''Xenosiren'' is an extinct genus of dugong which existed in Mexico during the Micoene.D. P. Domning. 1989. Fossil Sirenia of the West Atlantic and Caribbean region. III. Xenosiren yucateca, gen. et sp. nov. Journal of Vertebrate Paleontology 9(4):429-437

References

Miocene sirenians Fossil taxa described in 1989 Prehistoric placental genera {{Paleo-sirenian-stub