Barrington Flatwing (Austroargiolestes brookhousei)

The Barrington Flatwing (Austroargiolestes brookhousei) is a damselfly species of the family Megapodagrionidae, which contains 22 species in Australia.

The identification key to the family Megapodagrionidae consists of 31 couplets, 9 of which are pertinent to Austroargiolestes brookhousei. 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.
	Megapodagrionidae	Barrington Flatwing (Austroargiolestes brookhousei)	Megapodagrionidae: Key couplet 1 of 31 ○ Smaller, with abdomen shorter than 42 mm, hindwings shorter than 35 mm ● Fewer than 27 postnodals b ↑ Megapodagrionidae: Key couplet 2 of 31 ● Generally three or more cells, rarely two in discoidal field between discoidal cell and level of subnodus ● Male superior anal appendages with ventral spur ⇒ genus: Austroargiolestes a ↑ Megapodagrionidae: Key couplet 3 of 31 ● Anterior frons, clypeus and labrum dark greenish brown to black b ↑ Megapodagrionidae: Key couplet 6 of 31 ● Median part to much of front of synthorax dark brown to black with pale to yellowish brown humeral stripe on each side, sometimes pruinescent b ↑ Megapodagrionidae: Key couplet 7 of 31 ● Humeral stripe constricted near upper end, then broadened at tip a ↑ Megapodagrionidae: Key couplet 8 of 31 ● Basal angle of superior anal appendages slightly angulated ● Tips of appendages overlapping if inner edges of basal portion are set parallel ⇒ species: Barrington Flatwing (Austroargiolestes brookhousei) b ↑ Megapodagrionidae: Key couplet 14 of 31 ● Median part to much of front of synthorax dark brown to black, with pale to red-brown humeral stripe on each side, sometimes pruinescent b ↑ Megapodagrionidae: Key couplet 15 of 31 ● Pale stripe in front of mesopleural suture constricted near upper end, then broadened at tip, not obscured by pruinescence a ↑ Megapodagrionidae: Key couplet 16 of 31 ● Posterior lobe of pronotum with corners slightly angulated ● Tergum 10 without pale anteromedian spot ⇒ species: Barrington Flatwing (Austroargiolestes brookhousei) b ↑
1			Megapodagrionidae: Key couplet 1 of 31 ○ Large, with abdomen longer than 42 mm ○ hindwings longer than 40 mm ● More than 27 postnodals ⇒ species: Treehole Flatwing (Podopteryx selysi) a ↑ b ↓ ○ Smaller, with abdomen shorter than 42 mm, hindwings shorter than 35 mm ● Fewer than 27 postnodals
2			Megapodagrionidae: Key couplet 2 of 31 ● Generally three or more cells, rarely two in discoidal field between discoidal cell and level of subnodus ● Male superior anal appendages with ventral spur ⇒ genus: Austroargiolestes a ↑ b ↓ ● Generally two, sometimes three, cells in discoidal field between discoidal cell and level of subnodus ● Male superior anal appendage without ventral spur
3			Megapodagrionidae: Key couplet 3 of 31 ● Anterior frons and postclypeus largely pale, yellowish or reddish orange a ↑ b ↓ ● Anterior frons, clypeus and labrum dark greenish brown to black
4		Male only	Megapodagrionidae: Key couplet 6 of 31 ● Front of synthorax almost completely pale, yellow to orange, not pruinescent ⇒ species: Golden Flatwing (Austroargiolestes chrysoides) a ↑ b ↓ ● Median part to much of front of synthorax dark brown to black with pale to yellowish brown humeral stripe on each side, sometimes pruinescent
5		Male only	Megapodagrionidae: Key couplet 7 of 31 ● Humeral stripe constricted near upper end, then broadened at tip a ↑ b ↓ ● Humeral stripe not widened at upper end
6		Male only	Megapodagrionidae: Key couplet 8 of 31 ● Basal angle of superior anal appendages almost uniformly rounded ● Tips of appendages not overlapping if inner edges of basal portion are set parallel ⇒ species: New England Flatwing (Austroargiolestes alpinus) a ↑ b ↓ ● Basal angle of superior anal appendages slightly angulated ● Tips of appendages overlapping if inner edges of basal portion are set parallel ⇒ species: Barrington Flatwing (Austroargiolestes brookhousei)
7		Female only	Megapodagrionidae: Key couplet 14 of 31 ● Front of synthorax almost completely pale yellow to white ⇒ species: Golden Flatwing (Austroargiolestes chrysoides) (possibly teneral specimens) a ↑ b ↓ ● Median part to much of front of synthorax dark brown to black, with pale to red-brown humeral stripe on each side, sometimes pruinescent
8		Female only	Megapodagrionidae: Key couplet 15 of 31 ● Pale stripe in front of mesopleural suture constricted near upper end, then broadened at tip, not obscured by pruinescence a ↑ b ↓ ● Pale stripe in front of mesopleural suture not widened at tip, its inner margin commonly converging on mesopleural suture, sometimes obscured by pruinescence
9		Female only	Megapodagrionidae: Key couplet 16 of 31 ● Posterior lobe of pronotum with corners almost uniformly rounded ● Tergum 10 with or without pale anteromedian spot ⇒ species: New England Flatwing (Austroargiolestes alpinus) a ↑ b ↓ ● Posterior lobe of pronotum with corners slightly angulated ● Tergum 10 without pale anteromedian spot ⇒ species: Barrington Flatwing (Austroargiolestes brookhousei)