The initial analysis by Xu "et al." showed that "Xiaotingia" formed a clade with "Archaeopteryx", Dromaeosauridae and Troodontidae to the exclusion of other groups traditionally seen as birds.
A cladistic analysis by Xu and his team showed that "Xiaotingia" formed a clade with "Archaeopteryx", the Dromaeosauridae and the Troodontidae.This clade excludes other birds.
A cladistic analysis by Xu and his team showed that "Xiaotingia" formed a clade with "Archaeopteryx", the Dromaeosauridae and the Troodontidae.This clade excludes other birds.
为简单起见重写这句话: The initial analysis by Xu "et al." showed that "Xiaotingia" formed a clade with "Archaeopteryx", Dromaeosauridae and Troodontidae to the exclusion of other groups traditionally seen as birds. 输出: