DragonflyPix

Twinspot Tigertail (Archaeosynthemis leachii)

The Twinspot Tigertail (Archaeosynthemis leachii) is a dragonfly species of the family Synthemistidae, which contains 26 species in Australia.

The identification key to the family Synthemistidae consists of 26 couplets, 6 of which are pertinent to Archaeosynthemis leachii. 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.
 SynthemistidaeTwinspot Tigertail
(Archaeosynthemis leachii)
  • Synthemistidae: Key couplet 1 of 26

  • ○ Dark markings, if present, confined to basal parts of wings
  • b ↑
  • Synthemistidae: Key couplet 2 of 26

  • couplet drawing
  • ● Generally one crossvein in median space, sometimes two in one or two wings
  • a ↑
  • Synthemistidae: Key couplet 3 of 26

  • couplet drawing
  • ● Labrum pale to brown, without black margin or midline
  • b ↑
  • Synthemistidae: Key couplet 5 of 26

  • couplet drawingcouplet drawingcouplet drawing
  • ● Front of synthorax dark without distinct markings, or black with one or two small pale spots on each side

    ⇒ genus: Archaeosynthemis
  • a ↑
  • Synthemistidae: Key couplet 6 of 26

  • couplet drawingcouplet drawing
  • ● Pale intersegmental stripe on side of synthorax unbroken
  • b ↑
  • Synthemistidae: Key couplet 8 of 26

  • couplet drawing
  • ● Front of synthorax with an upper and lower pale spot on each side, the lower spot sometimes very small and inconspicuous

    ⇒ species: Twinspot Tigertail (Archaeosynthemis leachii)
  • a ↑
1  
  • Synthemistidae: Key couplet 1 of 26

  • ○ Wings with dark brown spots at nodus

    ⇒ species: Tasmanian Spotwing (Synthemiopsis gomphomacromioides)
a ↑
b ↓
  • ○ Dark markings, if present, confined to basal parts of wings

2  
  • Synthemistidae: Key couplet 2 of 26

  • couplet drawing
  • ● Generally one crossvein in median space, sometimes two in one or two wings
a ↑
b ↓
  • couplet drawing
  • ● Generally two to five crossveins in median space of all wings

3  
  • Synthemistidae: Key couplet 3 of 26

  • couplet drawingcouplet drawing
  • ● Labrum with black margin, often also with black stripe in midline

    ⇒ genus: Tonyosynthemis
a ↑
b ↓
  • couplet drawing
  • ● Labrum pale to brown, without black margin or midline

4  
  • Synthemistidae: Key couplet 5 of 26

  • couplet drawingcouplet drawingcouplet drawing
  • ● Front of synthorax dark without distinct markings, or black with one or two small pale spots on each side

    ⇒ genus: Archaeosynthemis
a ↑
b ↓
  • couplet drawing
  • ● Front of synthorax dark with one dominant large pale mark on each side

    ⇒ species: Turquoise Tigertail (Austrosynthemis cyanitincta)

5  
  • Synthemistidae: Key couplet 6 of 26

  • couplet drawing
  • ● Pale intersegmental stripe on side of synthorax broken near centre
a ↑
b ↓
  • couplet drawingcouplet drawing
  • ● Pale intersegmental stripe on side of synthorax unbroken

6  
  • Synthemistidae: Key couplet 8 of 26

  • couplet drawing
  • ● Front of synthorax with an upper and lower pale spot on each side, the lower spot sometimes very small and inconspicuous

    ⇒ species: Twinspot Tigertail (Archaeosynthemis leachii)
a ↑
b ↓
  • couplet drawing
  • ● Front of synthorax with small, pale spot low down on each side, and no upper spot

    ⇒ species: Spiny Tigertail (Archaeosynthemis spiniger)

Australian distribution