Quoting Mike Taylor <mike@miketaylor.org.uk>:
This way, if _Mamenchisaurus_ and _Omeisaurus_ are found to be paraphyletic relative to 'higher' sauropods, the clade self-nullifies.
Ye-es. I think it's a matter of philosophy whether you like such magic disappearing clades or not. I am not personally wild about them.
Why on earth not?
Nick Pharris Department of Linguistics University of Michigan