Syneches pyramidatus Bezzi

Menezes, Isis Sá & Ale-Rocha, Rosaly, 2016, Revision of the Amazonian species of Syneches Walker (Diptera, Hybotidae, Hybotinae), Zootaxa 4103 (5), pp. 401-442 : 427

Syneches pyramidatus Bezzi

( Fig. 122 )

Syneches pyramidatus Bezzi, 1905: 428 ; 1909: 314 (key); Collin, 1933: 128 (citation); Smith, 1962: 213, fig. 14 (citation); 1967: 10 (catalog); Rafael & Ale-Rocha, 1995: 543, figs. 50–51, 67 (review); Yang et al., 2007: 311 (catalog); Ale-Rocha & Vieira, 2008: 120 (record).

Diagnosis. Small (about 2.7 mm length) and dark brown. Postcranium with grey pruinescence. Thorax pyramidal, dark brown to black, scutum very high and pointed, two times the height of mesopleuron, with reddish brown pruinescence; prosternum narrow. Legs dark brown, except tibiae yellow; hind femur with three elongate AV setae. Wing hyaline, pterostigma inconspicuous; apex of cell r1 narrowed.

Material examined. BRASIL. Amazonas, Manaus, R[eserva Adolpho] Ducke, 20.ix.1982, J. A. Rafael, Armadilha malaise, Syneches pyramidatus Det. Ale-Rocha, 1997 (1 ♀, INPA); idem, Rod.[ovia] 0 10, Km 26, ix.2001, J. Vidal, mata (1 ♀, INPA); idem, Igarapé Barro-Branco, 13–23.ix.2004, A. Henriques leg. (1 ♀, INPA).

Geographical distribution. Peru, Brazil (Amazonas) ( Fig. 122 ).

Comments. Some specimens with fore and mid tibiae and a median ring on hind tibia dark yellow.

This species is easily differentiated from all known species of Syneches with high pyramidal scutum by the yellow tibiae, scutum lacking gray pruinescence on the pre-scutellar disc, wing hyaline with apex of cell r1 narrowed and male terminalia with small apical projection at epandrial lamella.

Figures

FIGURE 122. Geographical distribution of S. pyramidatus, S. rafaeli, S. repletus, S. stigmaticalis and S. striatus in Amazon.