Phoenicagrion

Machado, Angelo B. M., 2010, Four new species of Phoenicagrion von Ellenrieder, 2008 from Brazil (Odonata, Coenagrionidae), Zootaxa 2517, pp. 44-52 : 45

Key to males of Phoenicagrion

1. Hind prothoracic lobe very large, subrectangular ( Figs 6, 8, 10 ) ................................................................................. 2

1`. Hind prothoracic lobe not large, rounded ( Figs 1, 3, 5 )................................................................................................ 4

2. Hind prothoracic lobe with an acute lobe at its postero-lateral corner ( Fig. 6 ) ............................................ P. paulsoni

2´. Hind prothoracic lobe with no acute lobe at its postero-lateral corner, this area forming an angle ( Fig. 8 ) or rounded ( Fig. 10 ) ........................................................................................................................................................................ 3

3. Postero-lateral corner of hind prothoracic lobe sharply angled, width of base of hind prothoracic lobe narrower than width of median lobe ( Fig. 8 ). Penis with well-defined lateral lobes (Fig. 22). ............................................... P. k a r a j a

3´. Postero-lateral corner of hind prothoracic lobe rounded, width of base of hind prothoracic lobe subequal to the width of median lobe ( Fig. 10 ). Penis without well-defined lateral lobes (Fig. 23) ............................................ P. megalobos

4. Cercus in lateral view with a dilation just anterior to the ventral tooth ( Figs 12, 13 ) Wings flavescent or hyaline..... 5

4´. Cercus in lateral view with no dilation anterior of the ventral tooth ( Fig. 14 ). Wings hyaline ......................... P. i b s e n i

5. Frons rounded, wings flavescent ................................................................................................................ P. flavescens

5´. Frons angled, wings hyaline ...................................................................................................................... P. flammeum

Figures

FIGURES 1 – 11. Hind lobe of prothorax in dorsal view.

FIGURES 12 – 17. Anal appendages in dorsal and lateral views.