Heterochronic evolution explains novel body shape in a Triassic coelacanth from Switzerland

Abstract A bizarre latimeriid coelacanth fish from the Middle Triassic of Switzerland shows skeletal features deviating from the uniform anatomy of coelacanths. The new form is closely related to a modern-looking coelacanth found in the same locality and differences between both are attributed to he...

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Autores principales:	Lionel Cavin, Bastien Mennecart, Christian Obrist, Loïc Costeur, Heinz Furrer
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/c47517f48b6440f3bf6183f043d92f0e
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spelling	oai:doaj.org-article:c47517f48b6440f3bf6183f043d92f0e2021-12-02T15:05:55ZHeterochronic evolution explains novel body shape in a Triassic coelacanth from Switzerland10.1038/s41598-017-13796-02045-2322https://doaj.org/article/c47517f48b6440f3bf6183f043d92f0e2017-10-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-13796-0https://doaj.org/toc/2045-2322Abstract A bizarre latimeriid coelacanth fish from the Middle Triassic of Switzerland shows skeletal features deviating from the uniform anatomy of coelacanths. The new form is closely related to a modern-looking coelacanth found in the same locality and differences between both are attributed to heterochronic evolution. Most of the modified osteological structures in the new coelacanth have their developmental origin in the skull/trunk interface region in the embryo. Change in the expression of developmental patterning genes, specifically the Pax1/9 genes, may explain a rapid evolution at the origin of the new coelacanth. This species broadens the morphological disparity range within the lineage of these ‘living fossils’ and exemplifies a case of rapid heterochronic evolution likely trigged by minor changes in gene expression.Lionel CavinBastien MennecartChristian ObristLoïc CosteurHeinz FurrerNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-7 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Lionel Cavin Bastien Mennecart Christian Obrist Loïc Costeur Heinz Furrer Heterochronic evolution explains novel body shape in a Triassic coelacanth from Switzerland
description	Abstract A bizarre latimeriid coelacanth fish from the Middle Triassic of Switzerland shows skeletal features deviating from the uniform anatomy of coelacanths. The new form is closely related to a modern-looking coelacanth found in the same locality and differences between both are attributed to heterochronic evolution. Most of the modified osteological structures in the new coelacanth have their developmental origin in the skull/trunk interface region in the embryo. Change in the expression of developmental patterning genes, specifically the Pax1/9 genes, may explain a rapid evolution at the origin of the new coelacanth. This species broadens the morphological disparity range within the lineage of these ‘living fossils’ and exemplifies a case of rapid heterochronic evolution likely trigged by minor changes in gene expression.
format	article
author	Lionel Cavin Bastien Mennecart Christian Obrist Loïc Costeur Heinz Furrer
author_facet	Lionel Cavin Bastien Mennecart Christian Obrist Loïc Costeur Heinz Furrer
author_sort	Lionel Cavin
title	Heterochronic evolution explains novel body shape in a Triassic coelacanth from Switzerland
title_short	Heterochronic evolution explains novel body shape in a Triassic coelacanth from Switzerland
title_full	Heterochronic evolution explains novel body shape in a Triassic coelacanth from Switzerland
title_fullStr	Heterochronic evolution explains novel body shape in a Triassic coelacanth from Switzerland
title_full_unstemmed	Heterochronic evolution explains novel body shape in a Triassic coelacanth from Switzerland
title_sort	heterochronic evolution explains novel body shape in a triassic coelacanth from switzerland
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/c47517f48b6440f3bf6183f043d92f0e
work_keys_str_mv	AT lionelcavin heterochronicevolutionexplainsnovelbodyshapeinatriassiccoelacanthfromswitzerland AT bastienmennecart heterochronicevolutionexplainsnovelbodyshapeinatriassiccoelacanthfromswitzerland AT christianobrist heterochronicevolutionexplainsnovelbodyshapeinatriassiccoelacanthfromswitzerland AT loiccosteur heterochronicevolutionexplainsnovelbodyshapeinatriassiccoelacanthfromswitzerland AT heinzfurrer heterochronicevolutionexplainsnovelbodyshapeinatriassiccoelacanthfromswitzerland
_version_	1718388669957537792

Heterochronic evolution explains novel body shape in a Triassic coelacanth from Switzerland

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