🦕 Prehistoric World Map

Callistosiren fossil map

Where fossils of Callistosiren have been found, shown on the Earth as it looked about 30 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 30 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 →

GroupEarly mammals
Lived27.3–23.04 million years ago (Chattian)
PeriodsPaleogene
FamilyDugongidae
Named byVelez-Juarbe and Domning 2015
Fossil records2 occurrences at 1 locations (PBDB)
Found inUnited States
Rock formationsLares Limestone

About Callistosiren

Callistosiren is an extinct genus of mammal which existed in what is now Puerto Rico during the late Oligocene (Chattian).

Text in “About” is quoted from the Wikipedia article Callistosiren (revision 1337996984), 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: Q65121986.

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