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- W2013765369 abstract "Paleozoic sphenacodontid synapsids are the oldest known fully terrestrial apex predators. Dimetrodon and other sphenacodontids are the first terrestrial vertebrates to have strong heterodonty, massive skulls and well-developed labio-lingually compressed and recurved teeth with mesial and distal cutting edges (carinae). Here we reveal that the dentition of Dimetrodon and other sphenacodontids is diverse. Tooth morphology includes simple carinae with smooth cutting edges and elaborate enamel features, including the first occurrence of cusps and true denticles (ziphodonty) in the fossil record. A time-calibrated phylogenetic analysis indicates that changes in dental morphology occur in the absence of any significant changes in skull morphology, suggesting that the morphological change is associated with changes in feeding style and trophic interactions in these ecosystems. In addition, the available evidence indicates that ziphodonty evolved for the first time in the largest known species of the genus Dimetrodon and independently from the ziphodont teeth observed in some therapsids. Early Permian sphenacodontid synapsids were the first terrestrial large-bodied apex predators. Here, Brink and Reisz show that sphenacodontids had a diverse dentition associated with the evolution of changes in feeding style at the onset of the first well established, complex terrestrial ecosystems." @default.
- W2013765369 created "2016-06-24" @default.
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- W2013765369 date "2014-02-07" @default.
- W2013765369 modified "2023-09-26" @default.
- W2013765369 title "Hidden dental diversity in the oldest terrestrial apex predator Dimetrodon" @default.
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- W2013765369 doi "https://doi.org/10.1038/ncomms4269" @default.
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