Red & Blue Damsel (Xanthagrion erythroneurum)

Red & Blue Damsel (Xanthagrion erythroneurum)

Inhabits slow sections of mostly wider streams and still waters

© 2011 DECCW, NSW; 2021 Ian Endersby and DragonflyPix.com

• Coenagrionidae: Key couplet 1 of 54

• ○ Damselflies without this combination of characters

• Coenagrionidae: Key couplet 14 of 54

• 
• ● Anal vein leaving wing margin nearer to or beyond level of Ac
  ● Basal segment of hindwing anal vein, if present, not more than half length of Ac

• Coenagrionidae: Key couplet 35 of 54

• ○ Damselflies with dark brown or black markings on pale background (reddish, yellow, green, blue, pale brown), or substantially dark, the dark areas in either case often with metallic sheen

• Coenagrionidae: Key couplet 37 of 54

• 
• ● Pterostigma of forewing similar in size to that of hindwing
  ● Female lacking ventral spine on abdominal segment 8

• Coenagrionidae: Key couplet 38 of 54

• 
• ● Pterostigma markedly longer than wide

• Coenagrionidae: Key couplet 40 of 54

• ○ Extensive dull orange to red markings on head, thorax and anterior abdomen
  
  ⇒ species: Red & Blue Damsel (Xanthagrion erythroneurum)

• Coenagrionidae: Key couplet 48 of 54

• 
• ● Posterior lobe of pronotum without forwardly directed, finger-like process on each side

• Coenagrionidae: Key couplet 50 of 54

• 
• ○ Upper surface of abdominal segment 1 brown to black, with or without orange-brown dorsal and lateral marks
  ● Anal vein leaving wing margin at Ac

• Coenagrionidae: Key couplet 51 of 54

• ○ Synthoracic terga, between wing bases, pale orange
  ○ Abdominal tergum 1 with triangular bronze dorsal mark partly divided by anterior, orange mid-dorsal line
  
  ⇒ species: Red & Blue Damsel (Xanthagrion erythroneurum)