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Text
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<a href="http://doi.org/10.1098/rspb.2018.2417" target="_blank" rel="noreferrer noopener">http://doi.org/10.1098/rspb.2018.2417</a>
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Pages
20182417-20182417
Issue
1896
Volume
286
NEOMED College
NEOMED College of Medicine
NEOMED Department
Department of Anatomy & Neurobiology
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Title
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Unexpected evolutionary patterns of dental ontogenetic traits in cetartiodactyl mammals.
Publisher
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Proceedings. Biological sciences
Date
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2019
2019-02
Subject
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*Phylogeny; life history; Cetartiodactyla; dental eruption; herbivory
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Rodrigues Helder Gomes; Lihoreau Fabrice; Orliac Maeva; Thewissen J G M; Boisserie Jean-Renaud
Description
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Studying ontogeny in both extant and extinct species can unravel the mechanisms underlying mammal diversification and specialization. Among mammalian clades, Cetartiodactyla encompass species with a wide range of adaptations, and ontogenetic evidence could clarify longstanding debates on the origins of modern specialized families. Here, we study the evolution of dental eruption patterns in early diverging cetartiodactyls to assess the ecological and biological significance of this character and shed new light on phylogenetic issues. After investigation of the ontogenetic dental series of 63 extinct genera, our parsimony reconstructions of eruption state evolution suggest that the eruption of molars before permanent premolars represents a plesiomorphic condition within Cetartiodactyla. This result substantially differs from a previous study based on modern species only. As a result, the presence of this pattern in most ruminants might represent an ancestral condition contributing to their specialized herbivory, rather than an original adaptation. In contrast, the late eruption of molars in hippopotamoids is more likely related to biological aspects, such as increases in body mass and slower pace of life. Our study mainly shows that eruption sequences reliably characterize higher level cetartiodactyl taxa and could represent a new source of phylogenetic characters, especially to disentangle the origin of hippopotamoids and cetaceans.
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<a href="http://doi.org/10.1098/rspb.2018.2417" target="_blank" rel="noreferrer noopener">10.1098/rspb.2018.2417</a>
*Phylogeny
2019
Boisserie Jean-Renaud
Cetartiodactyla
dental eruption
Department of Anatomy & Neurobiology
herbivory
life history
Lihoreau Fabrice
NEOMED College of Medicine
Orliac Maeva
Proceedings. Biological sciences
Rodrigues Helder Gomes
Thewissen J G M