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Silver Wisp (Agriocnemis argentea)

The Silver Wisp (Agriocnemis argentea) 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, 11 of which are pertinent to Agriocnemis argentea. 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.
 CoenagrionidaeSilver Wisp
(Agriocnemis argentea)
  • 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 ↑
  • Coenagrionidae: Key couplet 3 of 54

  • couplet drawingcouplet drawing
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  • ● Inferior anal appendages almost the same length as, or shorter than, superiors
  • b ↑
  • Coenagrionidae: Key couplet 4 of 54

  • couplet drawingcouplet drawing
  • ● Tips of superior appendages not converging
  • b ↑
  • Coenagrionidae: Key couplet 6 of 54

  • couplet drawing
  • ● Small black spot at upper end of metapleural suture
  • b ↑
  • Coenagrionidae: Key couplet 7 of 54

  • couplet drawing
  • ● Upper surface of superior appendage ending in short, stout tooth
    ○ Mature males covered in white pruinescence

    ⇒ species: Silver Wisp (Agriocnemis argentea)
  • a ↑
  • Coenagrionidae: Key couplet 8 of 54

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  • ● Posterior lobe of pronotum well developed
  • b ↑
  • Coenagrionidae: Key couplet 9 of 54

  • couplet drawing
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  • ● Central part of posterior lobe of pronotum, if differentiated from rest, a single, upright flap, or depressed
  • b ↑
  • Coenagrionidae: Key couplet 10 of 54

  • couplet drawingcouplet drawingcouplet drawing
  • ● Central part of superior lobe of pronotum, if differentiated, a simple or trilobed flap, usually highest in midline
  • b ↑
  • Coenagrionidae: Key couplet 12 of 54

  • couplet drawing
  • ● Margins of central and lateral portions of posterior lobe of pronotum discontinuous, central portion ending behind lateral portion
    ○ From north-western Australia

    ⇒ species: Silver Wisp (Agriocnemis argentea)
  • a ↑
  • Coenagrionidae: Key couplet 12 of 54

  • couplet drawingcouplet drawing
  • ● Margins of central and lateral portions of posterior lobe of pronotum continuous
    ○ From eastern and northern Australia
  • b ↑
  • Coenagrionidae: Key couplet 13 of 54

  • couplet drawing
  • ● Central portion of posterior lobe scarcely differentiated from lateral portions

    ⇒ species: Silver Wisp (Agriocnemis argentea)
  • 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 Male only
  • Coenagrionidae: Key couplet 3 of 54

  • couplet drawing
  • ● Inferior anal appendages much longer than superiors

    ⇒ species: Pinhead Wisp (Agriocnemis femina)
a ↑
b ↓
  • couplet drawingcouplet drawing
    couplet drawingcouplet drawing
    couplet drawingcouplet drawing
    couplet drawingcouplet drawing
  • ● Inferior anal appendages almost the same length as, or shorter than, superiors

3 Male only
  • Coenagrionidae: Key couplet 4 of 54

  • couplet drawingcouplet drawing
  • ● Tips of superior appendages converging
a ↑
b ↓
  • couplet drawingcouplet drawing
  • ● Tips of superior appendages not converging

4 Male only
  • Coenagrionidae: Key couplet 6 of 54

  • couplet drawing
  • ● Black line present along upper half or more of metapleural suture

    ⇒ species: Pilbara Wisp (Agriocnemis kunjina)
a ↑
b ↓
  • couplet drawing
  • ● Small black spot at upper end of metapleural suture

5 Male only
  • Coenagrionidae: Key couplet 7 of 54

  • couplet drawing
  • ● Upper surface of superior appendage ending in short, stout tooth
    ○ Mature males covered in white pruinescence

    ⇒ species: Silver Wisp (Agriocnemis argentea)
a ↑
b ↓
  • couplet drawing
  • ● Upper surface of superior appendage uniformly curved
    ○ Mature males not heavily pruinose

    ⇒ species: Pygmy Wisp (Agriocnemis pygmaea)

6 Female only
  • Coenagrionidae: Key couplet 8 of 54

  • couplet drawing
  • ● Posterior lobe of pronotum reduced to low rim

    ⇒ species: Pygmy Wisp (Agriocnemis pygmaea)
a ↑
b ↓
  • couplet drawingcouplet drawingcouplet drawing
  • ● Posterior lobe of pronotum well developed

7 Female only
  • Coenagrionidae: Key couplet 9 of 54

  • couplet drawing
  • ● Central part of posterior lobe of pronotum a broad, posterior flap, depressed in midline with, in front of it, a narrower, upright lobe

    ⇒ species: Tropical Wisp (Agriocnemis dobsoni)
a ↑
b ↓
  • couplet drawing
    couplet drawingcouplet drawing
    couplet drawingcouplet drawing
  • ● Central part of posterior lobe of pronotum, if differentiated from rest, a single, upright flap, or depressed

8 Female only
  • Coenagrionidae: Key couplet 10 of 54

  • couplet drawingcouplet drawing
  • ● Posterior lobe of pronotum upright, shallowly to deeply depressed in midline
a ↑
b ↓
  • couplet drawingcouplet drawingcouplet drawing
  • ● Central part of superior lobe of pronotum, if differentiated, a simple or trilobed flap, usually highest in midline

9 Female only (part)
  • Coenagrionidae: Key couplet 12 of 54

  • couplet drawing
  • ● Margins of central and lateral portions of posterior lobe of pronotum discontinuous, central portion ending behind lateral portion
    ○ From north-western Australia

    ⇒ species: Silver Wisp (Agriocnemis argentea)
a ↑
b ↓
  • couplet drawingcouplet drawing
  • ● Margins of central and lateral portions of posterior lobe of pronotum continuous
    ○ From eastern and northern Australia

10 Female only
  • Coenagrionidae: Key couplet 12 of 54

  • couplet drawing
  • ● Margins of central and lateral portions of posterior lobe of pronotum discontinuous, central portion ending behind lateral portion
    ○ From north-western Australia

    ⇒ species: Silver Wisp (Agriocnemis argentea)
a ↑
b ↓
  • couplet drawingcouplet drawing
  • ● Margins of central and lateral portions of posterior lobe of pronotum continuous
    ○ From eastern and northern Australia

11 Female only
  • Coenagrionidae: Key couplet 13 of 54

  • couplet drawing
  • ● Central portion of posterior lobe of pronotum an upright, trilobed flap

    ⇒ species: Red-Rumped Wisp (Agriocnemis rubricauda)
a ↑
b ↓
  • couplet drawing
  • ● Central portion of posterior lobe scarcely differentiated from lateral portions

    ⇒ species: Silver Wisp (Agriocnemis argentea)

Australian distribution