DragonflyPix

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.

#FamilySpeciesCouplet No.
 ChorismagrionidaePretty Relict
(Chorismagrion risi)
  • Chorismagrionidae: Key couplet 1 of 26

  • couplet drawingcouplet drawing
    couplet drawing
  • ● Discoidal cell a simple quadrilateral, sometimes traversed by crossveins occasionally open at base

    ⇒ suborder: Zygoptera (damselflies)
  • a ↑
  • Chorismagrionidae: Key couplet 2 of 26

  • couplet drawing
  • ● Normally two antenodal crossveins, both extending across costal and subcostal spaces
  • a ↑
  • Chorismagrionidae: Key couplet 3 of 26

  • couplet drawingcouplet drawing
  • ● Anal vein long, straight or zigzagged, extending well beyond level of subnodus
  • b ↑
  • Chorismagrionidae: Key couplet 6 of 26

  • couplet drawingcouplet drawing
  • ● Arculus of forewing incomplete so that discoidal cell is open at base
  • a ↑
  • Chorismagrionidae: Key couplet 7 of 26

  • couplet drawing
  • ● 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

  • couplet drawingcouplet drawing
    couplet drawing
  • ● Discoidal cell a simple quadrilateral, sometimes traversed by crossveins occasionally open at base

    ⇒ suborder: Zygoptera (damselflies)
a ↑
b ↓
  • couplet drawingcouplet drawing
    couplet drawingcouplet drawing
    couplet drawingcouplet drawing
  • ● 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

  • couplet drawing
  • ● Normally two antenodal crossveins, both extending across costal and subcostal spaces
a ↑
b ↓
  • couplet drawingcouplet drawing
  • ● Several antenodal crossveins, the extra veins not necessarily extending across both costal and subcostal spaces

3  
  • Chorismagrionidae: Key couplet 3 of 26

  • couplet drawingcouplet drawing
    couplet drawing
  • ● Anal vein vestigial or absent, so that there are no longitudinal veins beyond the discoidal cell
a ↑
b ↓
  • couplet drawingcouplet drawing
  • ● Anal vein long, straight or zigzagged, extending well beyond level of subnodus

4  
  • Chorismagrionidae: Key couplet 6 of 26

  • couplet drawingcouplet drawing
  • ● Arculus of forewing incomplete so that discoidal cell is open at base
a ↑
b ↓
  • couplet drawingcouplet drawing
  • ● Arculus of forewing complete, discoidal cell closed at base

5  
  • Chorismagrionidae: Key couplet 7 of 26

  • couplet drawing
  • ● 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 ↓
  • couplet drawing
  • ● CuP almost straight in first cell beyond discoidal cell

    ⇒ family: species: Hemiphlebiidae: Ancient Greenling (Hemiphlebia mirabilis)

Australian distribution