DragonflyPix

Tropical Pinfly (Neosticta fraseri)

The Tropical Pinfly (Neosticta fraseri) is a damselfly species of the family Isostictidae, which contains 15 species in Australia.

The identification key to the family Isostictidae consists of 22 couplets, 5 of which are pertinent to Neosticta fraseri. 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.
 IsostictidaeTropical Pinfly
(Neosticta fraseri)
  • Isostictidae: Key couplet 1 of 22

  • couplet drawing
  • ● CuP three or more cells long
  • b ↑
  • Isostictidae: Key couplet 14 of 22

  • couplet drawing
  • ● Ac in hindwing distal to, or aligned with, Ax1
  • b ↑
  • Isostictidae: Key couplet 15 of 22

  • couplet drawing
  • ● Superior anal appendages of male much longer than inferiors
    ○ Anal appendages of female black

    ⇒ genus: Neosticta
  • a ↑
  • Isostictidae: Key couplet 17 of 22

  • couplet drawingcouplet drawing
  • ● Upper margin of posterior lobe of pronotum lowest in midline, appearing shallowly V-shaped in frontal view
    ● Superior appendages cleaver-shaped

    ⇒ species: Tropical Pinfly (Neosticta fraseri)
  • a ↑
  • Isostictidae: Key couplet 19 of 22

  • couplet drawingcouplet drawing
  • ● Posterior lobe of pronotum low, its height in midline less than half its width
    ● Hind border of proepimeron excavate, cowl-shaped, with dark rim

    ⇒ species: Tropical Pinfly (Neosticta fraseri)
  • a ↑
1  
  • Isostictidae: Key couplet 1 of 22

  • couplet drawingcouplet drawing
  • ● CuP one or two cells long, occasionally none
a ↑
b ↓
  • couplet drawing
  • ● CuP three or more cells long

2  
  • Isostictidae: Key couplet 14 of 22

  • couplet drawing
  • ● Ac in hindwing proximal to Ax1

    ⇒ species: Rock Narrow-Wing (Lithosticta macra)
a ↑
b ↓
  • couplet drawing
  • ● Ac in hindwing distal to, or aligned with, Ax1

3  
  • Isostictidae: Key couplet 15 of 22

  • couplet drawing
  • ● Superior anal appendages of male much longer than inferiors
    ○ Anal appendages of female black

    ⇒ genus: Neosticta
a ↑
b ↓
  • couplet drawing
  • ● Superior anal appendages of male shorter than inferiors
    ○ Anal appendages of female pale

    ⇒ genus: Austrosticta

4 Male only
  • Isostictidae: Key couplet 17 of 22

  • couplet drawingcouplet drawing
  • ● Upper margin of posterior lobe of pronotum lowest in midline, appearing shallowly V-shaped in frontal view
    ● Superior appendages cleaver-shaped

    ⇒ species: Tropical Pinfly (Neosticta fraseri)
a ↑
b ↓
  • couplet drawingcouplet drawingcouplet drawing
  • ● Upper margin of posterior lobe of pronotum slightly bowed upwards on each side of midline, then downturned towards lateral horns
    ● Superior appendages cleaver-shaped, or forcipate

5 Female only
  • Isostictidae: Key couplet 19 of 22

  • couplet drawingcouplet drawing
  • ● Posterior lobe of pronotum low, its height in midline less than half its width
    ● Hind border of proepimeron excavate, cowl-shaped, with dark rim

    ⇒ species: Tropical Pinfly (Neosticta fraseri)
a ↑
b ↓
  • couplet drawingcouplet drawing
  • ● Posterior lobe of pronotum strongly produced and swollen in midline, its height more than half its width

Australian distribution