Pohlsepia Reclassified as Nautiloid
Fossil discovered in Illinois, described in 2000.
Evidence suggests octopus origin pushed back by 150 million years.
Synchrotron imaging found 11 teeth matching Paleocadmus.
Reclassification removes Pohlsepia from Guinness records.
Extends nautiloid record back by 220 million years.
Cephalopod family tree shows octopuses appeared later in the Jurassic.
2 days ago