An evolutionary view on tooth development and replacement in wild Atlantic salmon (Salmo salar L.)

Evolution & Development
A Huysseune, P Eckhard Witten

Abstract

To gain an insight into the evolution of tooth replacement mechanisms, we studied the development of first-generation and replacement teeth on the dentary of wild Atlantic salmon (Salmo salar L.), a protacanthopterygian teleost, using serially sectioned heads of early posthatching stages as well as adults. First-generation teeth develop within the oral epithelium. The anlage of the replacement tooth is first seen as a placode-like thickening of the outer dental epithelium of the predecessor, at its lingual and caudal side. Ongoing development of the replacement tooth germ is characterized by the elaboration of a population of epithelial cells, termed here the middle dental epithelium, apposed to the inner dental epithelium on the lingual side of the tooth germ. Before the formation of the new successor, a single-layered outer dental epithelium segregates from the middle dental epithelium. The dental organs of the predecessor and the successor remain broadly interconnected. The absence of a discrete successional dental lamina in salmon stands in sharp contrast to what is observed in other teleosts, even those that share with salmon the extraosseous formation of replacement teeth. The mode of tooth replacement in Atlantic salmon ...Continue Reading

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Citations

Jul 22, 2008·Development Genes and Evolution·Ann HuysseunePaul Eckhard Witten
Mar 11, 2010·Cell and Tissue Research·Keita MoriyamaNoriyuki Sahara
Apr 23, 2009·Biological Reviews of the Cambridge Philosophical Society·P Eckhard Witten, Ann Huysseune
Feb 5, 2016·Developmental Biology·Liam J RaschGareth J Fraser
Jan 13, 2009·Journal of Experimental Zoology. Part B, Molecular and Developmental Evolution·Elina JärvinenIrma Thesleff
Jan 22, 2009·Journal of Experimental Zoology. Part B, Molecular and Developmental Evolution·Moya M SmithThimios A Mitsiadis
May 9, 2009·Journal of Anatomy·Javier Catón, Abigail S Tucker
May 9, 2009·Journal of Anatomy·Ann HuysseuneP Eckhard Witten
Feb 18, 2011·Journal of Experimental Zoology. Part B, Molecular and Developmental Evolution·Gareth J Fraser, Moya Meredith Smith
Jun 4, 2014·Journal of Experimental Zoology. Part B, Molecular and Developmental Evolution·Sam VandenplasAnn Huysseune
Jul 23, 2016·Journal of Anatomy·Elena M PopaAbigail S Tucker
Nov 4, 2016·Nature·Donglei ChenPer E Ahlberg
Jun 14, 2020·Integrative and Comparative Biology·C Darrin HulseyGareth J Fraser
Dec 13, 2019·Royal Society Open Science·Mark DoelandMartin Rücklin
Jan 26, 2021·Swiss Journal of Palaeontology·Melina JobbinsChristian Klug

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