Twinspot Hunter (Austroepigomphus praeruptus)

The Twinspot Hunter (Austroepigomphus praeruptus) 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, 5 of which are pertinent to Austroepigomphus praeruptus. 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	Twinspot Hunter (Austroepigomphus praeruptus)	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 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 ↑
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