Species: Zygonyx iris Selys, 1869
Synonyms: Zygonyx davina Fraser, 1926, Zygonidia malayana Laidlaw, 1902, Zygonyx iris errans Lieftinck, 1953
Classification
Phylum: Arthropoda
 Class: Insecta
  Order: Odonata
   Family: Libellulidae
    Genus: Zygonyx

Morphology:
Larva:
 
- Body medium size
- Antenna small with 8 segments
- Labium spoon shape, distal part of each palpal lobe with crenuate teeth
- Labial palps with 8-11 palpal setae
- Premental setae 16-20 in each side of midline of mentum and setae nearly connected in midline
- Wing-sheaths slightly divergent
- Legs long, hind femur reach to abdomen segmented 7, apices of femora with heavy spines


Figure
Zygonyx iris, dorsal view of adult (Source: Vannachak, 2009)


Zygonyx iris, A: dorsal view of larva; B: dorsal view of head; C: dorsal and lateral spines (Source: Vannachak, 2009)
Distribution:
 - southwestern Thailand
 - southern Thailand
 - Chiang Mai Province
 - Phrae Province
 - Chaiyaphum Province
 - Nakhon Ratchasima Province
 - Saraburi Province
 - Nakhon Nayok Province
 - Chanthaburi Province
 - Trat Province
 - Khon Kaen 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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