What was the Ordovice period?

The

Ordovice period is the second geological period in the Palaeozoic era, which has the last 542 million years of life on Earth, during which complex multicellular organisms appear in fossil record. The Ordoviku period extends 490 to 440 million years ago. It is preceded by the Cambrian period, followed by the Silurian period. During this period, the Earth's biosphere was built on evolutionary successes from the Cambrian period. The number of sea fauna genera increased four times and at the end of the Ordovice period exploded the intensity and diversity of bioerod organisms, which led to a less well -preserved fossil than before.

During the Ordoviku period, marine life dominated. There were simple plants and mushrooms on the ground, but not much. The southern continents were aggregated to a supercontinent called Gondwan, who started near the equator and eventually moved to cover the South Pole. The seabed was relative and shallow, allowing many marine organisms to grow. Eupterids, a huge water scorpion whose closestThe more living relative is a horseshoe box, they were among the most feared predators on Earth at that time. The largest types of eupterids, pryrygotus , was the largest Arthodod that has ever lived, up to 2 m in length. Arthopodes were generally the largest organisms during Ordovik.

trilobites were present in large numbers, although their diversity was seriously limited by the extinction of the order separating the Ordovica period and the Cambian period that appeared before it. This extinction erased about half of all sea fauna genera, including the first Apex predator, anomalocaris , "strange shrimp". The ammonists were numerous in the oceans, while the organisms for building cliffs were well introduced.

Soon vertebrates existed during the peroidal peroid, but were not numerous. Originally developed during the Cambrian period. These were simple fish, most prominently without jaw (Agnathan), some similarDu as tubular lamps, others more similar to appearance as modern fish. Fish began to evolve during this period.