Species: Ceriagrion chaoi Schmidt, 1964
Classification
Phylum: Arthropoda
 Class: Insecta
  Order: Odonata
   Family: Coenagrionidae
    Genus: Ceriagrion

Morphology:
Larva:
 
- Body medium size
- Antenna 7 segments
- Posterior of head convex inward, occiput round
- Compound eyes round
- Labium quadrate or more or less triangular in shape, with moveable and end hooks
- Abdominal segment smooth, spine present on 7-10


Figure
Ceriagrion chaoi, lateral view of adult (Source: Vannachak, 2009)


Ceriagrion chaoi, A: dorsal view of larva; B: labium; C: gill lamella (Source: Vannachak, 2009)
Distribution:
 - Krabi Province
 - Kanchanaburi Province
 - Chiang Mai Province
 - Chiang Rai Province
 - Chaiyaphum Province

Work cited:
 - Hämäläinen, M. and Pinratana, A. 1999. Atlas of the Dragonflies of Thailand: Distribution Maps by Provinces. Brothers of St. Gabriel in Thailand, Bangkok.
 - Vannachak, V. 2009. Association of Odonnata nymphs and adults in Muang district, Khon Kaen Province. Special study. Khon Kaen University.

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