Species: Procloeon simensis  Tungpairojwong & Bae, 2015
Classification
Phylum: Arthropoda
 Class: Insecta
  Order: Ephemeroptera
   Family: Baetidae
    Genus: Procloeon
Collection specimen
Holotype:
 - mature male larva in Entomological Museum of Korea University
Paratype:
     - 87 larvae in Entomological Museum of Korea University

Morphology:
Larva:
 The larva of Procloeon siamensis can be distinguished from congeners by the combination of the following diagnostic characters: terminal segment of maxillary palp slightly depressed near apex, 0.5×length of segment 2; gills palm-like; lateral spines of tergum 8I ca. 1-2; gill 7 with a small outgrowth process (Tungpairojwong and Bae, 2015).


Figure


Mature nymph of Procloeon simensis (Source: Tungpairojwong and Bae, 2015)
Habitat: The larvae of Procloeon siamensis were collected from the pool areas of slow-flowing permanent streams with abundant fallen leaves and marginal vegetation. Substrates mainly consisted of boulders mixed with cobbles, gravel, sand, and fallen leaves on a large bedrock.

Distribution:
 - Petchabun Province, Nam Nao National Park

Work cited:
 - Tungpairojwong, N. and Bae, Y.J. 2015. Three New Species of Procloeon (Ephemeroptera: Baetidae) from Thailand. Animal Systematics, Evolution and Diversity 31(1): 22–30.

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