Table 1.
Platyrrhine sample with dietary profile.
Fig 1.
) SEM image of the occlusal surface of the right first maxillary (on the left) and first mandibular (on the right) molars of Saimiri sciureus (USNM 546762, Para, Brazil).
a Crests 1–6 are shown. b) Saimiri sciureus (USNM 546762), oblique medial view (above) of right M1–2 and oblique lateral view (below) of P4-M3. The leading edges of eight functional crests are labeled, as are the wear surfaces distal to them. We measured crest lengths 1–6; crests 7 and 8 (associated with the margins of the hypocone and trigonid basin) were not measured. Numbering system of the crests follows Kay [102].
Fig 2.
Laser-scan generated image of Saimiri boliviensis (AMNH 255858) first molars demonstrating calculations for surface relief measures.
See text for calculations. a) and b) oblique lateral view of lower first molar showing cropping at the talonid basin (a) and cemento-enamel junction (b, CEJ); c) upper (top row) and lower (bottom row) first molar in occlusal view with planometric surface area projection depicted to the right.
Fig 3.
Box-and-whisker plots showing ranges of individual values for Diet-1 (3 group comparisons).
a) upper molar SQ, b) upper molar RFI, c) lower molar SQ, d) lower molar RFI, e) lower molar OR.
Table 2.
Species means and standard deviations (SD) for dental indexes.
Table 3.
Sample parameters for M1 and M1 occlusal variables grouped by diet.
Table 4.
Results of post-hoc multiple pair-wise comparisons between tooth indices (Wilcoxon each pair) segregated by diet categories.
Table 5.
Summary of correct classification rates for discriminant function analyses using upper molar (M1), lower molar (M1), and upper and lower molar occlusal variables combined.
Fig 4.
Plot of a discriminant function analysis including M1 length, RFI, OR, and phylogenetically corrected SQ and M1 RFI and phylogenetically corrected SQ.
93.6% of variance is accounted for by discriminant function 1 and 6.4% by function 2. Polygons are drawn to include all individual specimens.