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Lesser Duskhawker (Gynacantha dobsoni)

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PhotoID: AusDr257. Lesser Duskhawker (Gynacantha dobsoni) - female
Lesser Duskhawker (Gynacantha dobsoni) ♀

1 / 5; PhotoID: AusDr257 22/11/2011 10:27 F8 1/250 180mm ISO400 Canon7D -Crop -Flash MF
Emerald Creek, near Mareeba, QLD [-17.052550°; 145.541333°]
PhotoID: AusDr258. Lesser Duskhawker (Gynacantha dobsoni) - female
Lesser Duskhawker (Gynacantha dobsoni) ♀

2 / 5; PhotoID: AusDr258 22/11/2011 10:35 F8 1/400 180mm ISO800 Canon7D -Crop -Flash MF
Emerald Creek, near Mareeba, QLD [-17.052550°; 145.541333°]
PhotoID: AusDr259. Lesser Duskhawker (Gynacantha dobsoni) - female
Lesser Duskhawker (Gynacantha dobsoni) ♀

3 / 5; PhotoID: AusDr259 22/11/2011 10:43 F8 1/320 180mm ISO800 Canon7D -Crop -Flash MF
Emerald Creek, near Mareeba, QLD [-17.052550°; 145.541333°]
PhotoID: AusDr260. Lesser Duskhawker (Gynacantha dobsoni) - female
Lesser Duskhawker (Gynacantha dobsoni) ♀

4 / 5; PhotoID: AusDr260 22/11/2011 11:01 F8 1/320 180mm ISO400 Canon50D -Crop -Flash MF
Emerald Creek, near Mareeba, QLD [-17.052550°; 145.541333°]
PhotoID: AusDr261. Lesser Duskhawker (Gynacantha dobsoni) - female
Lesser Duskhawker (Gynacantha dobsoni) ♀

5 / 5; PhotoID: AusDr261 22/11/2011 11:12 F8 1/320 180mm ISO400 Canon50D -Crop -Flash MF
Emerald Creek, near Mareeba, QLD [-17.052550°; 145.541333°]

Lesser Duskhawker (Gynacantha dobsoni)

Australian distribution of Gynacantha dobsoni

Inhabits pools, ponds and swamps

© 2011 DECCW, NSW and DragonflyPix.com

  • Aeshnidae: Key couplet 1 of 12

  • couplet drawing
    couplet drawingcouplet drawing
  • ● Prominent fork of IR3 near or proximal to level of basal end of pterostigma in both wings
    ● Anal margin of hindwing rounded in female, angulated in male, forming anal triangle
    ● Male with auricles
b ↑
  • Aeshnidae: Key couplet 5 of 12

  • couplet drawing
  • ● Space between CuP and 1A of hindwing slightly and continuously tapering from proximal to distal end, proximal portion usually one, occasionally two cells wide
a ↑
  • Aeshnidae: Key couplet 6 of 12

  • couplet drawingcouplet drawingcouplet drawing
  • ● Anal triangle of male broad or narrow, with three or more cells
    ● Dentigerous plate of female two-pronged
b ↑
  • Aeshnidae: Key couplet 7 of 12

  • couplet drawing
  • ● Front of synthorax dull brown or green, pale or dark, with or without an ill-defined pale patch in lower, outer corner
    ○ Abdominal segments 4-7 with, at most, small pale spots, often almost unpatterned

    ⇒ genus: Gynacantha
b ↑
  • Aeshnidae: Key couplet 8 of 12

  • couplet drawing
  • ● Top of frons with variably dark mid-dorsal line, commonly forming T-shaped mark with dark transverse mark on crest
b ↑
  • Aeshnidae: Key couplet 9 of 12

  • couplet drawingcouplet drawingcouplet drawing
  • ● Segment 3 less strongly constricted, width of 'waist' c. 1.3 mm or more in male, 1.8 mm or more in female
b ↑
  • Aeshnidae: Key couplet 11 of 12

  • couplet drawingcouplet drawingcouplet drawing
  • ● Width of male 'waist' on abdominal segment 3 1.3-1.8 mm
    ● 8-30 (commonly 15-25) black denticles around margin of genital fossa
    ● Ventral region of tergum 3 of female relatively narrow, hind margin from last tooth on lateral ridge to alignment of inner ridge less than 1.1 mm

    ⇒ species: Lesser Duskhawker (Gynacantha dobsoni)
a ↑