Tabulata and Rugosa are orders of extinct corals that have been taxonomically described for more than 170 years. They were among the main reef builders in the Palaeozoic era (which spanned 541 ...

Learn about the time period that took place 416 to 359 million years ago. 4 min read When the Devonian period dawned about 416 million years ago the planet was changing its appearance. The great ...