Hemicordulia koomina

Pilbara Emerald (Hemicordulia koomina)

Inhabits streams, rivers and riverine pools

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

• Corduliidae: Key couplet 1 of 11

• 
• ● Hypertriangles generally free

• Corduliidae: Key couplet 2 of 11

• 
  
• ● Three crossveins between sectors of arculus basal to fork of Rs in hindwing
  ● Bridge crossvein at subnodus
  ● Ovipositor short, less than half length of tergum 9
  
  ⇒ genus: Hemicordulia and Procordulia

• Corduliidae: Key couplet 3 of 11

• 
• ● Top of frons yellow with dark T-mark, or black with pair of yellow spots

• Corduliidae: Key couplet 8 of 11

• 
• ● Basal half or more of abdominal tergum 7 yellow, with or without narrow, mid-dorsal black line

• Corduliidae: Key couplet 9 of 11

• 
• ● Top of frons with dark T-mark

• Corduliidae: Key couplet 10 of 11

• 
• ● Male superior appendage with strong medioventral spine
  ○ Female anal appendages approximately 2 mm long

• Corduliidae: Key couplet 11 of 11

• 
• ● Superior appendages similar in length to inferior appendage, not reflexed at tip
  ● Black distal band on abdominal tergum 7 of female occupying approximately 20% or less of mid-dorsal length of segment
  
  ⇒ species: Pilbara Emerald (Hemicordulia koomina)