Cockroach dating fossil history million

Charles Darwin himself coined the term "living fossil" while observing the platypus.

Native to eastern Australia, the animal is the only surviving example of its family, Ornithorhynchidae.

This group of animals is believed to have split from mammals some 166 million years ago.

The horseshoe crab could hold the distinction of being the oldest animal species still in existence.

This is case for small cockroaches from the forests of New Caledonia, an island about 3,000 kilometres off Australia’s east coast.

Despite being different from Western home species, these cockroaches are still mere bugs that seem quite insignificant.

But a few species studied during our exploratory field work in the late 1990s have revealed an outstanding story about this amazing island.

The study of these fossils has facilitated important contributions to biostratigraphy, paleontology, evolutionary biology, and plate tectonics.The first appearance of trilobites in the fossil record defines the base of the Atdabanian stage of the Early Cambrian period (), and they flourished throughout the lower Paleozoic era before beginning a drawn-out decline to extinction when, during the Devonian, all trilobite orders except the Proetids died out.Trilobites disappeared in the mass extinction at the end of the Permian about By the time trilobites first appeared in the fossil record, they were already highly diversified and geographically dispersed."Living fossil" discovered in SW China Experts recently discovered around 1200 Chinese Hynobiidaes in Guiding county Southwest of China's Guizhou province.These are a type of amphibian species around 300 million years old that once used to live in the dinosaur period. July 21, 2006 Salamander Origins Pegged To Asia National Geographic News 3/28/2001.

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