Sigalopella, Irwin & Winterton, 2020

Irwin, Michael E. & Winterton, Shaun L., 2020, A new stiletto fly genus from South America (Diptera: Therevidae: Agapophytinae), Zootaxa 4751 (2), pp. 276-290 : 278

Key to species of Sigalopella gen. n.

1. Femora black ( Figs 6–8 )............................................................. S. nigrofemoralis sp. n.

– Femora yellow (Fig. 1)................................................................................ 2

2. Abdomen orange basally (laterally on segments 1–2 and sometimes segment 3) ( Figs 3 –5)............ S. armeniaca sp. n.

– Abdomen uniform black (Figs 1, 12)..................................................................... 3

3. Scape narrow, much longer than head length, most macrosetae filamentous regardless of size; flagellum longer and sub-cylindrical along most of length; face distinctly bulbous and shiny (Figs 9–13)....................... S. rufifemoralis sp. n.

– Scape thicker, only slightly longer than head length, larger macrosetae shorter and more robust dorsally and laterally; flagellum shorter and more tapered; face raised but more broadly rounded (Fig. 1–2) (male unknown).......... S. ammophila sp. n.

Figures

FIGURE 3. Sigalopella armeniaca sp. n., holotype female, lateral view, (body length ca. 7.0 mm).

FIGURE 6. Sigalopella nigrofemoralis sp. n., paratype male, lateral view, (body length ca. 7.0 mm).

FIGURE 7. Sigalopella nigrofemoralis sp. n., paratype male, oblique view, (body length ca. 7.0 mm).

FIGURE 8. Sigalopella nigrofemoralis sp. n., paratype female, lateral view, (body length ca. 7.5 mm).