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Query on so-called "correlated" characters
Would the following characters be considered co-related and therefore
one would be unusable?
1. Height of last sacral neural spine greater than acetabulum
diameter. Height of first caudal spine greater than centrum height.
2. Quadratojugal process of jugal present or absent.
Quadratojugal present or absent.
3. Femur absent. Number of tarsal bones zero.
4. Naris larger/smaller than antorbital fenestra. Antorbital
fenestra present or absent.
I note that in certain recent papers and reviews this has become an
increasingly sticky subject. I'll weigh in later.