Species: Caenis picea Kimmins, 1947
Classification
Phylum: Arthropoda
 Class: Insecta
  Order: Ephemeroptera
   Family: Caenidae
    Genus: Caenis


Figure


Dorsal view of Caenis picea
Distribution:
 - Yasothon Province; Tha Sai Mae Su Jin, Chi River
 - Khon Kaen Province; Ban None Karm Phae, Phong River
 - Maha Sarakham Province; Ban Kui Pang, Phong River
 - Khon Kaen Province; Ban Kut Kwang, Phong River
 - Khon Kaen Province; Ban Or Noi, Phong River
 - Nakorn Phanom Province; Nam Kham River
 - Ubon Ratchathani Province; Kong Chiam District, Mun River

Work cited:
 - Malzacher, P. 2015. Revision of the Oriental species of the genus Caenis Stephens (Insecta: Ephemeroptera: Caenidae). Stuttgarter Beiträge zur Naturkunde A, Neue Serie 8: 27–47.
 - Malzacher, P and Sangpradub, N. 2021. New mayfly species of Caenis and Kalimaenis from Thailand and descriptions of two new genera of the subfamily Caeninae (Ephemeroptera: Caenidae). Integrative Systematics: Stuttgart Contributions to Natural History 3(1):1-33.

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