Oldest-known octopus relative lived 328 million years ago and had 10 arms

March 8, 2022

https://www.cnn.com/2022/03/08/world/oldest-octopus-ancestor-fossil-scn/index.html

That would be the well-known decapuss…

From the article liked in the originating post:

"This is the first and only known vampyropod to possess 10 functional appendages," said study author Christopher Whalen

AND

"Researchers have named the previously unknown species Syllipsimopodi bideni after US President Joe Biden."

Translation: the only known fossil of an octopus birth defect and they name it after Joe Biden.