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evolution of them!

Brian Koon

on 9 April 2013

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Transcript of Turtles!

Evolution of Let's begin to learn about TURTLES... TURTLES! Many years ago, like over 220 MILLION to be exact, turtles have been tracked to this ancestor... the Eunotosaurus (YOU-note-oh-SORE-us) Research has found that turtles could have mated with other reptiles and crustaceans... 220 million years ago... The Odontochelys has been the earliest ancestor for turtles, recently found by scientists. About 16 in. long and just a few pounds! Very small, toothed beak and soft shell! About 3 ft. long and 50 to 100 lbs. Medium size and has a spiked neck and tail. The Proganochelys was the earliest ancestor of turtles until Odontochelys became discovered. Scientists said this creature was almost indistinguishable from modern day turtles! 210 million years ago... 75 to 65 million years ago... The Archelon is one marine giant! About 12 ft. long and 2 tons! Has leathery shell, and wide, paddle-like legs. The Protostega is the other marine giant! About 10 ft. long and 2 tons! Strong front flippers. It is said that turtles and tortoises' body plan stays relatively the same all the way to modern day turtles and tortoises! 2 million years ago... Colossochelys () About 8 ft. long and 1 ton. Thick, stumpy legs. Meiolania () was thought to be related to Megalania,
a giant monitor lizard. Whoa! About 8 ft. long and 1,000 lbs. Strangely armored head. Carbonemys (car-BON-eh-miss) was said to be the size of a small automobile! 60 million years ago... 165 to 160 million years ago... The Eileanchelys (EYE-lee-ann-KELL-is) 260 to 255 million years ago... BUT! Scientists believe it goes back even further... The Eunotosaurus is believed to be the earliest ancestor
of turtles and tortoises. Some are debating whether it
is more towards "pareiasaur" (kind of reptile). About 1 ft. long and only 2 to 3 lbs. Very small; wide, shell-like ribs. 235 to 225 million years ago... The Henodus (HEE-no-dus) is an example of how evolution has not changed much over time. Look at the similar features that today's turtles have! Puentemys (PWEH-teh-miss) had a peculiarly round shell. This was said to be perfectly round. How was this possible? It was only way to harvest light during day and get rid of extra heat at night! 50 million years ago... Puppigerus (PUP-ee-GEH-rus) is mostly known for its giant eyes. This allowed it to gather in lots of sunlight and hunt tremendously. Broad, flat shell; toothless mouth with beak. About 3 ft. long and 20 to 30 lbs. About 2 ft. long and 5 to 10 lbs. Moderate size; webbed claws! About 10 ft. long and 1 ton. Capacious shell; powerful jaws! About 8 ft. long and 1,000 to 2,000 lbs. Largely round shell! About 3 ft. long and 20 to 30 lbs. Large eyes, flippered front legs. 5 million years ago... Stupendemys (stu-PEND-eh-miss) is the largest freshwater turtle! Yes, it's stupendous! About 9 ft. long and 2 tons! 6-foot-long carapace! Today's TURTLES! Source! http://dinosaurs.about.com/od/otherprehistoriclife/a/Prehistoric-Turtles-The-Story-Of-Turtle-Evolution.htm Created
By Brian
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