Relatively advanced cotylosaurs (Cotylosauria, ‘stem reptiles’), distinguished from the lower types by their shorter jaws and better jaw movement. These anapsids (Anapsida) lived in the Triassic and Permian.
科学参考收录了60776条科技类词条,基本涵盖了常见科技类参考文献及英语词汇的翻译,是科学学习和研究的有利工具。