Swamp Tigertail (Synthemis eustalacta)

The Swamp Tigertail (Synthemis eustalacta) is a dragonfly species of the family Synthemistidae, which contains 26 species in Australia.

The identification key to the family Synthemistidae consists of 26 couplets, 4 of which are pertinent to Synthemis eustalacta. 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.
	Synthemistidae	Swamp Tigertail (Synthemis eustalacta)	Synthemistidae: Key couplet 1 of 26 ○ Dark markings, if present, confined to basal parts of wings b ↑ Synthemistidae: Key couplet 2 of 26 ● Generally two to five crossveins in median space of all wings b ↑ Synthemistidae: Key couplet 9 of 26 ● No accessory thick antenodal in forewing, only the two primaries present ● Male tergum 10 with posteriorly directed pale mid-dorsal cone ● Ovipositor reaching beyond segment 9 ⇒ genus: Synthemis a ↑ Synthemistidae: Key couplet 10 of 26 ● Large pale spot on supplementary transverse carina on each side of abdominal tergum 2, smaller in male than in female ⇒ species: Swamp Tigertail (Synthemis eustalacta) a ↑
1			Synthemistidae: Key couplet 1 of 26 ○ Wings with dark brown spots at nodus ⇒ species: Tasmanian Spotwing (Synthemiopsis gomphomacromioides) a ↑ b ↓ ○ Dark markings, if present, confined to basal parts of wings
2			Synthemistidae: Key couplet 2 of 26 ● Generally one crossvein in median space, sometimes two in one or two wings a ↑ b ↓ ● Generally two to five crossveins in median space of all wings
3			Synthemistidae: Key couplet 9 of 26 ● No accessory thick antenodal in forewing, only the two primaries present ● Male tergum 10 with posteriorly directed pale mid-dorsal cone ● Ovipositor reaching beyond segment 9 ⇒ genus: Synthemis a ↑ b ↓ ● An accessory thick antenodal in forewing in addition to the two primaries; this and the two previous alternating with thin antenodals ○ Male tergum 10 without pale dorsal cone ○ Ovipositor, if developed, not reaching beyond segment 9
4			Synthemistidae: Key couplet 10 of 26 ● Large pale spot on supplementary transverse carina on each side of abdominal tergum 2, smaller in male than in female ⇒ species: Swamp Tigertail (Synthemis eustalacta) a ↑ b ↓ ● At most, small pale line on supplementary transverse carina on each side of male abdominal tergum 2, larger oval mark in female ⇒ species: Tasmanian Swamp Tigertail (Synthemis tasmanica)