A unique Cretaceous–Paleogene lineage of piranha-jawed pycnodont fishes

Abstract The extinct group of the Pycnodontiformes is one of the most characteristic components of the Mesozoic and early Cenozoic fish faunas. These ray-finned fishes, which underwent an explosive morphological diversification during the Late Cretaceous, are generally regarded as typical shell-crus...

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Autores principales:	Romain Vullo, Lionel Cavin, Bouziane Khalloufi, Mbarek Amaghzaz, Nathalie Bardet, Nour-Eddine Jalil, Essaid Jourani, Fatima Khaldoune, Emmanuel Gheerbrant
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/c44e52ef7032431ebc34f45e169fc852
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spelling	oai:doaj.org-article:c44e52ef7032431ebc34f45e169fc8522021-12-02T15:04:58ZA unique Cretaceous–Paleogene lineage of piranha-jawed pycnodont fishes10.1038/s41598-017-06792-x2045-2322https://doaj.org/article/c44e52ef7032431ebc34f45e169fc8522017-07-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-06792-xhttps://doaj.org/toc/2045-2322Abstract The extinct group of the Pycnodontiformes is one of the most characteristic components of the Mesozoic and early Cenozoic fish faunas. These ray-finned fishes, which underwent an explosive morphological diversification during the Late Cretaceous, are generally regarded as typical shell-crushers. Here we report unusual cutting-type dentitions from the Paleogene of Morocco which are assigned to a new genus of highly specialized pycnodont fish. This peculiar taxon represents the last member of a new, previously undetected 40-million-year lineage (Serrasalmimidae fam. nov., including two other new genera and Polygyrodus White, 1927) ranging back to the early Late Cretaceous and leading to exclusively carnivorous predatory forms, unique and unexpected among pycnodonts. Our discovery indicates that latest Cretaceous–earliest Paleogene pycnodonts occupied more diverse trophic niches than previously thought, taking advantage of the apparition of new prey types in the changing marine ecosystems of this time interval. The evolutionary sequence of trophic specialization characterizing this new group of pycnodontiforms is strikingly similar to that observed within serrasalmid characiforms, from seed- and fruit-eating pacus to flesh-eating piranhas.Romain VulloLionel CavinBouziane KhalloufiMbarek AmaghzazNathalie BardetNour-Eddine JalilEssaid JouraniFatima KhaldouneEmmanuel GheerbrantNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-9 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Romain Vullo Lionel Cavin Bouziane Khalloufi Mbarek Amaghzaz Nathalie Bardet Nour-Eddine Jalil Essaid Jourani Fatima Khaldoune Emmanuel Gheerbrant A unique Cretaceous–Paleogene lineage of piranha-jawed pycnodont fishes
description	Abstract The extinct group of the Pycnodontiformes is one of the most characteristic components of the Mesozoic and early Cenozoic fish faunas. These ray-finned fishes, which underwent an explosive morphological diversification during the Late Cretaceous, are generally regarded as typical shell-crushers. Here we report unusual cutting-type dentitions from the Paleogene of Morocco which are assigned to a new genus of highly specialized pycnodont fish. This peculiar taxon represents the last member of a new, previously undetected 40-million-year lineage (Serrasalmimidae fam. nov., including two other new genera and Polygyrodus White, 1927) ranging back to the early Late Cretaceous and leading to exclusively carnivorous predatory forms, unique and unexpected among pycnodonts. Our discovery indicates that latest Cretaceous–earliest Paleogene pycnodonts occupied more diverse trophic niches than previously thought, taking advantage of the apparition of new prey types in the changing marine ecosystems of this time interval. The evolutionary sequence of trophic specialization characterizing this new group of pycnodontiforms is strikingly similar to that observed within serrasalmid characiforms, from seed- and fruit-eating pacus to flesh-eating piranhas.
format	article
author	Romain Vullo Lionel Cavin Bouziane Khalloufi Mbarek Amaghzaz Nathalie Bardet Nour-Eddine Jalil Essaid Jourani Fatima Khaldoune Emmanuel Gheerbrant
author_facet	Romain Vullo Lionel Cavin Bouziane Khalloufi Mbarek Amaghzaz Nathalie Bardet Nour-Eddine Jalil Essaid Jourani Fatima Khaldoune Emmanuel Gheerbrant
author_sort	Romain Vullo
title	A unique Cretaceous–Paleogene lineage of piranha-jawed pycnodont fishes
title_short	A unique Cretaceous–Paleogene lineage of piranha-jawed pycnodont fishes
title_full	A unique Cretaceous–Paleogene lineage of piranha-jawed pycnodont fishes
title_fullStr	A unique Cretaceous–Paleogene lineage of piranha-jawed pycnodont fishes
title_full_unstemmed	A unique Cretaceous–Paleogene lineage of piranha-jawed pycnodont fishes
title_sort	unique cretaceous–paleogene lineage of piranha-jawed pycnodont fishes
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/c44e52ef7032431ebc34f45e169fc852
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A unique Cretaceous–Paleogene lineage of piranha-jawed pycnodont fishes

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