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Kimberley Longlegs (Austrocnemis obscura)

The Kimberley Longlegs (Austrocnemis obscura) is a damselfly species of the family Coenagrionidae, which contains 30 species in Australia.

The identification key to the family Coenagrionidae consists of 54 couplets, 7 of which are pertinent to Austrocnemis obscura. Click on the numbers on the right to display the corresponding couplets. Or click on the ALLin1 button to see all the relevant couplets together in a single, scrollable window.

#FamilySpeciesCouplet No.
 CoenagrionidaeKimberley Longlegs
(Austrocnemis obscura)
  • Coenagrionidae: Key couplet 1 of 54

  • ○ Damselflies without this combination of characters
  • b ↑
  • Coenagrionidae: Key couplet 14 of 54

  • couplet drawing
  • ● Anal vein leaving wing margin well basal to the level of Ac in both wings, so there is a basal segment of anal vein about the same length as Ac
  • a ↑
  • Coenagrionidae: Key couplet 15 of 54

  • ○ Hindwing shorter than 22 mm
  • b ↑
  • Coenagrionidae: Key couplet 28 of 54

  • couplet drawingcouplet drawingcouplet drawing
  • ● Central part of posterior lobe of pronotum produced into prominent tongue
  • b ↑
  • Coenagrionidae: Key couplet 32 of 54

  • ○ Small bronze damselflies, hindwing shorter than 14 mm

    ⇒ genus: Austrocnemis
  • b ↑
  • Coenagrionidae: Key couplet 33 of 54

  • couplet drawingcouplet drawing
    couplet drawingcouplet drawing
  • ● Abdominal segment 9 bronze-black above, with or without small blue spot
  • b ↑
  • Coenagrionidae: Key couplet 34 of 54

  • couplet drawingcouplet drawing
  • ● Pale blue stripe extending diagonally across lower metanepisternum of male, on to metepimeron
    ● Posterior lobe of female pronotum a concave, inverted subtriangular flap

    ⇒ species: Kimberley Longlegs (Austrocnemis obscura)
  • b ↑
1  
  • Coenagrionidae: Key couplet 1 of 54

  • couplet drawing
  • ● Arculus in hindwing situated beyond distal antenodal crossvein by at least the length of subcostal part of antenodal
    ○ Very small damselflies, hindwing shorter than 14 mm

    ⇒ genus: Agriocnemis
a ↑
b ↓
  • ○ Damselflies without this combination of characters

2  
  • Coenagrionidae: Key couplet 14 of 54

  • couplet drawing
  • ● Anal vein leaving wing margin well basal to the level of Ac in both wings, so there is a basal segment of anal vein about the same length as Ac
a ↑
b ↓
  • couplet drawing
  • ● 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

3  
  • Coenagrionidae: Key couplet 15 of 54

  • ○ Hindwing longer than 22 mm
a ↑
b ↓
  • ○ Hindwing shorter than 22 mm

4 Female only
  • Coenagrionidae: Key couplet 28 of 54

  • couplet drawingcouplet drawingcouplet drawing
  • ● Central part of posterior lobe of pronotum low, rounded, not produced into prominent tongue
a ↑
b ↓
  • couplet drawingcouplet drawingcouplet drawing
  • ● Central part of posterior lobe of pronotum produced into prominent tongue

5  
  • Coenagrionidae: Key couplet 32 of 54

  • ○ Reddish to black damselflies, hindwing longer than 14 mm

    ⇒ species: Red-Tipped Shadefly (Argiocnemis rubescens)
a ↑
b ↓
  • ○ Small bronze damselflies, hindwing shorter than 14 mm

    ⇒ genus: Austrocnemis

6  
  • Coenagrionidae: Key couplet 33 of 54

  • couplet drawingcouplet drawing
  • ● Abdominal segment 9 substantially or entirely blue above

    ⇒ species: Splendid Longlegs (Austrocnemis splendida)
a ↑
b ↓
  • couplet drawingcouplet drawing
    couplet drawingcouplet drawing
  • ● Abdominal segment 9 bronze-black above, with or without small blue spot

7  
  • Coenagrionidae: Key couplet 34 of 54

  • couplet drawingcouplet drawing
  • ● Male metanepisternum black, often covered by pruinescence
    ● Posterior lobe of female pronotum an upright, rounded flap

    ⇒ species: Tiny Longlegs (Austrocnemis maccullochi)
a ↑
b ↓
  • couplet drawingcouplet drawing
  • ● Pale blue stripe extending diagonally across lower metanepisternum of male, on to metepimeron
    ● Posterior lobe of female pronotum a concave, inverted subtriangular flap

    ⇒ species: Kimberley Longlegs (Austrocnemis obscura)

Australian distribution