Oxyagrion

Costa, Janira M., De Souza, Luiz Onofre I. & Muzón, Javier, 2006, Descriptions of three new species of Odonata from Brazil, Zootaxa 1314, pp. 53-68 : 58

Key to adult male Oxyagrion lacking blue spots and with dorsum of abdominal segment ten without horns

1. Dorsum of abdominal segments 8–9 black .................................................................. 4

1’. Dorsum of abdominal segments 8–9 red ...................................................................... 5

2. Dorsum of abdominal segments 7–9 black; cerci, in lateral view equal in length to paraprocts ( Fig. 7 , 9 ) ...................................................................................... O. zielmae

2’. Dorsum of abdominal segment 7 red, segments 8–10 black; cerci, in lateral view, shorter than paraproct ( Fig. 8 , 10 ) ............................................................... O. miniopsis

3. Paraprocts shorter than 1/2 length of cerci ( Fig. 11 ); apical segment of genital ligula with long lobes on segment III ..................................................................... O. rubidum

3’. Paraprocts longer than 1/2 length of cerci ( Fig. 12 ); apical segment of genital ligula with short lobes on segment III .................................................................... O. pavidum

Figures

FIGURES 7 – 8. Abdominal segments, showing the pattern of black marks. 7, Oxyagrion zielmae, sp. nov.; 8, O xyagrion miniopsis S elys, 1876.

FIGURES 9 – 12. Abdominal segment 10 and anal appendages, lateral view. 9, Oxyagrion zielmae sp. nov.; 10, Oxyagrion miniopsis Selys, 1876; 11, Oxyagrion rubidum (Rambur, 1842); 12, Oxyagrion pavidum Hagen in Selys, 1876