Phytobia lamasi, 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 : 7-8

Phytobia lamasi sp. nov.

http://zoobank.org/ BA8CEDF4-052E-4E49-993E-512DABA3E618

Figs 2, 13, 31, 58–60

Type material. Holotype ♂: BRASIL, RO [Rondônia]: Campo Novo. Fazenda Amorim. 10°40’6”S, 63°29’0”W – 248m, Malaise trap 6m, 03–15.xii.2011, Amorim, Ament & Riccardi cols . Paratypes: same data as holotype, 1 ♂ [ MZUSP], 2 ♂ [ MNRJ] ( Fig. 2) .

Description. Male. Body length 2.4–2.5 mm; wing length 1.9–2.0 mm ( Fig. 13).

Female. Unknown.

Color. Frons mat black; fronto-orbital plate black, weakly shining; upper dark orbit touching ovt and ivt ocellar triangle black, greyish pollinose; lunule silvery; face greyish-brown; clypeus black subshining; gena dark brown; scape and pedicel brown; first flagellomere dark brown; arista and palpus brown; proboscis and labellum yellow, with yellow setae; scutum weakly shining black, with yellow area before scutellum ( Fig. 31); scutellum light yellow; postpronotum light yellow, with brown small basal spot; notopleuron and anepimeron light yellow; anepisternum light yellow, with brown area at base; katepimeron light yellow, katepisternum and meron brown; haltere entirely light yellow; calypters light yellow, with margin and fringe black; wing clear; legs brown with fore knees brownish-yellow; pulvilli yellow; abdomen yellow, with brown stripe on tergites 3–5, tergite 6 almost entirely brown; terminalia 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 undifferenciated; eye height/parafacialia+gena: 4.5; ocellar triangle short, ending before second ors; lunule high, about 23% of frons length; clypeus rounded; epistoma height 0.03 mm; first flagellomere rounded and finely pubescent; arista long, almost same vertical height of eye, finely pubescent; vibrissa short and strong, 1/3 of aristal length.

Thorax. Acr in eight irregular rows; prsc absent; 1+3 dc, presutural short and thin first postsutural broken, second and third long and strong; 2 npl, similar in size. Wings. Wing tip between R 4+5 and M; R 4+5 and M sligtly recurved; C sections 2–4: 0.66:0.2:0.13; ultimate section of CuA 1 0.85 length of basal section; r-m basal to midpoint of dm. Legs. Fore tibia without pd (present in one paratype); mid tibia with 2 pd on middle third.

Terminalia. Epandrium rounded with long setae; cercus short, about 1/3 height of epandrium, setulose and with 4 distinct long apical setae; postgonite with 3–4 short setae at apex; surstylus rounded, with about 12 setae; hypandrium U-shaped; phallapodeme about twice length of hypandrium; mesophallus simple and straight; distiphallus rounded with two sclerotized areas centrally ( Figs 58, 59); ejaculatory apodeme broad, at its broader part about 3.3 times wider than constricted area at base ( Fig. 60).

Distribution. Rondônia ( Brazil).

Etymology. The specific epithet is in honor of Dr. Carlos Einicker Lamas (Museu de Zoologia, Universidade de São Paulo) in recognition of his great contribution to the Brazilian Diptera fauna knowledge.

Remarks. This new species resembles P. spinifera sp. nov. and P. delicata sp. nov. in the general coloration of the body and chaetotaxy, but can be distinguished from them by the yellow abdomen with a brown stripe on tergites 3–5 and tergite 6 almost entirely brown. It also differs by the presence of 3–4 short setae at apex of postgonite, surstylus with about 12 setae, and distiphallus rounded with two sclerotized areas centrally.