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De Vries et al. 2024 Prosimian premolars (p4s) Project ID: 000552618 Public
236 Media · 118 Specimens · Creator: Dorien de Vries · Managed by: Dorien de Vries

This study tests whether 1) premolar topography of extant “prosimians” (strepsirrhines and tarsiers) successfully predicts diet, and 2) whether the combination of molar and premolar topography yields higher classification accuracy than using either tooth position in isolation. Dental topographic metrics (ariaDNE, RFI, OPCR) were calculated for 118 individual matched-pairs of mandibular fourth premolars (P4) and second molars (M2). The sample represents 7 families and 22 genera. Tooth variables were analyzed in isolation (P4 only; M2 only), together (P4 and M2), and combined (PC1 scores of bivariate principal component analyses of P4 and M2 for each metric). Discriminant function analyses were conducted with and without a measure of size (two-dimensional surface area). When using topography only, “prosimian” P4 shape predicts diet with a success rate that is slightly higher than that of M2 shape. When absolute size is included, premolars and molars perform comparably well. Including both premolar and molar topography (separately or combined) improves classification accuracy for every analysis beyond considering either in isolation. Classification accuracy is highest when premolar and molar topography and size are included. Our findings indicate that molar teeth incompletely summarize the functional requirements of oral food breakdown for a given diet, and that the mechanism selecting for premolar form is more varied than what is expressed by molar teeth. Finally, our findings suggest that fossil P4s (in isolation or with the M2) can be used for meaningful dietary reconstruction of extinct primates. Article DOI: 10.1002/AJPA.24995

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  ID Part Object Taxonomy Type Date Added Publication Status  
000561117 lower p4 (cast) NHMUK:ZOO:1948.191 Phaner furcifer Mesh 2023-09-17 Open Download  
000561113 lower second molar (cast) NHMUK:ZOO:1948.191 Phaner furcifer Mesh 2023-09-17 Open Download  
000558398 lower p4 (cast) USNM:MAMM:USNM 481739 Perodicticus potto Mesh 2023-09-12 Open Download  
000558396 lower second molar (cast) USNM:MAMM:USNM 481739 Perodicticus potto Mesh 2023-09-12 Open Download  
000558391 lower p4 (cast) USNM:MAMM:USNM 465895 Perodicticus potto Mesh 2023-09-12 Open Download  
000558390 lower second molar (cast) USNM:MAMM:USNM 465895 Perodicticus potto Mesh 2023-09-12 Open Download  
000558384 lower second molar (cast) amnh:mammals:52692 Perodicticus potto ibeanus Mesh 2023-09-12 Open Download  
000558380 lower p4 (cast) amnh:mammals:52692 Perodicticus potto ibeanus Mesh 2023-09-12 Open Download  
000558376 lower second molar (cast) FMNH:Mammals:171108 Perodicticus potto Mesh 2023-09-12 Open Download  
000558373 lower p4 (cast) FMNH:Mammals:171108 Perodicticus potto Mesh 2023-09-12 Open Download  
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