Biology Reference
In-Depth Information
FIGURE 7.6
SA1 for the two subdivisions of the man-
dible, analyzed as two parts of a whole. (A) SA for the
two mandibular blocks (Block 1 is shown in black, Block
2 in gray); (B) PC1 for the mandible as a whole.
FIGURE 7.7
SA1 for the two subdivisions
of the mandible, analyzed as two separate
parts.
proxies for the “trophic environment”. To determine whether these trophic variables are
related to shape, Ruber and Adams used PLS and found that specimens with low tooth
counts and a small gape have relatively elongated heads and a forward directed snout
whereas those with high tooth counts and a large gape have deep heads and a ventrally
directed snout. Using phylogenetic generalized least squares (PGLS) analysis, Ruber and
