Promecosoma is a genus of leaf beetles in the subfamily Eumolpinae. There are 26 described species in Promecosoma. Most species are found in Mexico, though two species are also known from southern Arizona.
Riley, Edward G.; Clark, Shawn M.; Seeno, Terry N. (2003). Catalog of the leaf beetles of America north of Mexico (Coleoptera: Megalopodidae, Orsodacnidae and Chrysomelidae, excluding Bruchinae). Special Publication No. 1. The Coleopterists' Society. ISBN978-0-9726087-1-8.
Lobl, I.; Smetana, A., eds. (2013). Catalogue of Palaearctic Coleoptera, Volume 6: Chrysomeloidea. Apollo Books. ISBN978-90-04-26091-7.