Pretty Relict (Chorismagrion risi)

The Pretty Relict (Chorismagrion risi) is a damselfly species of the family Chorismagrionidae. This family contains only the single genus and species Chorismagrion risi.

The identification key to the Suborders and Families consists of 26 couplets, 5 of which are pertinent to Chorismagrion risi. Click on the numbers on the right to display the corresponding couplets.

#	Family	Species	Couplet No.
	Chorismagrionidae	Pretty Relict (Chorismagrion risi)	Chorismagrionidae: Key couplet 1 of 26 ● Discoidal cell a simple quadrilateral, sometimes traversed by crossveins occasionally open at base ⇒ suborder: Zygoptera (damselflies) a ↑ Chorismagrionidae: Key couplet 2 of 26 ● Normally two antenodal crossveins, both extending across costal and subcostal spaces a ↑ Chorismagrionidae: Key couplet 3 of 26 ● Anal vein long, straight or zigzagged, extending well beyond level of subnodus b ↑ Chorismagrionidae: Key couplet 6 of 26 ● Arculus of forewing incomplete so that discoidal cell is open at base a ↑ Chorismagrionidae: Key couplet 7 of 26 ● CuP strongly arched forward in first cell after it leaves posterior distal corner of discoidal cell ⇒ family: species: Chorismagrionidae: Pretty Relict (Chorismagrion risi) a ↑
1			Chorismagrionidae: 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			Chorismagrionidae: 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			Chorismagrionidae: Key couplet 3 of 26 ● Anal vein vestigial or absent, so that there are no longitudinal veins beyond the discoidal cell a ↑ b ↓ ● Anal vein long, straight or zigzagged, extending well beyond level of subnodus
4			Chorismagrionidae: Key couplet 6 of 26 ● Arculus of forewing incomplete so that discoidal cell is open at base a ↑ b ↓ ● Arculus of forewing complete, discoidal cell closed at base
5			Chorismagrionidae: Key couplet 7 of 26 ● CuP strongly arched forward in first cell after it leaves posterior distal corner of discoidal cell ⇒ family: species: Chorismagrionidae: Pretty Relict (Chorismagrion risi) a ↑ b ↓ ● CuP almost straight in first cell beyond discoidal cell ⇒ family: species: Hemiphlebiidae: Ancient Greenling (Hemiphlebia mirabilis)