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de Vries et al. 2024 Comparison of dental topography of marmosets and tamarins (Callitrichidae) to other platyrrhine primates using a novel freeware pipeline Project ID: 000471738 Public
228 Media · 150 Specimens · Creator: de Vries, Dorien · Managed by: Dorien de Vries

https://doi.org/10.1007/s10914-024-09704-9 Dental topographic metrics (DTMs), which quantify different aspects of the shape of teeth, are powerful tools for studying dietary adaptation and evolution in mammals. Current DTM protocols usually rely on proprietary software, which may be unavailable to researchers for reasons of cost. We address this issue in the context of a DTM analysis of the primate clade Platyrrhini (“New World monkeys”) by: 1) presenting a large comparative sample of scanned second lower molars (m2s) of callitrichids (marmosets and tamarins), previously underrepresented in publicly available datasets; and 2) giving full details of an entirely freeware pipeline for DTM analysis and its validation. We also present an updated dietary classification scheme for extant platyrrhines, based on cluster analysis of dietary data extracted from 98 primary studies. Our freeware pipeline performs equally well in dietary classification accuracy of an existing sample of platyrrhine m2s (excluding callitrichids) as a published protocol that uses proprietary software when multiple DTMs are combined. Individual DTMs however, sometimes showed very different results in classification accuracies between protocols, most likely due to differences in smoothing functions. The addition of callitrichids resulted in high classification accuracy in predicting diet with combined DTMs, although accuracy was considerably higher when molar size was included (90%) than excluded (73%). We conclude that our new freeware DTM pipeline is capable of accurately predicting diet in platyrrhines based on tooth shape and size, and so is suitable for inferring probable diet of taxa for which direct dietary information is unavailable, such as fossil species.

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  ID Part Object Taxonomy Type Date Added Publication Status  
000475111 second mandibular molar USNM:MAMM:USNM 549521 Saguinus midas Mesh 2022-10-18 Open Download  
000474628 second mandibular molar USNM:MAMM:USNM 399073 Callimico goeldii Volumetric Image Series 2022-10-17 Open Download  
000474631 second mandibular molar USNM:MAMM:USNM 399073 Callimico goeldii Mesh 2022-10-17 Open Download  
000473375 second mandibular molar USNM:MAMM:USNM 239458 Mico argentatus Volumetric Image Series 2022-10-12 Open Download  
000473343 second mandibular molar USNM:MAMM:USNM 239461 Mico argentatus Mesh 2022-10-12 Open Download  
000471959 second mandibular molar MCZ:Mamm:37821 Callithrix penicillata Volumetric Image Series 2022-10-05 Open Download  
000471884 second mandibular molar USNM:MAMM:USNM 259427 Callithrix penicillata Volumetric Image Series 2022-10-05 Open Download  
000558235 lower second molar (cast) USNM:MAMM:USNM 461725 Mico argentatus Mesh 2023-09-11 Open Download  
000497796 second mandibular molar (cast) mn-rio:2718 Brachyteles arachnoides Mesh 2023-02-20 Open Download  
000497776 second mandibular molar (cast) mn-rio:106 Brachyteles arachnoides Mesh 2023-02-20 Open Download  
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