Caio is a genus of moths in the family Saturniidae. The genus was described by Travassos and Noronha in 1968.

Species Caio championi (Druce, 1886) Caio chiapasiana Brechlin & Meister, 2010 Caio harrietae (Forbes, 1944) Caio hidalgensis Brechlin & Meister, 2010 Caio richardsoni (Druce, 1890) Caio romulus (Maassen, 1869) Caio undilinea (Schaus, 1921) Caio witti Brechlin & Meister, 2010

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