22. 18.iv-02.vii.2012. Lamas, Nihei & Eq. cols. [ MNRJ]; 1 ♂, 17.i-09.iii.2012 [ MNRJ] ( Fig. 4) .

Description. Male. Body length 1.8 mm; wing length 1.7 mm ( Fig. 24).

Female. Unknown.

Color. Frons mat black; fronto-orbital plate weakly shining black; upper dark orbit touching ovt and ivt; ocellar triangle mat black; lunule silvery; face greyish-black; clypeus black, slightly shiny; gena brown; antenna and arista entirely blackish-brown; palpus brown; proboscis light yellow; labellum light yellow, with yellow setae; scutum weakly shining black, strongly yellow laterally and before scutellum, black intra-alar area of scutum not reaching scutellum and forming two distinct bands divided by narrow yellow stripe ( Fig. 35); scutellum strongly yellow; postpronotum strongly yellow, with central brownish spot; notopleuron and anepimeron strongly yellow; anepisternum strongly yellow, brown on basal half; katepimeron yellow; katepisternum and meron brown; haltere entirely yellow; calypters whitish-yellow, with margin and fringe brown; wing clear; legs brown with fore knees brownish-yellow; pulvilli light yellow; abdomen yellow, T5 and T6 with median brown spot; terminalia entirely brown.

Head. Frons not visible above eye margin in lateral profile; 2 reclinate ors and 2 inclinate inwards ori, similar in size; orbital setulae slightly reclinate in one row; facial keel undifferentiated; eye margins little divergent towards vertex; eye height/gena+parafacialia: 5; ocellar triangle short, ending before second ors; lunule high, 17.6% of frons length; clypeus rounded; epistoma height 0.02 mm; first flagellomere rounded and finely pubescent; arista longer than eye height, finely pubescent; vibrissa short and thin, measuring less than 1/3 of aristal length.

Thorax. Acr in seven irregular rows; prsc absent; 1+3 dc, increasing in length from presutural; 2 npl, similar in size. Wings. Wing tip nearer to R 4+5 than to M; R 4+5 and M erect; C sections 2–4 in proportion: 0.58:0.25:0.16; ultimate section of CuA 1 0.9 length of basal section; r-m distal to midpoint of dm. Legs. Fore tibia without pd; mid tibia with 2 pd on middle third.

Terminalia. Epandrium rounded with long setae; cercus very long, with almost same size of height of epandrium and with long setae and distinct seta on apex in lateral view; postgonite with one basal seta in ventral view; surstylus rounded with about 8–13 setae and two strong spines; hypandrium U-shaped; phallapodeme about twice length of hypandrium; mesophallus tubular; distiphallus bulb-shaped with one apical spine on each side ( Figs 87, 88); ejaculatory apodeme broad, at its broader part about 4.0 times wider than constricted area at base ( Fig. 89).

Distribution. Mato Grosso ( Brazil).

Etymology. The specific epithet refers to the presence of two spines on the distiphallus.

Remarks. This new species is close to P. delicata sp. nov. in external characteristics and coloration of the body, but it can be distinguished by the male terminalia with a basal seta on postgonite, surstylus with about 11–13 setae and two strong spines, and distiphallus bulb-shaped with one apical spine on each side.