[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index][Subject Index][Author Index]
Re: Morphological dating
The change in rate at Eumaniraptora is annoyingly post hoc.
Yes. Apparently they used a constant rate for Eumaniraptora and another
constant rate for the rest of the tree -- neither theoretically defensible
nor necessary in practice, considering molecular dating programs like r8s,
PATHd8 or (shudder) Multidivtime.
I'd like to see this "morphological clock" tested with living animals,
compared to their molecular clocks, before I put any weight in using the
method for extinct animals.
Promised for my thesis. :-) Unless the rest takes too long, as an amniote
phylogeny by a perfectionist like me just might -- if it doesn't become very
clear very soon that it's turtles all the way down.