Chrysopilus semipictus, Santos, Charles Morphy D. & Amorim, Dalton De Souza, 2007

Santos, Charles Morphy D. & Amorim, Dalton De Souza, 2007, Chrysopilus (Diptera: Rhagionidae) from Brazil: redescription of Chrysopilus fascipennis Bromley and description of eleven new species, Zootaxa 1510, pp. 1-33 : 14

Chrysopilus semipictus sp. n.

Figures 34–42

Material. Holotype ɗ, BRAZIL, State of Rio de Janeiro, Parque Nacional Itatiaia, Maromba, 22º 22’S 44º 37’W, VIII/1946, Barreto col. ( MZSP); paratypes: 10 ɗ and 3 Ψ, same as holotype ( MZSP).

Diagnosis. Wing membrane with distinctive anterior dark brown band; aedeagus long; ejaculatory apodeme reaching base of gonocoxite, lateral ejaculatory process wide, projected at right angle.

Male. Body length, 8.0–9.0 mm. Wing length, 6.0–7.0 mm. General color brownish gray. Eyes brown, facets homogenous, ocellar tubercle grayish brown, ocelli brownish. Gena and clypeus yellowish gray to brown, clypeus bare. Scape and pedicel brown, first flagellomere and arista darker; scape with setae, half the length of pedicel; pedicel approximately cubic; first flagellomere oval, as long as pedicel ( Figure 35 ). Maxillary palpus long, slender ( Figure 36 ). Proboscis dark brown, labella brownish yellow. Occiput gray, with silvery iridescent setae.

Thorax brownish gray, scutellum lighter than scutum. Halter bare, stem yellowish brown, brown knob. Coxae brownish gray, femora and tibiae yellowish, both with golden setae. Wing membrane with a distinctive anterior dark brown band ( Figure 34 ); pterostigma pigmented, long, filling almost entirely cell; surroundings of crossveins hyaline; R2+3 reaching C far from R1, not sinuous distally; R4 forking with almost right angle, without short appendage; CuA2 and A1 fusing far from margin; crossvein m-m not so far from origin of M2.

Abdomen homogeneously brown, with golden setae on tergites. Gonocoxite and gonostylus dark brown; gonocoxite wider than long; gonostylus elongated, slightly acuminate distally, long setae laterally, slender setae at medial portion; aedeagus long; ejaculatory apodeme long, reaching base of terminalia; gonocoxal apodeme relatively long, curved inwards; lateral ejaculatory process wide, projected at right angle ( Figure 38 ); meso-anterior incision of tergite IX deep ( Figure 39 ); cercus brownish gray.

Female. Body length, 10.5–12.0 mm. Wing length, 7.0–8.0 mm. Thorax and abdomen similar to male. Anterior margin of sternite VIII acuminate, hypogynial valves with seven long setae ( Figure 41 ); genital fork with anterior end acuminate, distal apodeme wide ( Figure 42 ); cercus two-segmented, distal segment suboval ( Figure 40 ); long common spermathecal and spermathecal ducts; spermathecae subovoid ( Figure 37 ).

Distribution. The species is known only from the type-locality.

Etymology. The species name comes from the Latin words semi, for half, and pictus, for painted, colored, as a reference to the wing pattern.

Figures

FIGURES 34 – 37. Chrysopilus semipictus sp. n., male holotype: 34 — Wing, 35 — Antenna, 36 — Maxillary palpus, female paratype: 37 — Spermatheca.

FIGURES 38 – 42. Chrysopilus semipictus sp. n., male holotype: 38 — Terminalia, dorsal view, 39 — Terminalia, dorsal view, female paratype: 40 — Terminalia, ventral view, 41 — Sternite VIII, ventral view, 42 — Genital fork (S IX).