Syneches longiflagellatus Ale-Rocha & Vieira

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: 41-42

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Syneches longiflagellatus Ale-Rocha & Vieira


Syneches longiflagellatus Ale-Rocha & Vieira  

( Figs 27A–F View FIGURE 27 , 57 View FIGURE 57 )

Syneches longiflagellatus Ale-Rocha & Vieira, 2008: 117   , figs 15–21, 38; Menezes & Ale-Rocha, 2016: 420 View Cited Treatment , fig. 120 (key, distr.). Type locality: Parque Nacional do Jaú, Amazonas, Brazil.

Diagnosis. Medium size (3.6 mm) ( Fig. 27A View FIGURE 27 ). Antenna yellow, except postpedicel brown; postpedicel elongated, about 3 x longer than scape and pedicel combined, covered with dense pubescence ( Fig. 27B View FIGURE 27 ). Prosternum fused to proepisternum. Scutum rounded, lower than mesopleuron in lateral view, yellow to pale brown, with a quadrangular dark brown spot on anterior third ( Figs 27C, D View FIGURE 27 ). Legs yellow and slender ( Figs 27A, E View FIGURE 27 ). Wing sub-hyaline; pterostigma pale brown, short, round, placed distal to apex of R 1 ( Fig. 27F View FIGURE 27 ). Abdomen weakly sclerotized ( Fig. 27A View FIGURE 27 ).

Type material examined. HOLOTYPE ♂ ( INPA) labelled: “ BRASIL, Amazonas , Parque Nacional do Jaú, 8–16.iv.2001, 01°53′04″S 61°35′11″W ” “Arm [armadilha] Susp [suspensa] 20m, Floresta, Henriques & Vidal” “Holótipo, Syneches longiflagellatus Ale-Rocha & Vieira   ” [red label] GoogleMaps   . Holotype condition: good; not dissected.

Additional material examined. BRAZIL. Roraima: Xitei (Xidea), 02°36′24″N 63°52′17″W, 20.ix.1995, L.S. Aquino, Arm. Malaise (1 ♀, INPA) GoogleMaps   . Amazonas: Manaus, Res. Ducke, Igarapé Barro Branco , Arm. Suspensa 20 m, 06–16.xii.2004, Henriques, A. Leg. (1♂, INPA)   ; Ipixuna, Rio Liberdade, Estirão da Preta , 07º21′46.7″S 71º52′07.1″W, 11–15.v.2011, Arm. Malaise, J.A. Rafael, J.T. Câmara, R.F. Silva, A. Somavilla, C. Gonçalves, leg. (1 ♂, INPA) GoogleMaps   .

Distribution. Brazil (Amazonas and Roraima *) ( Fig. 57 View FIGURE 57 ).

Variation. The female from Roraima has the base of the postpedicel yellow and the scutum pale brown, slightly darker than on the holotype.

Remarks. This unusual species is probably the most autapomorphic in the genus, by the following set of characters: postpedicel very long, about 3 x longer than preceding segments combined (the longest for the genus up-to-date), prosternum fused to proepisternum, abdomen weakly sclerotized and epandrial lamella with 1 long dorsoapical projection, about half-length of lamella ( Ale-Rocha & Vieira 2008, fig. 17). The prosternum is fused to the proepisternum forming a precoxal bridge that does not seem to be homologous to that of the other Brazilian species of Syneches   : S. catarinae   , S. curvipes   , S. rafaeli   and S. walkeri   because in these latter species, the prosternum has a wide connection with the proepisternum ( Fig. 2C View FIGURE 2 ), while in S. longiflagellatus   these sclerites are connected by a narrow region.


Instituto Nacional de Pesquisas da Amazonia














Syneches longiflagellatus Ale-Rocha & Vieira

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

Syneches longiflagellatus

Menezes, I. S. & Ale-Rocha, R. 2016: 420
Ale-Rocha, R. & Vieira, R. M. 2008: 117