Tag Archives: permian

Paleontologists have uncovered seven well-preserved teeth from the extinct shark genus Petalodus in Shanxi province, China. Life restoration of Petalodus sharks. Image credit: Dinghua Yang. Petalodus is a small genus of Petalodontiformes, a intriguing group of extinct marine cartilaginous fish that flourished from the Carboniferous to the Permian period. First …

The ancestors of both mammals and birds became warm-blooded at the same time, some 250 million years ago, in the time of the end-Permian mass extinction, according to new research from the University of Bristol. Posture shift at the end of the Permian period, 252 million years ago. Before the …

Coal-Burning Contributed to End-Permian Mass Extinction An international team of geologists has found the first direct evidence that volcanic eruptions in the southern part of the Siberian Traps region 252 million years ago burned large volumes of coal and vegetation. Elkins-Tanton et al demonstrate that the volume and composition of …

CT scans of the fossilized skull of Dwykaselachus oosthuizeni — a shark-like fish that lived during the Permian period, around 280 million years ago — reveal the origin of chimaeras, a group of cartilaginous fish related to sharks. The research appears today in the journal Nature. Reconstruction of the early …