Permian Period.
dimetrodon and edaphosaurus
Dimetrodon was a species of synapsid that roamed the Earth, during the Early Permian era. It had a large sail on it's back that may have been used for regulating body temperature. It was an apex predator and may have preyed on Edaphosaurus.
Dimetrodon live in the Permian period, which was before the dinosaurs.
You could be talking about spinosaurus, which had a large fan shaped portrusion coming out of its back, or you could be talking about the permian early reptiles, dimetrodon and edaphosaurus. Neither of which were dinosaurs.
The Dimetrodon first appeared in the Paleozoic era, which held the Permian period.
dimetrodon was the dominANT SPECIES OF THE permian period
The Permian Period,248 million years ago, was the largest extinction period on Earth. Ninety to ninety-five percent of marine species were eliminated, including fusulinid foraminifera, trilobites, rugose and tabulate corals, blastoids, acanthodians, placoderms, and pelycosaurs. Numbers of sharks and bony fish were drastically reduced during this period.
Dimetrodon is an extinct genus of predatory synapsids containing about 15 species.
Dimetrodon was a mammal-like reptile that lived during the Permian period, which was before the dinosaurs came. It had a large saill on its back, probably to warm its body up. It walked on 4 legs and hd a tail.
Dimetrodon genus (and specially the Dimetrodon limbatus species) went extinct around 40 My before the appearance of the first dinosaur during the Triassic period of the Mesozoicera.Spinosaurusgenus appeared only during the Late Jurassic.There is no possible direct genetic connection between Spinosaurus(a dinosaur therapod) and Dimetrodon (a synapsid mammelian reptil that left no descendents after the «Great Dying», the Permian mass extinction).
Dimetrodon belongs to a group of reptiles that later evolved into mammals. Some of these reptiles were said to be poisonous. However, no suggestions have been made about dimetrodon being able to "spit" poison like a sppiting cobra. It´s likely it didn´t inject poison because otherwise scientist would have found hollow fangs like in the case of venomous snakes. It´s quite possible that dimetrodon´s mouth was full of deadly bacteria, like in the case of komodo dragons and crocodiles, which would be just as deadly.
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