Murray River Hunter (Austrogomphus angelorum)

The Murray River Hunter (Austrogomphus angelorum) is a dragonfly species of the family Gomphidae, which contains 35 species in Australia.

The identification key to the family Gomphidae consists of 47 couplets, 9 of which are pertinent to Austrogomphus angelorum. 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.

#	Family	Species	Couplet No.
	Gomphidae	Murray River Hunter (Austrogomphus angelorum)	Gomphidae: Key couplet 1 of 47 ● 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 b ↑ Gomphidae: Key couplet 10 of 47 ● Superior anal appendages parallel or divergent, not converging at tips, each bearing a long, curved ventrobasal branch a ↑ Gomphidae: Key couplet 19 of 47 ● Anterior of abdominal segments 3 and 4 with mid-dorsal yellow band, sometimes narrow, or entirely yellow b ↑ 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 b ↑ Gomphidae: Key couplet 32 of 47 ● Metanepisternum substantially pale ● Pterostigma yellow, brown or black, its length more than 3.3 times its maximum width b ↑ Gomphidae: Key couplet 33 of 47 ● Black and yellow or greenish-yellow, lacking lilac colouration ● Metepimeron posteriorly not margined with brown b ↑ Gomphidae: Key couplet 35 of 47 ● 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 b ↑ Gomphidae: Key couplet 39 of 47 ○ Abdominal segment 10 black above a ↑ Gomphidae: Key couplet 40 of 47 ● Upper surface and sides of male superior appendages narrowing abruptly near apex, producing a very sharp, discrete tip ● Rear of female occiput with upturned, variably flattened tooth on each side, behind inner margin of eye, and pair of thick hooks, with out-turned lips, near the midline ⇒ species: Murray River Hunter (Austrogomphus angelorum) a ↑
1			Gomphidae: Key couplet 1 of 47 ● Incomplete (subcostal) antenodal crossvein proximal to Ax1 usually present in forewings, sometimes lacking in hindwings ● End of abdomen elongate, mid-dorsal length of abdominal tergum 9 more than 2.4 mm in male, 2.3 mm in female ⇒ genus: Antipodogomphus a ↑ b ↓ ● 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
2		Male only	Gomphidae: Key couplet 10 of 47 ● Superior anal appendages parallel or divergent, not converging at tips, each bearing a long, curved ventrobasal branch a ↑ b ↓ ● Superior anal appendages converging at tips, bearing basal, ventral to lateral spine or toothed spur
3		Female only	Gomphidae: Key couplet 19 of 47 ● Anterior part of abdominal segments 3 and 4, in front of supplementary transverse carina, with broad, mid-dorsal black patch or band a ↑ b ↓ ● Anterior of abdominal segments 3 and 4 with mid-dorsal yellow band, sometimes narrow, or entirely yellow
4			Gomphidae: Key couplet 27 of 47 ○ Abdominal terga 9-10 yellow or pale reddish brown ○ Tergum 8 similar or with dark reddish brown to black distal half a ↑ b ↓ ○ Abdominal terga 9-10 usually marked with black or chocolate brown ○ If yellow or reddish, then tergum 8 substantially black
5			Gomphidae: Key couplet 32 of 47 ● Metanepisternum black, with small yellow dorsal spot ● Pterostigma black, swollen, its length less than 3.3 times its maximum width ⇒ species: Twinspot Hunter (Austroepigomphus praeruptus) a ↑ b ↓ ● Metanepisternum substantially pale ● Pterostigma yellow, brown or black, its length more than 3.3 times its maximum width
6			Gomphidae: Key couplet 33 of 47 ● Brown and cream-coloured, with lilac colouration on side of synthorax, or brown and greenish yellow ● Lower half of metepimeron posteriorly margined with brown ⇒ genus: Zephyrogomphus a ↑ b ↓ ● Black and yellow or greenish-yellow, lacking lilac colouration ● Metepimeron posteriorly not margined with brown
7			Gomphidae: Key couplet 35 of 47 ● Antehumeral stripe with inner margin almost parallel to dorsal carina, its lower end fused with collar ● Black mark on lower mesepimeron not extending to metastigma ● Metapleural suture not lined with black ⇒ genus: Austrogomphus a ↑ b ↓ ● 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
8			Gomphidae: Key couplet 39 of 47 ○ Abdominal segment 10 black above a ↑ b ↓ ○ Abdominal segment 10 yellow, or black and yellow above
9			Gomphidae: Key couplet 40 of 47 ● Upper surface and sides of male superior appendages narrowing abruptly near apex, producing a very sharp, discrete tip ● Rear of female occiput with upturned, variably flattened tooth on each side, behind inner margin of eye, and pair of thick hooks, with out-turned lips, near the midline ⇒ species: Murray River Hunter (Austrogomphus angelorum) a ↑ b ↓ ● 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