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Prehistoric

 

 

Prehistoric animals represent the vast majority of extinct animals.  Thru Paleontological exploration, scientists are slowly piecing together evolution from the fist sea dwelling organisms to present day species.  There will always be much speculation as to what caused the extinction of the dinosaurs.  

Also see: Walking with Dinosaurs

Below is a chart indicating the various eras and periods, as well at the species which were first introduced at the time.

 

Era Cenozoic Mesozoic Paleozoic
Period Quaternary
First Humans

3 to 0 Million Years Ago.  From the Ice Age to the Appearance of the first human beings.

Cretaceous
Dinosaur
Birds
Mammals

144 to 65 Million Years ago.  Last part Of the age of Dinosaurs

Carboniferous
Amphibians
Early Reptiles

360 to 248 million years ago.  Appearance of the  first reptiles (laying their eggs on land).

Tertiary
Dinosaur Extinction

65 to 3 Million Years Ago.  Dinosaurs inexplicably become extinct and mammals and birds become the dominant species.

Jurassic
Dinosaurs
Birds
Mammals

206 to 144 Million Years ago.  This is the high point of the dinosaur age, there are a great number of species including giant plant eaters. Appearance of the first feathered birds.

Devonian
Amphibians
Fish

408 to 360 Million Years Ago.  Appearance of the first amphibious creatures.

Triassic
Dinosaurs
Mammals

248 to 206 Million Years Ago.  Appearance of the The first dinosaurs and the first mammals.

Silurian
Fish

438 to 408 Million Years Ago.  Plants begin to cover the land.

Ordovician
Marine Invertebrates
Fish

505 to 438 Million Years Ago.  The Oceans are teeming with invertebrate life.  Appearance of he first true fish.

Cambrian
Marine Invertebrates

570 to 505 Million Years Ago.  Appearance of the first marine invertebrates.

 

Lists of prehistoric animals

Prehistoric Reptiles
Prehistoric Mammals
Prehistoric Birds
Prehistoric Fish
 

 

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Last modified: May 17, 2002