Ischnochlorops trilineatus Paganelli

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 : 290-292

Ischnochlorops trilineatus Paganelli

( Figs. 1, 3, 5 , 7, 9, 11 )

Ischnochlorops trilineatus Paganelli 2002: 38 , figs. 113–114. Type-locality: Brazil, Santa Catarina, Nova Teutônia.

Diagnosis. Thorax yellow, scutum with five blackish stripes; surstylus pointed apically; mesolobus almost square; proctiger well developed.

Material examined. Paratype ♂, Brazil, Paraná, Umuarama, 5–11.x.1980, Malaise trap, A.F. Yamamoto coll. (DZUP).

Redescripion. Male. Total length, 4.0–5.4 mm. Wing length, 3.2 mm. Head ( Figs. 1, 3 ). General color yellow, slightly wider than thorax, longer than broad in dorsal view, almost 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 yellow, about 0.2 eye height, postgena short; eye oval, bare, long axis horizontal; facial carina incomplete, present only on dorsal fourth; clypeus indistinct, with two brownish spots; labella reduced, yellow; palpus short, clavate, yellow. First flagellomere slightly longer than wide, brown; arista light brown, pubescence short. One row of interfrontals along frontal triangle margin; postocellars almost parallel; four orbitals; inner and outer verticals approximate, almost indistinct; frons with few setulae; one row of setulae at lower genal margin, no distinct vibrissa. Thorax ( Fig. 1 ). Scutum almost twice as long as broad, yellow, with five longitudinal blackish stripes, dark pilosity inserted on punctures; scutellum 0.17 the scutum length, also with punctures, yellow. Pleura yellow, except for black marking on ventral half of katepisternum and anepimeron with a dark spot on antero-ventral margin; post– pronotum without bristles; notopleuron flap-shaped; anepisternum with a black marking along ventral margin, with thin setulae; katepisternum with thin setulae. Notopleurals 0+1. Halter with light yellow stem, knob pale. Legs yellow; mid and hind femora brownish, all tibiae dark yellow, fore tarsi dark; tibial organ slender, elongate, more than half length of tibia. Wing ( Fig. 5 ). Membrane light brownish. Costal sections one to four: 13.5–10–6–1.5. R2+3 and R4+5 slightly concave at apex; R4+5 and M1+2 divergent; M1+2 weak, slightly convex beyond dm-cu; r-m and dmcu slightly divergent, distant from each other 2 times length of dm-cu. Abdomen. Tergites and sternites dark yellow. Terminalia ( Figs. 7, 9, 11 ). Hypandrium with two basal rounded projections, apex of arms, external projection short, internal, long. Pre- and postgonites connected, aligned; postgonite short, acute distally, with one to two bristles and sensorial pores; pregonite long thin; basiphallus rounded; phallapodeme slightly elongate. Epandrium trapezoidal; surstylus truncate, pilose; proctiger well developed, flap-shaped; mesolobus almost square, slightly bilobed apically.

Female. Unknown.

Comments. The holotype of I. trilineatus is referred to be deposited in the Canadian National Collection in Ottawa (Paganelli 2002: 38). Unfortunately the specimen was never sent to the depositary collection (Paganelli, pers. com.) and could not be found at the MZUSP collection. The paratype, from Umuarama, state of Paraná, was found and examined. The phallapodemic sclerite could not be observed in the paratype, though the original description (Paganelli 2002, Fig. 114) states that this structure is present, similarly to the structure seen in I. lefevrei sp. nov. The occurrence of I. trilineatus in the west of the State of Paraná is not surprising. In both areas we find Atlantic Forest with Araucaria angustifolia (Bertoloni) Otto Kuntze (Conifera, Araucariaceae ), which has typically more temperate elements of the Diptera fauna (see, e.g., Oliveira & Amorim 2010a,b).

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.