By the early 21st century, vertebrate paleontologists were beginning to adopt phylogenetic taxonomy, in which all groups are defined in this kind of way as being monophyletic; that is, groups which incorporate all descendants of a particular ancestor. The reptiles as historically outlined are paraphyletic, considering that they exclude each https://reptilesforsalescotland89886.madmouseblog.com/4185019/reptiles-kingswinford-no-further-a-mystery