Species: Compsoneuria thienemanni Ulmer, 1939
Classification
Phylum: Arthropoda
 Class: Insecta
  Order: Ephemeroptera
   Family: Heptageniidae
    Genus: Compsoneuria

Morphology:
Larva:
 Compsoneuria thienemanni is recognised by having gills 2-6 without emarginations and gill 7 leaf-like and pointed apically; pale dots and marks on abdomen (Boonsoong and Braasch, 2013).


Figure


Larva of Compsoneuria thienemanni
Habitat: Compsoneuria thienemanni larvae are found abundantly in the large rivers at lower altitudes where it is encountered clinging to floating submerged water plants. A few male specimens of C. thienemanni were found in the mountainous region of Mae Hong Son province (Boonsoong and Braasch, 2013).

Distribution:
 - Mae Hong Son Province
 - Chiang Mai Province
 - Trat Province

Work cited:
 - Boonsoong, B. and Braasch, D. 2013. Heptageniidae (Insecta, Ephemeroptera) of Thailand. ZooKeys 272: 61–93.

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