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Permian
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Permian

Period of geological time 290–245 million years ago, the last period of the Palaeozoic era. Its end was marked by a dramatic change in marine life – the greatest mass extinction in geological history – including the extinction of many corals and trilobites. Deserts were widespread, terrestrial amphibians and mammal-like reptiles flourished, and cone-bearing plants (gymnosperms) came to prominence. In the oceans, 49% of families and 72% of genera vanished in the late Permian. On land, 78% of reptile families and 67% of amphibian families disappeared.
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At the end of the Permian period about 251 million years ago, a mass extinction claimed more than 90 percent of ocean species and 70 percent of those on land (SN: 2/1/97, p.
Fungi survived extinction event; study suggests abundant microfossils ... by Perkins, Sid / Science News
Geological records show that there was a massive spike in the population of Reduviasporonites across Pangea as the Permian period came to an end.
World's forests were wiped out in global catastrophe 250 mln yrs ago by Asian News International
The oldest known rostroconch fossils are of early Cambrian age (about 520 million years old) and the last members of the lineage died out before the end of the Permian Period around 255 million years ago.
Head down in the Paleozoic sea; this may be how one clam-like mollusc ... by Rudkin, Dave / ROM Magazine
 
 
 
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