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Colourful Bluetail (Ischnura pruinescens)

The Colourful Bluetail (Ischnura pruinescens) 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, 6 of which are pertinent to Ischnura pruinescens. 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.
 CoenagrionidaeColourful Bluetail
(Ischnura pruinescens)
  • 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 low, rounded, not produced into prominent tongue
  • a ↑
  • Coenagrionidae: Key couplet 29 of 54

  • couplet drawing
  • ○ Abdominal segment 3-5 of male either dark brown to black or orange-red above
    ● Female with ventral spine on apex of abdominal segment 8

    ⇒ genus: Ischnura
  • b ↑
  • Coenagrionidae: Key couplet 30 of 54

  • couplet drawing
  • ● No pale markings on rear of head, behind eyes, although postocular area is usually pruinose in males

    ⇒ species: Colourful Bluetail (Ischnura pruinescens)
  • a ↑
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 29 of 54

  • couplet drawing
    couplet drawing
  • ● Abdominal segment 3-5 of male extensively blue above, with black tips
    ● Female lacking ventral spine on apex of abdominal segment 8

    ⇒ species: Swamp Bluet (Coenagrion lyelli) (part)
a ↑
b ↓
  • couplet drawing
  • ○ Abdominal segment 3-5 of male either dark brown to black or orange-red above
    ● Female with ventral spine on apex of abdominal segment 8

    ⇒ genus: Ischnura

6  
  • Coenagrionidae: Key couplet 30 of 54

  • couplet drawing
  • ● No pale markings on rear of head, behind eyes, although postocular area is usually pruinose in males

    ⇒ species: Colourful Bluetail (Ischnura pruinescens)
a ↑
b ↓
  • couplet drawingcouplet drawing
  • ● Postocular spots present

Australian distribution