Transitional Middle Ear (IMAGE) American Museum of Natural History Caption Liaoconodon hui skull from the ventral side showing (l to r) the bony ring that holds the ear drum, ossified Meckel’s cartilage, and the lower jaw Credit Meng, et al 2011 (<i>Nature</i>) Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.