Dinosaur and Paleontology Dictionary
Archelon swam using its paddle-like flippers.
WHEN ARCHELON LIVED
Archelon lived during the late Cretaceous period.
DISCOVERY OF FOSSILS
Archelon lived in the seas in what is now North America; fossils have been found in Kansas and South Dakota, USA.
Archelon belonged to the Class Reptilia (reptiles), Order Chelonia (turtles, tortoises and terrapins), Suborder Cryptodira, Family Protostegidae (sea turtles from the late Cretaceous period with flippers and minimal shells), Genus Archelon.
The earliest turtles belonged to the family Proganochelyidae, primitive tortoises that lived during the Triassic period, evolving about 215 million years ago.
Archelon, other turtles (chelonians), and reptiles may have descended from captorhinids, primitive anapsids that lived during the Early Carboniferous period, about 340 million years ago and went extinct at the end of the Triassic period, about 250 million years ago. Captorhinids They had four sprawling legs and a long tail and evolved from amphibians.
(and Other Prehistoric Creatures)
For brief dinosaur fact sheets, click here.
Over 35,000 Web Pages
Sample Pages for Prospective Subscribers, or click below
Overview of Site|
Enchanted Learning Home
Monthly Activity Calendar
Books to Print
Parts of Speech
The Test of Time
TapQuiz Maps - free iPhone Geography Game
Biology Label Printouts
Physical Sciences: K-12
Art and Artists
Label Me! Printouts
|Search the Enchanted Learning website for:|