DragonflyPix

Azure Flatwing (Austroargiolestes elke)

The Azure Flatwing (Austroargiolestes elke) is a damselfly species of the family Megapodagrionidae, which contains 22 species in Australia.

The identification key to the family Megapodagrionidae consists of 31 couplets, 11 of which are pertinent to Austroargiolestes elke. 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.
 MegapodagrionidaeAzure Flatwing
(Austroargiolestes elke)
  • Megapodagrionidae: Key couplet 1 of 31

  • couplet drawing
  • ○ Smaller, with abdomen shorter than 42 mm, hindwings shorter than 35 mm
    ● Fewer than 27 postnodals
  • b ↑
  • Megapodagrionidae: Key couplet 2 of 31

  • couplet drawingcouplet drawing
  • ● Generally three or more cells, rarely two in discoidal field between discoidal cell and level of subnodus
    ● Male superior anal appendages with ventral spur

    ⇒ genus: Austroargiolestes
  • a ↑
  • Megapodagrionidae: Key couplet 3 of 31

  • couplet drawing
  • ● Anterior frons, clypeus and labrum dark greenish brown to black
  • b ↑
  • Megapodagrionidae: Key couplet 6 of 31

  • couplet drawing
    couplet drawingcouplet drawing
  • ● Median part to much of front of synthorax dark brown to black with pale to yellowish brown humeral stripe on each side, sometimes pruinescent
  • b ↑
  • Megapodagrionidae: Key couplet 7 of 31

  • couplet drawing
  • ● Humeral stripe not widened at upper end
  • b ↑
  • Megapodagrionidae: Key couplet 9 of 31

  • couplet drawingcouplet drawing
  • ● Superior anal appendages with tip of ventral spur visible from above
  • a ↑
  • Megapodagrionidae: Key couplet 10 of 31

  • couplet drawing
  • ● Distal end of inner marginal ridge of superior appendages rounded, or continuing into inner ridge of ventral spur
  • b ↑
  • Megapodagrionidae: Key couplet 11 of 31

  • couplet drawingcouplet drawing
  • ● Outer face of mandible very dark brown to black
    ● Superior anal appendages with basal portion about as long as median or distal portion

    ⇒ species: Azure Flatwing (Austroargiolestes elke)
  • a ↑
  • Megapodagrionidae: Key couplet 14 of 31

  • couplet drawing
    couplet drawingcouplet drawing
  • ● Median part to much of front of synthorax dark brown to black, with pale to red-brown humeral stripe on each side, sometimes pruinescent
  • b ↑
  • Megapodagrionidae: Key couplet 15 of 31

  • couplet drawing
  • ● Pale stripe in front of mesopleural suture constricted near upper end, then broadened at tip, not obscured by pruinescence
  • a ↑
  • Megapodagrionidae: Key couplet 17 of 31

  • couplet drawing
  • ● Outer face of mandible very dark brown to black

    ⇒ species: Azure Flatwing (Austroargiolestes elke)
  • a ↑
1  
  • Megapodagrionidae: Key couplet 1 of 31

  • couplet drawing
  • ○ Large, with abdomen longer than 42 mm
    ○ hindwings longer than 40 mm
    ● More than 27 postnodals

    ⇒ species: Treehole Flatwing (Podopteryx selysi)
a ↑
b ↓
  • couplet drawing
  • ○ Smaller, with abdomen shorter than 42 mm, hindwings shorter than 35 mm
    ● Fewer than 27 postnodals

2  
  • Megapodagrionidae: Key couplet 2 of 31

  • couplet drawingcouplet drawing
  • ● Generally three or more cells, rarely two in discoidal field between discoidal cell and level of subnodus
    ● Male superior anal appendages with ventral spur

    ⇒ genus: Austroargiolestes
a ↑
b ↓
  • couplet drawingcouplet drawing
  • ● Generally two, sometimes three, cells in discoidal field between discoidal cell and level of subnodus
    ● Male superior anal appendage without ventral spur

3  
  • Megapodagrionidae: Key couplet 3 of 31

  • couplet drawing
  • ● Anterior frons and postclypeus largely pale, yellowish or reddish orange
a ↑
b ↓
  • couplet drawing
  • ● Anterior frons, clypeus and labrum dark greenish brown to black

4 Male only
  • Megapodagrionidae: Key couplet 6 of 31

  • couplet drawing
  • ● Front of synthorax almost completely pale, yellow to orange, not pruinescent

    ⇒ species: Golden Flatwing (Austroargiolestes chrysoides)
a ↑
b ↓
  • couplet drawing
    couplet drawingcouplet drawing
  • ● Median part to much of front of synthorax dark brown to black with pale to yellowish brown humeral stripe on each side, sometimes pruinescent

5 Male only
  • Megapodagrionidae: Key couplet 7 of 31

  • couplet drawing
  • ● Humeral stripe constricted near upper end, then broadened at tip
a ↑
b ↓
  • couplet drawing
  • ● Humeral stripe not widened at upper end

6 Male only
  • Megapodagrionidae: Key couplet 9 of 31

  • couplet drawingcouplet drawing
  • ● Superior anal appendages with tip of ventral spur visible from above
a ↑
b ↓
  • couplet drawing
  • ● Superior anal appendages with ventral spur not visible from above

7 Male only
  • Megapodagrionidae: Key couplet 10 of 31

  • couplet drawing
  • ● Distal end of inner marginal ridge of superior appendages ending in sharp point above ventral spur

    ⇒ species: Powdered Flatwing (Austroargiolestes calcaris) (some)
a ↑
b ↓
  • couplet drawing
  • ● Distal end of inner marginal ridge of superior appendages rounded, or continuing into inner ridge of ventral spur

8 Male only
  • Megapodagrionidae: Key couplet 11 of 31

  • couplet drawingcouplet drawing
  • ● Outer face of mandible very dark brown to black
    ● Superior anal appendages with basal portion about as long as median or distal portion

    ⇒ species: Azure Flatwing (Austroargiolestes elke)
a ↑
b ↓
  • couplet drawingcouplet drawing
  • ● Outer face of mandible largely yellowish white to yellow
    ● Superior anal appendages with basal portion markedly shorter than median or distal portion

    ⇒ species: Sydney Flatwing (Austroargiolestes isabellae)

9 Female only
  • Megapodagrionidae: Key couplet 14 of 31

  • couplet drawing
  • ● Front of synthorax almost completely pale yellow to white

    ⇒ species: Golden Flatwing (Austroargiolestes chrysoides) (possibly teneral specimens)
a ↑
b ↓
  • couplet drawing
    couplet drawingcouplet drawing
  • ● Median part to much of front of synthorax dark brown to black, with pale to red-brown humeral stripe on each side, sometimes pruinescent

10 Female only
  • Megapodagrionidae: Key couplet 15 of 31

  • couplet drawing
  • ● Pale stripe in front of mesopleural suture constricted near upper end, then broadened at tip, not obscured by pruinescence
a ↑
b ↓
  • couplet drawingcouplet drawing
  • ● Pale stripe in front of mesopleural suture not widened at tip, its inner margin commonly converging on mesopleural suture, sometimes obscured by pruinescence

11 Female only
  • Megapodagrionidae: Key couplet 17 of 31

  • couplet drawing
  • ● Outer face of mandible very dark brown to black

    ⇒ species: Azure Flatwing (Austroargiolestes elke)
a ↑
b ↓
  • couplet drawing
  • ● Outer face of mandible largely pale

Australian distribution