The Güines Formation is a geologic formation in Cuba. It preserves fossils dating back to the Early to Middle Miocene period. Among others, fossils of the prehistoric dugong, Metaxytherium were found in the formation.^[1]

• Aturia cubaensis
• Metaxytherium riveroi

• List of fossiliferous stratigraphic units in Cuba

• Bermúdez, Pedro J (1961), "Las formaciones geológicas de Cuba" (PDF), Geología Cubana, 1: 1–180, retrieved 2019-02-06
• A. K. Miller and H. R. Downs. 1950. Tertiary nautiloids of the Americas: supplement. Journal of Paleontology 24:1-18
• L. S. Varona. 1972. Un Dugongido del Mioceno de Cuba (Mammalia: Sirenia). Sociedad de Ciencias Naturales La Salle: Caracas, Venezuela Memoria 91(32):5-19