DragonflyPix

Bicoloured Skimmer (Notolibellula bicolor)

The Bicoloured Skimmer (Notolibellula bicolor) is a dragonfly species of the family Libellulidae, which contains 56 species in Australia.

The identification key to the family Libellulidae consists of 67 couplets, 7 of which are pertinent to Notolibellula bicolor. 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.
 LibellulidaeBicoloured Skimmer
(Notolibellula bicolor)
  • Libellulidae: Key couplet 1 of 67

  • couplet drawing
  • ● Distal antenodal of forewing complete, both costal and subcostal sections present
  • a ↑
  • Libellulidae: Key couplet 2 of 67

  • couplet drawingcouplet drawing
  • ● Anal loop present
  • b ↑
  • Libellulidae: Key couplet 9 of 67

  • couplet drawing
  • ● Anal loop well developed, generally stocking-shaped, usually closed at tip
  • b ↑
  • Libellulidae: Key couplet 14 of 67

  • ○ Not as above
  • b ↑
  • Libellulidae: Key couplet 15 of 67

  • couplet drawing
  • ● Base of hindwing triangle just beyond to well beyond arculus
    ○ Top of frons brilliant metallic blue or green, particularly in male
  • a ↑
  • Libellulidae: Key couplet 16 of 67

  • ○ More than nine antenodals in forewing
  • b ↑
  • Libellulidae: Key couplet 18 of 67

  • couplet drawing
    couplet drawing
    couplet drawing
  • ● Arculus in line or almost in line with second antenodal crossvein, or close to it
    ● Nodus almost equidistant from base and apex of wing
    ● Male abdomen broad, tapering from segment 3-10

    ⇒ species: Bicoloured Skimmer (Notolibellula bicolor)
  • b ↑
1  
  • Libellulidae: Key couplet 1 of 67

  • couplet drawing
  • ● Distal antenodal of forewing complete, both costal and subcostal sections present
a ↑
b ↓
  • couplet drawing
  • ● Distal antenodal of forewing incomplete, only the costal section present

2  
  • Libellulidae: Key couplet 2 of 67

  • couplet drawing
  • ● Hindwing lacking anal loop

    ⇒ genus: Nannophya
a ↑
b ↓
  • couplet drawingcouplet drawing
  • ● Anal loop present

3  
  • Libellulidae: Key couplet 9 of 67

  • couplet drawing
  • ● Anal loop rounded, poorly developed, of three to five cells
a ↑
b ↓
  • couplet drawing
  • ● Anal loop well developed, generally stocking-shaped, usually closed at tip

4  
  • Libellulidae: Key couplet 14 of 67

  • couplet drawingcouplet drawing
  • ○ Small (hindwing c. 25 mm)
    ● Synthorax and abdomen black with well-defined pale yellowish green markings

    ⇒ species: Forestwatcher (Huonia melvillensis) (part)
a ↑
b ↓
  • ○ Not as above

5  
  • Libellulidae: Key couplet 15 of 67

  • couplet drawing
  • ● Base of hindwing triangle just beyond to well beyond arculus
    ○ Top of frons brilliant metallic blue or green, particularly in male
a ↑
b ↓
  • couplet drawing
  • ● Base of hindwing triangle at or proximal to arculus
    ○ Top of frons, if metallic, dully so

6  
  • Libellulidae: Key couplet 16 of 67

  • ○ Fewer than nine antenodals in forewing

    ⇒ genus: Brachydiplax
a ↑
b ↓
  • ○ More than nine antenodals in forewing

7  
  • Libellulidae: Key couplet 18 of 67

  • couplet drawing
    couplet drawing
    couplet drawing
  • ● Arculus almost equidistant from second and third antenodal crossvein
    ● Nodus closer to base of wing than to apex, the ratio between the distances approximately 4:5
    ● Male abdomen slender, almost parallel-sided

    ⇒ genus: Agrionoptera
a ↑
b ↓
  • couplet drawing
    couplet drawing
    couplet drawing
  • ● Arculus in line or almost in line with second antenodal crossvein, or close to it
    ● Nodus almost equidistant from base and apex of wing
    ● Male abdomen broad, tapering from segment 3-10

    ⇒ species: Bicoloured Skimmer (Notolibellula bicolor)

Australian distribution