> Birds aren't that big of an addition. Just like calling all mammals > cynodonts. It's more like calling all mammals eupelyco_saurs_ (which I don't like either) and like taking the "pelycosaurs" out of Reptilia. Also, I forgot to mention, I was starting from pre-cladistic Bakkerism. Adding all Dinosauria to Reptilia is quite a big addition IMHO.