Small Tigertail (Eusynthemis brevistyla)

Small Tigertail (Eusynthemis brevistyla)

Inhabits upland streams and rivers

© 2011 DECCW, NSW; 2021 Ian Endersby and DragonflyPix.com

• Synthemistidae: Key couplet 1 of 26

• ○ Dark markings, if present, confined to basal parts of wings

• Synthemistidae: Key couplet 2 of 26

• 
• ● Generally two to five crossveins in median space of all wings

• Synthemistidae: Key couplet 9 of 26

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• ● An accessory thick antenodal in forewing in addition to the two primaries; this and the two previous alternating with thin antenodals
  ○ Male tergum 10 without pale dorsal cone
  ○ Ovipositor, if developed, not reaching beyond segment 9

• Synthemistidae: Key couplet 11 of 26

• 
• ● Anterior frons pale, or pale with black stripe, often quite broad, in midline

• Synthemistidae: Key couplet 12 of 26

• 
• ○ Frons broad
  ○ Membranule of both wings well developed
  ● Female ovipositor reduced to vulvar lamina or poorly developed
  
  ⇒ genus: Eusynthemis

• Synthemistidae: Key couplet 14 of 26

• ○ Labrum black

• Synthemistidae: Key couplet 16 of 26

• 
• ● Intermediary piece at base of each wing white or pale yellow

• Synthemistidae: Key couplet 17 of 26

• 
• ● Front of synthorax dark except for pale dorsal carina

• Synthemistidae: Key couplet 18 of 26

• 
• ● Metascutum dark brown to black

• Synthemistidae: Key couplet 20 of 26

• 
• ● Top of frons black at base, continued into black midline between pair of conspicuous yellowish white anterior patches

• Synthemistidae: Key couplet 21 of 26

• 
• ● Lateral part of postclypeus black
  
  ⇒ species: Small Tigertail (Eusynthemis brevistyla)