Argia sp. Y Coenagrionidae

Male identification:

  • Labrum black; postclypeus and postocular spots gun metal blue.
  • Underside of head black with a very narrow pale stripe along eye margin.
  • Antehumeral stripe gun metal blue; pale stripes on side of thorax purple-blue.
  • Wings brown, antenodal cells 5, 4.
  • S1 mostly blue, S2 with blue on dorsum and a line on lower side, S3-7 all black, S8-9 blue on upper half, S10 black.
  • Lower appendage bilobed, the upper lobe strongly developed and pointing upward.

Female identification:

  • Labrum and postclypeus black, a brown mark on eye margin below antenna, postocular spots brown.
  • Underside of head all black.
  • Antehumeral stripe brown, broken at posterior end.
  • S1 with a blurry beige patch on side, S2-10 totally black.
  • Ovipositor longer than S10, but shorter than cerci.

Male abdomen length: 26.0

Male hind wing length: 19.0

Female abdomen length: 25.0

Female hind wing length: 21.0

Local distribution: Eastern lowlands.

Habitat: Quiet pools in large slow rivers.

Abundance: Rare.

Species range: Ecuador

Updated: 18 February 2014

Credits: Text and images copyright by William Haber and David Wagner, 2013