Phytobia niheii, 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 : 12-15

Phytobia niheii sp. nov.

http://zoobank.org/ BA74B462-94FA-4038-AA47-5AB30CDFA5B3

Figs 3, 18, 19, 33, 71–75

Type material. Holotype ♂: BRASIL: RO [Rondônia]: Campo Novo. Fazenda Amorim 10°40’6”S, 63°29’0”W – 248m. Malaise trap, 03–15.xii.2011. Amorim, Ament & Riccardi cols. [ MZUSP] . Paratypes: same data as holotype, 3 ♂ [ MZUSP]; 4 ♂ [ MNRJ]; BRASIL:MS [Mato Grosso do Sul]: Aquidauana. Malaise 7. 20°26’03.7”S, 055°39’20.8”W. 22.viii-11.ix.2012. Lamas, Nihei & Eq. cols., 1 ♀ [ MZUSP] ( Fig. 3) .

Description. Male. Body length 2.1 mm; wing length 1.7 mm ( Fig. 18).

Female. Body length 2.4 mm; wing length: 1.75 mm ( Fig. 19).

Color. Frons, fronto-orbital plate and ocellar triangle mat black; upper dark orbit touching ovt and ivt; lunule silvery; face brown; clypeus black subshining; gena dark brown; scape and pedicel brown; first flagellomere brown, yellow apically; arista brown; palpus yellow; proboscis yellow; labellum yellow, with yellow setae; scutum brown with grey pollinose, light yellow before scutellum ( Fig.33); scutellum light yellow, brown laterally at basal two-thirds; postpronotum light yellow, with brown spot centrally;notopleuron light yellow; anepimeron dark brown, with upper and posterolateral margins yellow; anepisternum, katepimeron, katepisternum and meron dark brown; haltere entirely yellow; calypters light yellow, with margin and fringe black; wing clear, yellow at base; legs dark brown with fore knees yellow; pulvilli yellow; abdomen yellow, with dark brown spot centrally in all tergites, tergites 3–6 with dark brown spot on each side; terminalia dark brown.

Head. Frons slightly visible above the eye margin in lateral profile; 2 reclinate ors and 2 inclinate inwards ori, similar in size; orbital setulae erect, in one row; eye bare; facial keel undifferenciated; eye height/parafacialia+gena: 8; ocellar triangle short, ending before the second ors; lunule slightly high, 16,6% of frons length; clypeus obtuse; epistoma height 0.05 mm; first flagellomere rounded and finely pubescent; arista long, more than 2/3 of the vertical height of eye, finely pubescent; vibrissa short and strong, measuring 1/3 of the aristal length.

Thorax. Acr in six irregular rows; prsc absent; 1+3 dc, increasing in length from presutural; 2 npl, similar in size. Wings. Wing tip between R

4+5

and M; R

4+5

and M erect; C sections 2–4 in proportion: 0.58: 0.25: 0.16; ultimate section of CuA 1 1.14 length of basal section; r-m distal to midpoint of dm. Legs. Fore tibia without pd; mid tibia with 1 pd on middle third.

Terminalia. Epandrium triangular with long setae; cercus short, about 1/3 height of epandrium and with setae; surstylus short, with about 19 setae; hypandrium U-shaped and short; phallapodeme about three times length of hypandrium; basiphallus with two arms; distiphallus straight ( Figs 71, 72); ejaculatory apodeme small, at its broader part about 2.1 times wider than constricted area at base ( Fig. 73). Oviscape ( Fig. 74). Spermathecae ( Fig. 75).

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

Etymology. The specific epithet is in honor of Dr. Silvio Nihei (Universidade de São Paulo) in recognition of his great contribution to our knowledge of the Neotropical Diptera .

Remarks. This new species is morphologically similar to P. cacaulandia sp. nov., but can be distinguished by the clear wing, only one median seta on mid tibiae, and male terminalia with a conspicuously triangular epandrium, surstylus short, with about 19 setae, phallapodeme long, about three times the length of hypandrium, basiphallus with two arms, distiphallus straight, and ejaculatory apodeme small.