Species: Afronurus namnaoensis  Braasch & Boonsoong, 2010
Classification
Phylum: Arthropoda
 Class: Insecta
  Order: Ephemeroptera
   Family: Heptageniidae
    Genus: Afronurus

Morphology:
Adult:
 Male of Afronurus namnaoensis is separated from Vietnamese A. cervina in lacking a median penial cone, by the less deeply notched lobal apex, and titillators curved laterally and in their more medial position. Vietnamese A. dama presents a terminal apex of the penis slightly notched at the inner angles, whereas A. namnaoensis is recognized by somewhat elevated corners on both sides of the apices (Boonsoong and Braasch, 2013)
Larva:
 Larvae are recognizable by an unmarked forehead, pointed and weakly curved gill 1 and smoothly rounded triangular gill 5 with crosswise projection (Boonsoong and Braasch, 2013).


Figure


Larva of Afronurus namnaoensis
Habitat: Larvae of A. namnaoensis are probably the most abundant species on rocks and stones in Nam Lang River and elsewhere in current waters of northern and northeastern Thailand. These mayflies are an important food source for headwater stream fishes (Cyclocheilichthys apogon, Devario regina, Opsarius pulchellus, and Rasbora rasbora).

Distribution:
 - Chaiyaphum Province: Nam Nao National Park
 - Petchabun Province: Nam Nao National Park
 - Mae Hong Son Province
 - Chiang Mai Province

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

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