Tachytrechus analis (Parent)

Brooks, Scott E. & Cumming, Jeffrey M., 2008, The Tachytrechus alatus species group (= Syntomoneurum Becker) revisited: new species and revised species group limits (Diptera: Dolichopodidae), Zootaxa 1676, pp. 1-27 : 5-7

Tachytrechus analis (Parent)

(Figs. 2, 13)

Syntomoneurum anale Parent 1954: 226 .

Syntormoneurum anale , misspelling by Parent 1954: 226. Tachytrechus analis (Parent) : Brooks (2005): 121.

Diagnosis. Male. Body length 5.7 mm, wing length 5.8 mm; face mainly metallic green with brownish background coloration; clypeus rounded below; 2 notopleural bristles; fore tarsus with weak silvery reflections anteriorly, basitarsus and tarsomere 2 with curved setae ventrally; hind femur mainly yellow with 1 anterior preapical bristle; wing (Fig. 2A) lacking costal swelling; R2+3 ending at costa well beyond midpoint of wing; bends in M distinct, obtuse; R4+5 and M subparallel distally; abdominal tergite 5 with large posterior membranous region, extended laterally as broad band to ventral margin of sclerite; hypopygium (Figs. 2B, 2C): right and left basiventral epandrial lobe very weakly developed; apicoventral epandrial lobe extremely well-developed, long, digitiform, projected ventrally, with medial seta positioned near base, lateral seta near middle; accessory epandrial process absent; apicoventral arm of postgonite with medial process present, apex with hook-like process; cercus subrectangular in dorsal view, longer than wide, apical and lateral margin dark; hypandrium wide, asymmetrical in ventral view, right margin with dentiform projection; ventral surstylar lobe with series of parallel diagonal ridges on ventral surface; phallus with weak projection near middle and elongate, digitiform projection subapically.

FIGURE 1. Tachytrechus alatus (Becker) : (A) male wing; (B) female wing; (C) hypandrium (ventral view); (D) hypopygium (left lateral view). Adapted from Brooks & Wheeler (2002). Abbreviations: A1: anal vein; acc proc: accessory epandrial process; apv lobe: apicoventral epandrial lobe; bv lobe: basiventral epandrial lobe; cerc: cercus; CuA1: 1st anterior branch of cubital vein; dm-cu: discal medial-cubital crossvein; epand: epandrium; hypd: hypandrium; M: medial vein; pgt: postgonite; ph: phallus; R1: 1st radial vein; R2+3: 2nd + 3rd radial vein; R4+5: 4th + 5th radial vein; vsur: ventral lobe of surstylus.

FIGURE 2. Tachytrechus analis male (Parent): (A) wing; (B) hypandrium (ventral view); (C) hypopygium (left lateral view). Adapted from Brooks & Wheeler (2002). Abbreviations: A1: anal vein; apv lobe: apicoventral epandrial lobe; bv lobe: basiventral epandrial lobe; cerc: cercus; CuA1: 1st anterior branch of cubital vein; dm-cu: discal medial-cubital crossvein; hypd: hypandrium; M: medial vein; ph: phallus; R1: 1st radial vein; R2+3: 2nd + 3rd radial vein; R4+5: 4th + 5th radial vein; vsur: ventral lobe of surstylus.

Female: Unknown.

Type material examined. Holotype ɗ, COLOMBIA: Boyaca, Muzo, 900 m, 1936, J. Bequaert ( MNHN). Distribution. Tachytrechus analis is known only from the type locality in Muzo, Colombia ( Fig. 13 ).

Figures

FIGURE 13. Known distribution of Tachytrechus alatus (Becker), T. analis (Parent), T. dios Brooks sp. nov., T. giganteus (Brooks) and T. peruicus Yang & Zhang.