Boyer diss 2009 1046..

The canine is a simple, single-rooted tooth with a slight “metacone” heel, distal to
its main, paracone cusp. It measures 1.26 mm in length and 0.89 mm in buccolingual
width. It is separated from I 2 by a substantial diastema of 2.46 mm. The P 2 follows the C
by another diastema of 1.54 mm. It is also a simple tooth, but with two roots and
comprised of a large paracone, a lingual swelling that could be called a “protocone lobe,”
and a distal swelling that represents a “metacone lobe.” It measures 1.47 mm in
mesiodistal length and 1.25 mm in buccolingual width. The P 3 follows P 2 directly. It is
more complex, with three roots, paracone, possibly a metacone as well as parastyle and
paraconule. It measures 1.79 mm in mesiodistal length and 2.23 mm in buccolingual
width. P 4 follows P 3 directly. It is more complex yet, again with three roots, paracone,
possibly a metacone, protocone, a parastyle and paraconule. It measures 2.02 mm in
mesiodistal length and 3.09 mm in buccolingual width. There is uncertainty about the
presence of a metacone on P 3-4 because of extensive wear developed on these cusps.
Diagnostic details of the molars are difficult to discern. HRxCT reconstructions suggest,
however, that they lack mesostyles (Fig. 2.2C), as is true of other plesiadapids more
primitive than P. rex (admittedly many P. rex individuals lack identifiable mesostyles).
M 1 measures 2.82 mm in length and 4.06 mm in width. M 2 is 2.79 mm by 4.26 mm. M 3 is
2.60 mm by 3.93 mm. Fox (1991) noted that lower molars of Pr. gaoi described by Fox
(1990a) are in the range of sizes exhibited by molars of P. rex. The dimensions of the
upper molars of UALVP 46685 are in the low end or outside of the range of molar sizes
known for P. rex from Cedar Point Quarry (Gingerich, 1976) and thus suggest that this is
a small individual of Pr. gaoi. Alternatively, this specimen may indicate that larger
samples of Pr. gaoi upper dentitions will demonstrate the species to be smaller, on
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