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Dental topographic analysis of paromomyid (Plesiadapiformes, Primates) cheek teeth: more than 15 million years of changing surfaces and shifting ecologies Project ID: 00000C345 Public
89 Media · 37 Specimens · Managed by: Sergi López-Torres

Plesiadapiforms, appearing near the Cretaceous-Paleogene boundary, represent the first primate radiation and show a diverse array of tooth morphologies. Dental topographic metrics provide quantitative data on occlusal surface shape. We used three metrics, Dirichlet Normal Energy, Relief Index, and 3D Orientation Patch Count Rotated, to assess changes in the morphology of lower fourth premolars and lower second molars in a taxonomically broad sample of one family of plesiadapiforms, Paromomyidae, stretching more than 15 million years. Our results indicate that paromomyids occupied a more diverse range of dietary categories than suspected. Whereas all paromomyids were likely omnivores, some species show higher levels of insectivory, while other taxa are inferred to have been mixed-feeding omnivores with high levels of fruit intake. The results also show that the more primitive members of the different paromomyid lineages were more insectivorous than the derived and more recent members of those lineages. Relief Index values also show taxonomic signals that are consistent with ancestor-descendant relationships hypothesised for species of Phenacolemur. These results suggest that dental topographic metrics are informative to the study of paromomyids for both dietary categorisation and for the distinction of species at a fine taxonomic level.

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  • Dental topographic analysis of paromomyid (Plesiadapiformes, Primates) cheek teeth: more than 15 million years of changing surfaces and shifting ecologies[remove]7
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Filtering by: Data Manager AMNH VP Team Remove constraint Data Manager: AMNH VP Team Project Dental topographic analysis of paromomyid (Plesiadapiformes, Primates) cheek teeth: more than 15 million years of changing surfaces and shifting ecologies Remove constraint Project: Dental topographic analysis of paromomyid (Plesiadapiformes, Primates) cheek teeth: more than 15 million years of changing surfaces and shifting ecologies
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  ID Part Object Taxonomy Type Date Added Publication Status  
000027205 Lower p4 amnh:fm:48005 Simpsonlemur jepseni Mesh 2017-06-15 Restricted Download  
000026666 Lower p4 amnh:fm:48005 Simpsonlemur jepseni Volumetric Image Series 2017-05-30 Restricted Download  
000027204 Lower m2 amnh:fm:48005 Simpsonlemur jepseni Mesh 2017-06-15 Restricted Download  
000026665 Lower m2 amnh:fm:48005 Simpsonlemur jepseni Volumetric Image Series 2017-05-30 Restricted Download  
000027207 Lower m2 amnh:fm:88309 Ignacius fremontensis Mesh 2017-06-15 Restricted Download  
000027206 Lower p4 amnh:fm:88309 Ignacius fremontensis Mesh 2017-06-15 Restricted Download  
000026659 Lower mandible amnh:fm:88309 Ignacius fremontensis Volumetric Image Series 2017-05-30 Restricted Download  
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