Guadalupian - the second of the three epoches of the Permian, it lasted from about 270 to 260 million years ago. This epoch saw coral reefs flourishing in shallow seas, and on land the replacement of the Pelycosaurs by early Therapsids. The Permian is a geologic period that extends from about 280 to 248 million years before the present (mya). ... The pelycosaurs were smallish to large (upto 3 meters or more) primitive Late Paleozoic synapsid reptiles. ... Groups Biarmosuchia Dinocephalia Anomodontia Theriodontia    Cynodontia       (...mammals) Therapsids, previously known as the mammal-like reptiles, are a group of synapsids. ...

The Permian is a geologic period that extends from about 280 to 248 million years before the present (mya). ... Jump to: navigation, search Cisuralian is the first of the three epoches of the Permian. ... Lopingian is the third of the three epoches of the Permian. ... Jump to: navigation, search In the geologic timescale, the Asselian is the age of the Cisuralian epoch of the Permian period of the Paleozoic era of the Fanerozoic eon that is comprehended between 299 million and 294 million 600 thousand years ago, approximatedly. ... Jump to: navigation, search In the geologic timescale, the Artinskian is the age of the Cisuralian epoch of the Permian period of the Paleozoic era of the Fanerozoic eon that is comprehended between 284 million 400 thousand and 275 million 600 thousand years ago, approximatedly. ... Jump to: navigation, search The Capitanian is a stage on the geologic time scale occuring from 265. ... The Paleozoic is a major division of the geologic timescale, one of four geologic eras. ... The Cambrian is a major division of the geologic timescale that begins about 542 million years before the present (BP) at the end of the Proterozoic eon and ended about 490 million years BP with the beginning of the Ordovician period. ... The Ordovician period is the second of the six (seven in North America) periods of the Paleozoic era. ... The Silurian is a major division of the geologic timescale that extends from the end of the Ordovician period, about 439 million years ago (mega years ago, mya), to the beginning of the Devonian period, about 408. ... Jump to: navigation, search Disambiguation: Devonian is also an adjective relating to the English county of Devon or the people there. ... Jump to: navigation, search The Carboniferous is a major division of the geologic timescale that extends from the end of the Devonian period, about 359. ... The Permian is a geologic period that extends from about 280 to 248 million years before the present (mya). ...