Boyer diss 2009 1046..

tricuspidens, P. n. sp. and N. intermedius specimens. A post-hoc test [Tukey’s honestly
significant differences (HSD)] of means shows that they are not significantly different. If
larger samples, or samples in which digit positions could be more carefully standardized,
were to show P. cookei to have significantly narrower claws than other plesiadapids, this
would be consistent with the previous interpretation that it was more committed to an
arboreal way of life than these other plesiadapids (Bloch and Boyer, 2007). On the other
hand the claws of P. churchilli are significantly wider than those of P. cookei and N.
intermedius (P=0.0003 and P=0.01, respectively). The one claw of Pr. gaoi is also
relatively wide, like those of P. churchilli, and looks more like those of scansorial or
terrestrial animals.
Innominate
Description.—Both innominates are preserved with UM 87990 (Table 4.16; Fig.
4.23). Both are fragmentary and distorted in different ways, but consideration of both
sides allows a view of the complete element. The ilium is the longest of the three bones
comprising the innominate. It forms the superior margin of the acetabulum and then
tapers in its cross-sectional dimensions superiorly. The posterior margin begins to flare
as the posterior inferior iliac spine is reached. This is also the beginning of a roughened
facet for the ala of the sacrum, the auricular facet. The anterior surface also flares
slightly as the auricular facet is approached, but there is no distinct spine associated with
its beginning. A sharp crest runs superoinferiorly between the posterior and anterior
surfaces of the ilial shaft. The crest starts at the anterior inferior iliac spine (a small raised
roughened area, just superior to the acetabulum) and runs to the anterior superior iliac
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