are actually a distinct phylum of marine animals that first appeared during the early Cambrian period, approximately 540 million years ago. These shelled creatures reached their peak diversity during ...

These creatures first appeared during the early Cambrian period over 540 million years ago and were among the most abundant and diverse marine animals throughout the Paleozoic Era. Although their ...

Therapsids, the ancient relatives of mammals, once roamed Earth in great numbers during the middle to late Permian period ... animals, with only mammals surviving today. During the late Paleozoic ...

Visitors at the Miraculous Life in the Ancient Oceans: Exhibition of Premium Fossils from the Cambrian Chengjiang Biota, held at the Natural History Museum of China in Beijing. WANG QIAN/CHINA ...

"This discovery allowed researchers to learn how these primitive plants evolved and reproduced during the Carboniferous Period, at the end of the Paleozoic Era," said Pedro Correia, according to ...

Unlike the other plants and animals on this list ... Since the monoplacophorans of the Paleozoic Era lay at the root of mollusk evolution, these living species have a lot to tell us about this ...

Known as the Great Dying, the mass extinction that ended the Permian geological period was the worst of ... and there weren’t many plants or animals that could do that.” A key reason the ...

But in the oceans of the Paleozoic era more than 400 million years ago, animals known popularly as ... of eurypterids peaked in the Silurian period, which started about 444 million years ago ...

Basal tetrapods were animals ... period, around 307 million years ago. The nearly-complete skeleton, with a fanged, diamond-shaped head half a metre wide, was discovered in rocks from the Early ...

“The Permian was the last period of the Paleozoic Era. “Dinosaurs lived during the ... predominantly formed from decomposing plants and animals, mainly microorganisms like phytoplankton ...

The skin sample dates to the early Permian Period, between 289 million years ... is the first-known skin-cast fossil from the Paleozoic Era. The other fossils included skin compressions, skin ...