Common Archtail (Nannophlebia risi)

The Common Archtail (Nannophlebia risi) is a dragonfly species of the family Libellulidae, which contains 56 species in Australia.

The identification key to the family Libellulidae consists of 67 couplets, 7 of which are pertinent to Nannophlebia risi. 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.
	Libellulidae	Common Archtail (Nannophlebia risi)	Libellulidae: Key couplet 1 of 67 ● Distal antenodal of forewing complete, both costal and subcostal sections present a ↑ Libellulidae: Key couplet 2 of 67 ● Anal loop present b ↑ Libellulidae: Key couplet 9 of 67 ● Anal loop rounded, poorly developed, of three to five cells a ↑ Libellulidae: Key couplet 10 of 67 ● Basal side of hindwing triangle close to or at arculus ⇒ genus: Nannophlebia b ↑ Libellulidae: Key couplet 11 of 67 ● Abdominal tergum 4 with two yellow spots, one central and one in basal half, sometimes fused b ↑ Libellulidae: Key couplet 12 of 67 ○ Top of vertex yellow ● Abdominal terga 6 and 7 with basal and central yellow spots, sometimes fused or partly so b ↑ Libellulidae: Key couplet 13 of 67 ● Genae completely black ⇒ species: Common Archtail (Nannophlebia risi) a ↑
1			Libellulidae: Key couplet 1 of 67 ● Distal antenodal of forewing complete, both costal and subcostal sections present a ↑ b ↓ ● Distal antenodal of forewing incomplete, only the costal section present
2			Libellulidae: Key couplet 2 of 67 ● Hindwing lacking anal loop ⇒ genus: Nannophya a ↑ b ↓ ● Anal loop present
3			Libellulidae: Key couplet 9 of 67 ● Anal loop rounded, poorly developed, of three to five cells a ↑ b ↓ ● Anal loop well developed, generally stocking-shaped, usually closed at tip
4			Libellulidae: Key couplet 10 of 67 ● Basal side of hindwing triangle well beyond arculus ⇒ species: Rainforest Elf (Tetrathemis irregularis cladophila) a ↑ b ↓ ● Basal side of hindwing triangle close to or at arculus ⇒ genus: Nannophlebia
5			Libellulidae: Key couplet 11 of 67 ● Abdominal tergum 4 with small, central yellow spot ⇒ species: Elusive Archtail (Nannophlebia eludens) a ↑ b ↓ ● Abdominal tergum 4 with two yellow spots, one central and one in basal half, sometimes fused
6			Libellulidae: Key couplet 12 of 67 ○ Top of vertex black ● Abdominal tergum 6 and, usually, 7 with single, central yellow spot ⇒ species: Top End Archtail (Nannophlebia mudginberri) a ↑ b ↓ ○ Top of vertex yellow ● Abdominal terga 6 and 7 with basal and central yellow spots, sometimes fused or partly so
7			Libellulidae: Key couplet 13 of 67 ● Genae completely black ⇒ species: Common Archtail (Nannophlebia risi) a ↑ b ↓ ● Genae black with bright white spot ⇒ species: Pilbara Archtail (Nannophlebia injibandi)