Amplisegmentum, Webb, 2005

Winterton, Shaun L., 2021, A new species of Amplisegmentum Webb (Diptera: Therevidae) from Venezuela, Zootaxa 4927 (4), pp. 576-582 : 577

Key to species of Amplisegmentum

1. Parafacial setae present; male frons width at narrowest point equal to width of anterior ocellus; dorsocentral setae present; wing uniformly hyaline ( Figs 5 , 6 ).......................................................... A. ecuadorensis Webb.

- Parafacial setae absent; male frons width at narrowest point slightly wider than ocellar tubercle; dorsocentral setae absent; wing hyaline with dark infuscation at apices of basal-medial and discal cells ( Figs 1–4 )................. A. venezuelensis sp. n.

Figures

FIGURE 1. Amplisegmentum venezuelensis sp. n., male holotype, dorsolateral view. Body length: 7.2 mm.

FIGURE 2. Amplisegmentum venezuelensis sp. n., male holotype head.

FIGURE 3. Amplisegmentum venezuelensis sp. n., male genitalia, ventral view.

FIGURE 4. Amplisegmentum venezuelensis sp. n., male genitalia.A. epandrium; B. gonocoxites, ventral view; C. same, lateral view; D. phallus, lateral view; E. same, dorsal view. Scale line: 0.2 mm. Abbreviations: d, distiphallus; da, dorsal apodeme of parameral sheath; ea, ejaculatory apodeme; gs, gonostylus; igp, inner gonocoxal process; vl, ventral lobe.

FIGURE 5. Amplisegmentum ecuadorensis Webb, 2005b, male holotype, lateral view. Body length: 7.3 mm (Photo: Canadian National Insect Collection).

FIGURE 6. Amplisegmentum ecuadorensis Webb, 2005b, male holotype, anterior view (Photo: Canadian National Insect Collection).