Editing Phanerozoic (section)

====Devonian Period====
{{Main|Devonian}}
[[File:Ostracoderm digital recreation..jpg|thumb|left|''[[Cephalaspis]]'', a jawless fish]]
The Devonian spans from 419 million to 359&nbsp;million years ago. Also informally known as the "Age of the Fish", the Devonian features a huge diversification in fish such as the jawless [[conodont]]s and [[ostracoderm]]s, as well as jawed fish such as the armored [[placoderm]]s (e.g. ''[[Dunkleosteus]]''), the spiny [[acanthodian]]s and early [[bony fish]]. The Devonian also saw the primitive appearance of modern fish groups such as [[Chondrichthyes|chondricthyan]]s ([[cartilaginous fish]]) and [[osteichthyan]]s (bony fish), the latter of which include two [[clade]]s — the [[actinopterygian]]s ([[ray-finned fish]]) and [[sarcopterygian]]s ([[lobe-finned fish]]). One lineage of sarcopterygians, [[Rhipidistia]], evolved [[Tetrapodomorpha|the first four-limbed vertebrates]], which would eventually become [[tetrapod]]s. On land, plant groups diversified after the [[Silurian-Devonian Terrestrial Revolution]]; the first [[woody plant|woody]] ferns and the earliest [[seed plant]]s evolved during this period. By the Middle Devonian, shrub-like forests existed: [[Lycopodiophyta|lycophytes]], [[Equisetales|horsetails]] and [[progymnosperm]]. This [[greening]] event also allowed the diversification of [[arthropod]]s as they took advantage of the new habitat. Near the end of the Devonian, 70% of all species became extinct in a sequence of mass extinction events, collectively known as the [[Late Devonian extinction]].<ref>{{cite web|url=http://www.ucmp.berkeley.edu/devonian/devonian.php|title=Devonian|author=University of California|work=University of California|url-status=live|archive-url=https://web.archive.org/web/20120511155551/http://www.ucmp.berkeley.edu/devonian/devonian.php|archive-date=11 May 2012}}</ref>