how does octopus differ from dinosaurs explain their evolutionary relationships
Answers
Explanation:
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Answer:
The oldest known octopus fossil belongs to an animal that lived some 296 million years ago, during the Carboniferous period. In other words, long before life on land had progressed beyond puny pre-dinosaur reptiles, octopuses had already established their shape for the millions of years to come.
The evolution of Sauropod dinosaurs
they go back 250 million years, even older than theropods. That makes octopodes rather young, which shouldn’t be a big surprise. It’s like talking about dinosaurs and birds. Theropods remained and continued to evolve and became our modern birds. That makes birds related to dinosaurs, they are a member of the dinosaur family, but they are not the dinosaurs that were present in the Jurassic and Triassic ages.
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There is only one Octopus that predates dinosaurs: Pohlsepia mazonensis, beating the dinosaurs by 80 million years.
But there’s a 140 million year gap between them and what are definitely octopus, Proteroctopus in the late Jurassic
Pohlsepia mazonensis is the earliest described octopod, originating from the late Carboniferous period. The species is known from a single exceptionally preserved fossil discovered in the Pennsylvanian Francis Creek Shale of the Carbondale Formation, north-east Illinois, United.
Cephalopods have existed for 500 million years from the Cambrian and octopus ancestors were in the Carboniferous seas 300 million years ago. The oldest known octopus fossil is Pohlsepia, which lived 296 million years ago. Dinosaurs first appear about 240 million years ago, so the octopus, squid and its relatives are much older.
The oldest known fossil of an octopus was from the late Cambrian, 166 millions years ago. The octopus and its relatives (squid) were well split from a common ancestor 100 to 160 million years ago. The octopus and its relatives, squid are still with us.
Dinosaurs appeared 247 t0 204 million years ago and went extinct 65 million years ago.
There were also cephalopods all the way back to 500 million years ago, long before dinosaurs, but they are NOT our modern cephalopods. There were no octopods. 500 million years ago Cephalopoda looked like this:
