Ischnochlorops lefevrei, Raile, Riccardi Paula & Souza, Amorim Dalton De, 2013

Raile, Riccardi Paula & Souza, Amorim Dalton De, 2013, The Neotropical chloropine genus Ischnochlorops Paganelli 2002 (Diptera: Chloropidae), with the description of a new species, Zootaxa 3750 (3), pp. 289-294 : 292-293

Ischnochlorops lefevrei sp. nov.

( Figs. 2, 4, 6 , 8, 10, 12 )

Diagnosis. Thorax brown, scutum stripes inconspicuous; surstylus apically bilobed, spiny; mesolobus trapezoidal; proctiger moderately developed.

Material examined. Holotype ♂, Brazil, São Paulo, Campos do Jordão, Eugenio Lefevre, 1,200 m, 28.ix.1962, Lauro Travassos Filho, Papavero, Rabelo, L. Silva & Zanettin coll. (MZUSP).

Description. Male. Total length, 6.15 mm. Wing length, 4.1 mm. Head ( Fig. 4 ). Head dark yellow, slightly wider than thorax, longer than broad in dorsal view, about twice as long as high in lateral view; frontal triangle brown, margins convex at apical third, reaching anterior margin of frons; occiput dark, bare; gena about 0.25 eye height, postgena about 0.3 eye height; eye oval, with few sparse bristles, long axis horizontal; facial carina incomplete, wide, shallow; clypeus indistinct, with a pair of indistinct light brown spots; labella very short, light brown basally, yellow apically; palpus short, clavate, yellow. First flagellomere squarish, dark brown, blackish apically; arista light brown, shortly pubescent. One row of interfrontals on frontal triangle; postocellars parallel; four orbitals; inner and outer verticals close to each other, inconspicuous; one row of setulae at lower margin of gena, no distinct vibrissa. Thorax ( Fig. 2 ). Scutum almost twice as long as broad, dark brown, with blackish stripes, dark pilosity inserted at rounded punctures; scutellum short, brown, also with punctures. Pleura dark yellow; post–pronotum without bristles; anepisternum with a black marking along ventral margin; a black marking on ventral half of katepisternum; anepimeron with a dark spot on ventral margin. Notopleurals 0+2, very delicate, only slightly longer and darker than scutum setation. Halter light brown, with a long stem. Legs dark yellow, presence of the tibial organ unclear. Wing ( Fig. 6 ). Membrane light brownish. Costal sections 1–4: 21–15–10–3. R2+3 straight; R4+5 slightly concave at apex; R4+5 and M1+2 slightly divergent; M1+2 slightly convex at apex; r-m and dm-cu parallel, distant from each other 1.5 as long as dm-cu. Abdomen. Tergites and sternites light brown. Terminalia ( Figs. 8, 10, 12 ). Hypandrium not observed. Pre- and postgonites connected, aligned; postgonite elongated, acute distally, with one bristle and sensorial pores; pregonite long, thin; basiphallus rounded; phallapodeme short. Epandrium rounded; surstylus truncated, apically divided in two, pilose, with some bristles and a row of spines at apex; proctiger moderately developed, flap-shaped; mesolobus trapezoidal, slightly bilobed apically.

Female. Unknown.

Etymology. The specific epithet of this species refers to the type –locality, the railroad station Eugenio Lefevre, inaugurated in 1916. It was named after the engineer who projected the railroad reaching that spot at the altitude of almost 1,200 m above sea level in the Serra da Mantiqueira.

Comments. The male genitalia of the holotype had already been prepared when the specimen was examined. The genitalia was in the vial, but the hypandrium was unfortunately not in the vial. Campos do Jordão, in the State of São Paulo, the type-locality of the species, is more to the north than the known distribution of I. trilineatus . Nevertheless, it is an area of considerable altitude and with occurrence of Araucaria , indicating that the genus may be restricted to southern parts of the Atlantic Forest. Both species of Ischnochlorops have the scutum considerably flattened and covered with delicate, scattered scutal setation. The notopleurals are also delicate and it is hard to discern between scutal setae and the notopleurals.

Key to the species of Ischnochlorops

1. Thorax yellow, with five conspicuous blackish stripes; surstylus not bilobed apically, without spines; mesolobus almost square; proctiger well developed ( Figs. 6 , 8, 10 )................................................... I. trilineatus Paganelli

- Thorax brown, stripes inconspicuous; surstylus apically bilobed, spinose; mesolobus trapezoidal; proctiger moderately developed ( Figs. 7, 9, 11 )..................................................................... I. lefevrei sp. nov.

Figures

FIGURES 1 – 6. Ischnochlorops. 1, 3, 5. Ischnochlorops trilineatus. 1. Habitus. 3. Head dorsal. 5. Wing. 2, 5, 6. Ischnochlorops lefevrei sp. nov. 2. Habitus. 4. Head dorsal. 6. Wing.

FIGURES 7 – 12. Ischnochlorops, male genitalia. 7, 9, 11. Ischnochlorops trilineatus. 7. Terminal view of epandrium. 9. Ventral view of epandrium. 11. Hypandrium and phallic complex ventral. 8, 10, 12. Ischnochlorops lefevrei sp. nov. 8. Terminal view of epandrium. 10. Ventral view of epandrium. 12. Phallic complex ventral. Abbreviations: ep, epandrium; hyp, hypandrium; mes, mesolobus; prc, proctiger; sur, surstylus; phal, phallapodeme; phas, phallapodemic sclerite; pog; postgonite; prg, pregonite; dis; distiphallus; bas, basiphallus.