Viktor Radermacher Reconstruction: Artist's Reconstruction of Important Alvarezsaur Species (image) University of the Witwatersrand Share Print E-Mail Caption From left to right: Haplocheirus, Xiyunykus, Bannykus, and Shuvuuia. Note the lengthening of the jaws, reduction of the teeth, and changes in the hand and arm. Credit Viktor Radermacher Usage Restrictions None Share Print E-Mail 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.