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• W3042403820 abstract "Teeth in sharks are shed and replaced throughout their lifetime. Morphological dental changes through ontogeny have been identified in several species and have been correlated with shifts in diet and the acquisition of sexual maturity. However, these changes were rarely quantified in detail along multiple ontogenetic stages, which makes it difficult to infer the developmental processes responsible for the observed plasticity. In this work, we use micro-computed tomography and 3D geometric morphometrics to describe and analyze the tooth size and shape diversity across three ontogenetic stages (hatchling, juvenile, and sexually mature) in the large-spotted catshark Scyliorhinus stellaris (Linnaeus, 1758). We first describe the intra-individual variation of tooth form for each sex at each ontogenetic stage. We provide a tooth morphospace for palatoquadrate and Meckelian teeth and identify dental features, such as relative size and number of cusps, involved in the range of variation of the observed morphologies. We then use these shape data to draw developmental trajectories between ontogenetic stages and for each tooth position within the jaw to characterize ontogenetic patterns of sexual dimorphism. We highlight the emergence of gynandric heterodonty between the juvenile and mature ontogenetic stages, with mature females having tooth morphologies more similar to juveniles' than mature males that display regression in the number of accessory cusps. From these data, we speculate on the developmental processes that could account for such developmental plasticity in S. stellaris." @default.
• W3042403820 created "2020-07-23" @default.
• W3042403820 creator A5019079382 @default.
• W3042403820 creator A5044110115 @default.
• W3042403820 creator A5049731700 @default.
• W3042403820 creator A5065157219 @default.
• W3042403820 date "2020-07-15" @default.
• W3042403820 modified "2023-10-10" @default.
• W3042403820 title "The intraspecific diversity of tooth morphology in the large‐spotted catshark<i>Scyliorhinus stellaris</i>: insights into the ontogenetic cues driving sexual dimorphism" @default.
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• W3042403820 doi "https://doi.org/10.1111/joa.13257" @default.
• W3042403820 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/7542197" @default.
• W3042403820 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/32667054" @default.
• W3042403820 hasPublicationYear "2020" @default.
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