Status: EXTINCT. Permian period.
Biology and Reproduction: It is a member of the Holocephali, the group that includes chimaeras and ratfish.
According to Assistant Curator Ken Angielczyk back in 2012:
“Over the past couple of days, we found some very impressive teeth specimens that belong to a little-known but still existing group of sharks called the Holocephali. They’re known by several common names, including ratfish and chimeras. The latter name is especially fitting because members of the Holocephali often look like amalgamations of other sharks and bony fish. Most chimeras in the modern biota live in deep ocean waters and are of limited economic importance, so they are infrequently seen by the general public”.