Papuan Demoiselle (Neurobasis australis)

The Papuan Demoiselle (Neurobasis australis) is a damselfly species of the family Calopterygidae, which contains 1 species in Australia.

The identification key to the Suborders and Families consists of 26 couplets, 4 of which are pertinent to Neurobasis australis. Click on the numbers on the right to display the corresponding couplets.

#	Family	Species	Couplet No.
	Calopterygidae	Papuan Demoiselle (Neurobasis australis)	Calopterygidae: Key couplet 1 of 26 ● Discoidal cell a simple quadrilateral, sometimes traversed by crossveins occasionally open at base ⇒ suborder: Zygoptera (damselflies) a ↑ Calopterygidae: Key couplet 2 of 26 ● Several antenodal crossveins, the extra veins not necessarily extending across both costal and subcostal spaces b ↑ Calopterygidae: Key couplet 11 of 26 ● Numerous antenodal crossveins in both the costal and subcostal spaces b ↑ Calopterygidae: Key couplet 12 of 26 ○ Abdomen much longer than wings ● Pterostigma absent ⇒ family: species: Calopterygidae: Papuan Demoiselle (Neurobasis australis) a ↑
1			Calopterygidae: Key couplet 1 of 26 ● Discoidal cell a simple quadrilateral, sometimes traversed by crossveins occasionally open at base ⇒ suborder: Zygoptera (damselflies) a ↑ b ↓ ● Discoidal cell divided into hypertriangle and triangle, often differing in shape in fore- and hindwing, and often traversed by crossveins ⇒ suborder: Epiprocta (dragonflies)
2			Calopterygidae: Key couplet 2 of 26 ● Normally two antenodal crossveins, both extending across costal and subcostal spaces a ↑ b ↓ ● Several antenodal crossveins, the extra veins not necessarily extending across both costal and subcostal spaces
3			Calopterygidae: Key couplet 11 of 26 ● Only the two basal antenodal crossveins extending across both costal and subcostal spaces, the additional crossveins confined to the costal space ⇒ family: genus: Diphlebiidae: Diphlebia a ↑ b ↓ ● Numerous antenodal crossveins in both the costal and subcostal spaces
4			Calopterygidae: Key couplet 12 of 26 ○ Abdomen much longer than wings ● Pterostigma absent ⇒ family: species: Calopterygidae: Papuan Demoiselle (Neurobasis australis) a ↑ b ↓ ○ Abdomen shorter than wings ● Pterostigma present ⇒ family: species: Chlorocyphidae: Papuan Jewel (Rhinocypha tincta semitincta)