Paleocirroteuthis

Paleocirroteuthis is an extinct genus of octopuses that lived in the Santonian and Campanian ages of the Late Cretaceous Epoch. It is known from fossilized jaws discovered in Japan and Canada.
It contains two species, P. haggarti, and P. pacifica. Both species, along with the genus, were described by Kazushige Tanabe in 2008.

Etymology

The genus name consists of the Latin word cirrus which is prefixed and suffixed by the Ancient Greek words παλαιός and τευθίς respectively. When combined, they roughly translate to "ancient curly-haired squid".
P. haggarti is named after W. J. Haggart, a contributor to the Cretaceous Nanaimo Group's biostratigraphy, and P. pacifica is named after the Pacific Ocean, where the species was distributed.

Paleocirroteuthis was large, comparable in size to a humboldt squid, as the lower jaw of specimen MCM-A872 had a crest length of, while the lower jaw of a humboldt squid caught off of Baja California, Mexico measures in at a crest length of only.

Paleocirroteuthis is placed in the suborder Cirrina, although its placement within Cirrina is unknown.