Prehistoric sirenians had overlapping ranges, unlike modern sirenians

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Prehistoric sirenians had overlapping ranges, unlike modern sirenians




Manatees and dugongs today have ranges that don't overlap. But their ancestors were frequently sympatric; that is, there was a level of diversity in manatees and dugongs within a given ecosystem.

Velez-Juarbe, J., Domning, D.P., & Pyenson, N.D. (2012) Iterative evolution of sympatric seacow (Dugongidae, Sirenia) assemblages during the past ∼26 million years. PLoS ONE. 7(2): e31294. doi:10.1371/journal.pone.0031294
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