Argia infrequentula Fraser, 1946Coenagrionidae
Male appendages, lateral view
MaleFemaleMaleMale appendages, lateral view
Female immature or color form
Female immature or color formMaleMaleFemale

Male identification:

  • Labrum and postclypeus blue.
  • Pale markings on head sky blue, a pale bar between postocular spots.
  • Pale posterior spot on mesepimeron tiny, semi-circular, and clearly isolated from pale stripe on metepisternum.
  • Dorsum of S2 more than half blue; dorsum of S3 with a short blue triangle.
  • S4-7 black.
  • S8-9 blue on dorsum and sides; S10 blue on dorsum.
  • Upper appendage almost equal in length to lower appendage.

Female identification:

  • Labrum blue, postclypeus black or with some blue trim.
  • Head and thoracic markings sky blue.
  • Pale posterior spot on mesepimeron tiny and clearly isolated from pale stripe on metepisternum as in male, unlike Sp. E.
  • dorsum of S8 all blue; dorsum of S9 blue with two separate black bullet marks at base.
  • Ovipositor shorter than cerci, unlike Sp. E.

Similar species:

Male abdomen length: 27.0

Male hind wing length: 19.0

Female abdomen length: 26.0

Female hind wing length: 19.0

Local distribution: Eastern lowlands at 200 to 600 m.

Habitat: Small streams and light gaps in forest.

Abundance: Common.

Species range: Ecuador

Updated: 26 July 2013

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