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The skeletal remains, which include skulls without mandibles, craniums, loose mandibles and maxilla fragments, were handed over in an official ceremony in Vienna on Tuesday, where there was a panel and presentation.

By contrast, we see the upper jaw — the maxilla — as a fixed part of the skull that simply holds the upper teeth.

The practice of mewing involves keeping the tongue on the roof of the mouth, the maxilla.

Using high resolution micro-CT scanning, Dr. Weber created a 3D replica of the upper left maxilla that allowed him to investigate its surface features and, virtually, to remove enamel from the teeth.

Qilinyu had three bones, the dentary, maxilla and premaxilla, that characterize the modern vertebrate jaw seen in bony fish, amphibians, reptiles, birds and mammals, though they are absent in the cartilaginous sharks and rays.