Syneches exilis Menezes & Ale-Rocha

Soares, Matheus M. M., Freitas-Silva, Rafael A. P. & Ale-Rocha, Rosaly, 2021, Review of Brazilian species of Syneches Walker (Diptera, Hybotidae, Hybotinae), with description of ten new species, Zootaxa 5049 (1), pp. 1-84: 31

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Syneches exilis Menezes & Ale-Rocha


Syneches exilis Menezes & Ale-Rocha  

( Figs 18A–E View FIGURE 18 , 50 View FIGURE 50 )

Syneches exilis Menezes & Ale-Rocha, 2016: 417–419   View Cited Treatment , figs 47–53, 109, 119. Type locality: Cerro de La Neblina , Amazonas, Venezuela.

Diagnosis. Medium size (4.0 mm) ( Fig. 18A View FIGURE 18 ). Antenna and palpus brown ( Fig. 18C View FIGURE 18 ). Scutum rounded, slightly narrower than mesopleuron in lateral view ( Fig. 18B View FIGURE 18 ); scutellum with 1 subapical and 3 lateral pairs of bristles, lacking apical bristles. Legs long and slender; mostly yellow, but basal half of fore tibia, fore and mid tarsomeres 3–5, hind femur, hind tibia and all hind tarsomeres brown ( Figs 18A, D View FIGURE 18 ); mid tibia with 1D and 3AD long bristles, longer than mid tarsomere 1. Wing sub-hyaline, pale brown; pterostigma brown, long and oval, 6 x longer than wide, extending from apex of R 1 to near apex of R 2+3; second section of M 1 as long as crossvein r-m; cell bm slightly longer than cells br and cua ( Fig. 18E View FIGURE 18 )

Type material examined. HOLOTYPE ♂ ( NMNH) labelled: “ VENEZUELA: T.P.A. Basecamp, 0°51′N – 66°10′W, Cerro da Neblina , 140 m, 20–24.iii.1984, O. Flint & J. Louton, Malaise trap over small stream at east side of basecamp” “Holótipo, Syneches exilis, Menezes & Ale-Rocha   ” [red label] GoogleMaps   . Holotype condition: good; abdomen with terminalia dissected, stored in microvial with glycerin.

Distribution. Brazil (Amazonas) ( Fig. 50 View FIGURE 50 ); Venezuela. Syneches exilis   is known to occur only from the Amazon biome.

Remarks. Syneches exilis   is remarkably similar to S. plaumanni   sp. nov. by the following set of characters: legs long and slender, wing pale brown, pterostigma long and oval. However, S. exilis   differs from it by the scutellum lacking apical bristles (present in S. plaumanni   sp. nov.), mid tibia bearing long bristles, as long as mid tarsomere 1 (shorter than mid tarsomere 1 in S. plaumanni   sp. nov.) and distal margin of hypandrium slightly convex (hypandrium bears a mid-width wide subapical protuberance in S. plaumanni   sp. nov.).


Smithsonian Institution, National Museum of Natural History














Syneches exilis Menezes & Ale-Rocha

Soares, Matheus M. M., Freitas-Silva, Rafael A. P. & Ale-Rocha, Rosaly 2021

Syneches exilis Menezes & Ale-Rocha, 2016: 417–419

Menezes, I. S. & Ale-Rocha, R. 2016: 419