4 min read When the Devonian period dawned about 416 million years ... jaws lined with bladelike plates that acted as teeth. Early placoderms fed on mollusks and other invertebrates, but later ...

During this period, novel structures such as tracheids ... As a predominant and typical component of Early Devonian floras, Zosterophyllopsida has a long history of research and has been widely ...

Now, the discovery of an older species, Palaeospondylus australis, from Early Devonian rocks in ... hinting at a global distribution during the Devonian period. The intricate honeycomb-like ...