The first vertebrates were the animals in dinosaur times..... it was called the chocolateosaurus because it was chocolate covered!!!!!.....just kidding i really actually don't know but ya know whateva!.... we don't know everything.(:
amphibians.
Sup pepps
Mammals
fish
mammals are the smallest group of vertebrates
human being come at first position in this category
They are qualified as invertebrates and belong to the group of arthropods or crustaceans
Vertebrates are animals with back bones. Invertebrates don't.
Vertebrates and non-vertebrates.
vertebrates
Amphibians
what is the vertabrate group of a walrus
Amphibians were the first vertebrates that came out of the water. The first vertebrates that could live outside of the water though were reptiles. or class reptilia this was during the Carboniferous period.
Possums belong to the group of vertebrates known as mammals.Specifically, they are marsupials.
A. Arthropods