Evolution of Monotreme: About 150 million years ago, the first monotreme have evolved. Early fossils of monotreme have been found in Australia. A genus called steropodon is an example.
Evolution of Marsupial: About 150 million years ago, the first marsupial have evolved. A genus called sinodelphys which was about 6 inches long is an example of earliest found extinct genus.
Evolution of Placental mammals: About 110 million years ago, the earliest placental mammal have evolved. The extinct genus eomaia is an example of this. It was only 4 inches long.
Answer:
Evolution of Monotreme: About 150 million years ago, the first monotreme have evolved. Early fossils of monotreme have been found in Australia. A genus called steropodon is an example.
Evolution of Marsupial: About 150 million years ago, the first marsupial have evolved. A genus called sinodelphys which was about 6 inches long is an example of earliest found extinct genus.
Evolution of Placental mammals: About 110 million years ago, the earliest placental mammal have evolved. The extinct genus eomaia is an example of this. It was only 4 inches long.
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