-
Characteristic arthropods of the Cambrian period.
-
It has 6 periods and ranges from the appearance of animals with shells or exoskeletons, to the emergence of the first amphibians and reptiles. It ends with the most brutal extinction ever: the Permian-Triassic mass extinction.
-
The diversification of invertebrate animals occurs, appearing the first animals with shells, the first crustaceans and the first corals.
-
There was a great abundance and variety of mollusks
-
Great adaptive radiation, especially marine fauna.
It is believed that some were able to reach the shores, but still unable to become independent from the sea.
The only plants that colonized the earth were non-vascular plants (green algae). -
First vertebrates are armored fish, with bony plates in the front of the body.
-
The conquest of the emerged lands begins. Vascular plants and terrestrial arthropods manage to colonize the mainland.
The atmosphere reaches 21% O2, as it is today because of the invasion of plants on the earth.
The first vertebrates appear. -
The fish begin to leave the water in search of resources, giving rise to amphibians.
-
The first freshwater fish, and trees appeared and the first amphibians emerged from fish that could resist out of water.
The increased concentration of O2 in the atmosphere allowed the ozone layer to be created. -
The terrain is covered with gymnosperm vegetation, which would later give way to large forests
-
The first reptiles appear.
Development of the first amniotic membrane, which allowed animals to become independent from water.
Gymnosperms emerged, with specialized reproductive structures, such as seeds and pollen. -
The supercontinent called Pangea was formed, which would later be divided into the continents that we know today
-
The supercontient Pangea was formed which, together with the great volcanic activity, significantly increased the greenhouse effect.
Many mountain ranges were formed. (hercynian orogeny)
Insects evolve to their current appearance, conquering the air, reptiles diversify.
It ends with the greatest extinction our planet has ever seen:
Permian-Triassic Mass Extinction -
Dinosaurs and mammals appear
-
It has 3 periods. Dinosaurs and reptiles were the dominant of the Era. It ended with the impact of a meteorite that caused a great extinction.
-
The first dinosaurs appeared on earth, generally bipedal and carnivorous, as well as the first mammals (from the mammalian reptiles).
-
Dinosaurs now conquer air and water and the first birds appear
-
The fracture of the Pangea Supercontinent began.
The large reptiles proliferated and diversified they conquered the land, the sea and even the air. Plants without flowers dominated the land and the first birds appeared. -
The first flowering plants appear
-
Dinosaurs and mammals became even more diversified.
Relatively warm climate, leading to high sea levels. New types of mammals, birds, and flowering plants appeared.
This period ended in the so-called K-Pg Event, which is suspected to have consisted of the fall of a meteorite in the Yucatan Peninsula. The event caused the extinction of dinosaurs and many other species. -
The fall of a meteorite causes extinction of dinosaurs along with many other species, proclaiming mammals as new leaders of the earth.
-
It has 2 periods, the latter reaches the present time. It is characterized by the evolution of mammals and the appearance of man.
-
Mammals diversified and evolved rapidly to become large herbivores and carnivores. Pangea fragmentation completed.
Bird's number of species increased, they quickly became carnivores.
New marine species and first species similar to primates emerged (apes). -
The homo genus evolves conquering, in its path, all the continents already formed
-
Mammalian specialization. Appearance of primates and man (hominins).
There was the diversification of the genus Homo.
Man conquers all continents.
Ice ages occur.
