The Fukui Prefectural Dinosaur Museum (Katsuyama City) announced that it was the first in the world to elucidate the internal structure of whale ossicles using computer tomography (CT). Until now, detailed comparisons with other common mammals have not been made, but this study revealed that they have a basic structure common to mammals.

The ossicles of cetaceans are a few centimeters long and are also used to classify species due to their different shapes, but some researchers misunderstood that they were easily detached from the skull and turned upside down. Hiroto Ichishima, chief of the research and exhibition section of the museum, said, “It is significant that the correct structure was found. It will be the basis for studying the evolution of whales that have changed from terrestrial to aquatic.”