Puerto Rico - Animals in the Habitats and the Fossil sites, and Biodiversity
Classified animal picture guide. Highlighting the link 
of species shows the images, and clicking the link shows Evolutionary Tree.
of species shows the images, and clicking the link shows Evolutionary Tree.The following fossils from the geologic age to the prehistorical age are excavated in Puerto Rico. The explanation in brackets is the ages they lived in extinct species. Note that Mya is million years ago. For example, "48.6～40.4 Mya" shows a range between 48.6 and 40.4 million years ago. The time range is shown in the Geological Time Table. The followings are a part of the Evolutionary Tree.
| Puerto Rico prehistoric age | ||||
| Puerto Rico extinct species Mesozoic |
 | Ammonite |
Parapuzosia (99.6～70.6 Mya; １．９５m) | |
| Puerto Rico extinct species Cenozoic |
 | Ground sloth |
Acratocnus (1.81～0.005 Mya) | |
 | Crocodile | Aktiogavialis (33～23 Mya) | ||
Puerto Rico is an island country located in the Greater Antillean archipelago of the Caribbean Sea and the tropical zone. It is located to the east of Dominican Rep. The following shows the distribution of animals in Puerto Rico.
