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Unicorn Hunter (Austrogomphus cornutus)

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PhotoID: AusDr071. Unicorn Hunter (Austrogomphus cornutus) - male
Unicorn Hunter (Austrogomphus cornutus) ♂

1 / 3; PhotoID: AusDr071 20/12/2008 12:35 F8 1/500 180mm ISO100 Canon50D -Crop -Flash MF
Adelong Creek, near Adelong, NSW [-35.295517°; 148.058350°]
PhotoID: AusDr072. Unicorn Hunter (Austrogomphus cornutus) - male
Unicorn Hunter (Austrogomphus cornutus) ♂

2 / 3; PhotoID: AusDr072 20/12/2008 12:36 F8 1/350 180mm ISO100 Canon50D -Crop -Flash MF
Adelong Creek, near Adelong, NSW [-35.295517°; 148.058350°]
PhotoID: AusDr073. Unicorn Hunter (Austrogomphus cornutus) - male
Unicorn Hunter (Austrogomphus cornutus) ♂

3 / 3; PhotoID: AusDr073 20/12/2008 12:36 F8 1/500 180mm ISO100 Canon50D -Crop -Flash MF
Adelong Creek, near Adelong, NSW [-35.295517°; 148.058350°]

Unicorn Hunter (Austrogomphus cornutus)

Australian distribution of Austrogomphus cornutus

Inhabits streams and rivers

© 2011 DECCW, NSW and DragonflyPix.com

  • Gomphidae: Key couplet 1 of 47

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  • ● Generally no incomplete antenodal crossvein proximal to Ax1 in any wing
    ● End of abdomen not elongate, mid-dorsal length of abdominal tergum 9 less than 2.3 mm in male, 2.1 mm in female
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  • Gomphidae: Key couplet 10 of 47

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  • ● Superior anal appendages parallel or divergent, not converging at tips, each bearing a long, curved ventrobasal branch
a ↑
  • Gomphidae: Key couplet 19 of 47

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  • ● Anterior of abdominal segments 3 and 4 with mid-dorsal yellow band, sometimes narrow, or entirely yellow
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  • Gomphidae: Key couplet 27 of 47

  • ○ Abdominal terga 9-10 usually marked with black or chocolate brown
    ○ If yellow or reddish, then tergum 8 substantially black
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  • Gomphidae: Key couplet 32 of 47

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  • ● Metanepisternum substantially pale
    ● Pterostigma yellow, brown or black, its length more than 3.3 times its maximum width
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  • Gomphidae: Key couplet 33 of 47

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  • ● Black and yellow or greenish-yellow, lacking lilac colouration
    ● Metepimeron posteriorly not margined with brown
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  • Gomphidae: Key couplet 35 of 47

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  • ● Antehumeral stripe aslant, isolated or its lower end fused with collar
    ● Black mark on lower mesepimeron extending to level of, or engulfing, metastigma
    ● If not, metapleural suture lined with black

    ⇒ genus: Austrogomphus
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  • Gomphidae: Key couplet 39 of 47

  • ○ Abdominal segment 10 black above
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  • Gomphidae: Key couplet 40 of 47

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  • ● Male superior appendage tapering evenly to sharp tip
    ● Rear of female occiput with flattened tooth on each side, behind inner margin of eye, its hind border irregularly serrated
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  • Gomphidae: Key couplet 41 of 47

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  • ● Antehumeral stripe broadly fused with collar
    ● Male occiput yellow, with darker edges, greatly swollen, forming blunt triangular horn
    ● Occipital margin of female swollen in centre

    ⇒ species: Unicorn Hunter (Austrogomphus cornutus)
b ↑