From David Marjanovic:
what about sticking pan- in front of your stem groups, which are really easy to define, and using the traditional names (Aves, Crocodi/ylia....) for > something else? Panornithes ("all birds"), Pancrocodilia ("all crocs"), Panarchosauria, Panamniota...?
Would end many quarrels with others, wouldn't it? And maybe something like neo- for crown groups? (Okay, Neosauropoda isn't exactly...)
Tim
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