● Distal antenodal of forewing complete, both costal and subcostal sections present
a ↑
Libellulidae: Key couplet 2 of 67
● Anal loop present
b ↑
Libellulidae: Key couplet 9 of 67
● Anal loop well developed, generally stocking-shaped, usually closed at tip
b ↑
Libellulidae: Key couplet 14 of 67
○ Not as above
b ↑
Libellulidae: Key couplet 15 of 67
● Base of hindwing triangle just beyond to well beyond arculus ○ Top of frons brilliant metallic blue or green, particularly in male
a ↑
Libellulidae: Key couplet 16 of 67
○ More than nine antenodals in forewing
b ↑
Libellulidae: Key couplet 18 of 67
● Arculus almost equidistant from second and third antenodal crossvein ● Nodus closer to base of wing than to apex, the ratio between the distances approximately 4:5 ● Male abdomen slender, almost parallel-sided
⇒ genus: Agrionoptera
a ↑
Libellulidae: Key couplet 19 of 67
○ Abdomen substantially brownish black ● Forewing triangle with crossvein