it was the Crassigyrinus it was aguatic and had sharp teeth. == ==
dimetrodon was the dominANT SPECIES OF THE permian period
dinosaurs
Metazoans were abundant during the Vendian Period.
During the Tertiary period, dominant organisms included early mammals, large birds, marine mammals like whales and dolphins, and diverse plant species. This period saw the rise of modern mammals, along with the evolution of grasslands, forests, and flowering plants. The Tertiary period also saw the decline of dinosaurs and the rise of more familiar animal groups.
The dominant organisms during the carboniferous time period were plants. They were large, vascular, land plants that sometimes grew to be one hundred feet or more.
dimetrodon and edaphosaurus
During the Jurassic Period, dominant organisms included dinosaurs such as Brachiosaurus, Stegosaurus, and Allosaurus. Other notable organisms included pterosaurs, marine reptiles like ichthyosaurs and plesiosaurs, and early mammals. The flora was dominated by conifers and ferns.
The dominant organisms in the Triassic period were reptiles, particularly archosaurs such as early dinosaurs, crocodiles, and other related species. These organisms played a key role in shaping the ecosystems of the time and were able to adapt to a wide range of environments, from deserts to wetlands. Additionally, marine reptiles like ichthyosaurs and placodonts were also prevalent during this period.
During the Tertiary Period the dominant organisms were mammals. These mammals included the many different types of dinosaurs that were roaming the earth 65 million years ago. Other organisms included bony fish such as bass and trout, flowering plants, insects, and birds.
The T-Rex and the Spinosaurus.
Late Horizon
dinosaurs among animals on land and gymnosperms among plants