Xenosiren fossil map
Where fossils of Xenosiren have been found, shown on the Earth as it looked about 5 million years ago and on today’s map.
Dots are fossil collections recorded in the Paleobiology Database. The “then” view moves today’s fossil sites back to their positions 5 million years ago (the time slice nearest the median age of the fossils) using the Merdith et al. (2021) plate model; positions are approximate. Open on the timeline map →
| Group | Early mammals |
|---|---|
| Lived | 9.4–4.7 million years ago (Tortonian to Zanclean) |
| Periods | Neogene |
| Family | Dugongidae |
| Named by | Domning 1989 |
| Fossil records | 2 occurrences at 1 locations (PBDB) |
| Found in | Mexico |
| Rock formations | Carrillo Puerto |
About Xenosiren
Xenosiren is an extinct genus of dugong which existed in Mexico during the Miocene. The genus is classified in the subfamily Dugonginae as well as in the family Dugongidae. The genus contains only 1 species, X. yucateca. The size estimate of Xenosiren may have been larger than the modern manatee, presumably the same size as the West Indian manatee, an extant species in the manatee family.
Text in “About” is quoted from the Wikipedia article Xenosiren (revision 1337997018), licensed under CC BY-SA 4.0; introduction excerpted verbatim, formatting removed. Ages, family, authority and fossil records: Paleobiology Database, accessed 23 October 2026. Ages are those of the rock layers the fossils were found in. Wikidata: Q65121988.
