Species: Urothemis signata (Rambur, 1842)
Synonyms: Libellula sanguinea Burmeister, 1839 (nec Müller, 1764), Libellula insignata Selys, 1872, Urothemis yiei Asahina, 1972
Classification
Phylum: Arthropoda
 Class: Insecta
  Order: Odonata
   Family: Libellulidae
    Genus: Urothemis

Morphology:
Larva:
 
- Body medium size with many small black dots
- Antenna 8 segments
- Head with labium are triangular shape, posterior of head straight
- Labium spoon shape, distal part of each palpal lobe with deep indentation
- Labial palps with 8 palpal setae
- Premental setae 12 in each side of midline of mentum
- Wing-sheaths parallel
- Legs long, hind femur reaches to abdominal segmented 7, fore and mid tibia with a few rows of long hairs
- Mid dorsal spine developed on segmented 3-8, lateral spine developed on segmented 8-9


Figure
Urothemis signata, dorsal view of adult (Source: Vannachak, 2009)


Urothemis signata, A; dorsal view of larva; B: dorsal view of head; C: labium (Source: Vannachak, 2009)
Distribution:
 - southwestern Thailand
 - northeastern Thailand
 - central Thailand
 - southeastern Thailand
 - Chiang Mai Province
 - Chumphon Province
 - Phuket Province
 - Nakhon Si Thammarat 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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