Planet News

New Bird-Like Dinosaur Related to Archaeopteryx

Three Feathered Tyrannosaurs Discovered

Woolly Mammoth DNA Adapted for Ice Age Survival

Rare Find: Three New Dinosaurs From Australia

Flute Belonged to Early Humans

Jurassic Dino Provides Clues to Bird Wing Evolution

Hobbit-Like Human Ancestor Found

Evolution Can Occur in Less Than Ten Years

Gigantic Trilobite Fossils Found in Portugal

Woolly Mammoth DNA Sequenced








PLANET NEWS

Fossil Link in Evolution of Slimy Things

Bookmark and Share

The evolution of many groups of animals are wonderfully well represented in the fossil record. Others, like frogs, are less understood simply because few fossils exist of these creatures and their ancestors.

Recently a team of scientists from the University of Calgary described a new fossil amphibian which helps bridge a gap in the evolution of frogs, toads, and salamanders. The fossil seems to belong to a known group of primitive amphibians. However, this new fossil also shares many traits of modern amphibians.

For example, the number of bones in the spine of Gerobatrachus hottoni is exactly in between the number of bones found in the backs of primitive amphibians and frogs and salamanders living today.

“With this new data our best estimate indicates that frogs and salamanders separated from each other sometime between 240 and 275 million years ago, much more recently than previous molecular data had suggested,” says Robert Reisz of the University of Toronto Mississauga.

Source: Nature.com and University of Calgary
Illustration by Michael W. Skrepnick

Related Links:
http://www.nature.com/nature

Bookmark and Share

Planet Store
Dinosaur Coprolite (Dung) (Tumbled) (1 pound bulk)
Dinosaur Coprolite (Dung) (Tumbled) (1 pound bulk)   
Tyrannosaurus rex, model with moving jaws, standing pose
Tyrannosaurus rex, model with moving jaws, standing pose   
Spinosaurus, model with moving jaws
Spinosaurus, model with moving jaws   
Microscope, stereo, bench & field
Microscope, stereo, bench & field   
Planet Store

Geologic History of West Virginia
Free Book Download on the West Virginia Fossil Club website:
Geologic History of West Virginia by Dudley H. Cardwell (1977)
>> Download the Book