The porbeagle shark, Lamna nasus (Elasmobranchii: Lamniformes), from the late Pliocene of the central Mediterranean Basin
The porbeagle shark, Lamna nasus, is an extant species of mackerel shark characterized by a tuna-shaped body, high swimming velocities, regional endothermy, and a predilection for sub-polar and cold-temperate waters below 18 °C. Porbeagle sharks inhabit a broad variety of mid- and high-latitude coas...
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Online Access: | http://hdl.handle.net/11568/958842 https://doi.org/10.1127/njgpa/2018/0718 |
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ftunivpisairis:oai:arpi.unipi.it:11568/958842 2024-04-14T08:14:33+00:00 The porbeagle shark, Lamna nasus (Elasmobranchii: Lamniformes), from the late Pliocene of the central Mediterranean Basin Collareta Alberto Casati Simone Di Cencio Andrea Collareta, Alberto Casati, Simone Di Cencio, Andrea 2018 http://hdl.handle.net/11568/958842 https://doi.org/10.1127/njgpa/2018/0718 eng eng info:eu-repo/semantics/altIdentifier/wos/WOS:000427022100003 volume:287 issue:3 firstpage:307 lastpage:316 numberofpages:10 journal:NEUES JAHRBUCH FÜR GEOLOGIE UND PALÄONTOLOGIE. ABHANDLUNGEN http://hdl.handle.net/11568/958842 doi:10.1127/njgpa/2018/0718 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85042945776 Lamnidae mackerel shark Piacenzian Siena Basin Tuscany climate change palaeo-biogeography palaeoenvironment palaeoichthyology info:eu-repo/semantics/article 2018 ftunivpisairis https://doi.org/10.1127/njgpa/2018/0718 2024-03-21T19:08:41Z The porbeagle shark, Lamna nasus, is an extant species of mackerel shark characterized by a tuna-shaped body, high swimming velocities, regional endothermy, and a predilection for sub-polar and cold-temperate waters below 18 °C. Porbeagle sharks inhabit a broad variety of mid- and high-latitude coastal and open-ocean environments, ranging across the northern Atlantic Ocean and in a continuous band in the Southern Hemisphere. We report on a fossil tooth, identified as belonging to Lamna nasus, discovered in late Pliocene (i.e., Piacenzian) upper bathyal mudstones exposed at Castelnuovo Berardenga Scalo (Siena Basin, Tuscany, Italy), a site which has also provided a well-diversified deep-water elasmobranch assemblage rich in forms such as Chlamydoselachus lawleyi and Centrophorus granulosus. To our knowledge, this specimen represents the first fossil record of L. nasus in the Mediterranean Basin; as such, it expands our knowledge on the late Pliocene central Mediterranean biodiversity and contributes to the still fragmentary fossil history of the genus Lamna. Our finding suggests that, at least at times, seawater temperatures suitable for cold-temperate coastal-pelagic organisms were present along the coasts of Tuscany during deposition of the mudstones exposed at Castelnuovo Berardenga Scalo. Since these deposits are believed to postdate the so-called Mid Piacenzian Warm Period (3.264-3.025 Ma), the occurrence of a tooth L. nasus could be regarded as an early marker of the long-lasting cooling trend which affected the Mediterranean waters starting from around 3 Ma. The porbeagle shark, therefore, might have been one of the earliest Atlantic cold-water fish taxa to enter the Mediterranean realm in Plio-Pleistocene times. Article in Journal/Newspaper Lamna nasus Porbeagle ARPI - Archivio della Ricerca dell'Università di Pisa Neues Jahrbuch für Geologie und Paläontologie - Abhandlungen 287 3 307 316 |
institution |
Open Polar |
collection |
ARPI - Archivio della Ricerca dell'Università di Pisa |
op_collection_id |
ftunivpisairis |
language |
English |
topic |
Lamnidae mackerel shark Piacenzian Siena Basin Tuscany climate change palaeo-biogeography palaeoenvironment palaeoichthyology |
spellingShingle |
Lamnidae mackerel shark Piacenzian Siena Basin Tuscany climate change palaeo-biogeography palaeoenvironment palaeoichthyology Collareta Alberto Casati Simone Di Cencio Andrea The porbeagle shark, Lamna nasus (Elasmobranchii: Lamniformes), from the late Pliocene of the central Mediterranean Basin |
topic_facet |
Lamnidae mackerel shark Piacenzian Siena Basin Tuscany climate change palaeo-biogeography palaeoenvironment palaeoichthyology |
description |
The porbeagle shark, Lamna nasus, is an extant species of mackerel shark characterized by a tuna-shaped body, high swimming velocities, regional endothermy, and a predilection for sub-polar and cold-temperate waters below 18 °C. Porbeagle sharks inhabit a broad variety of mid- and high-latitude coastal and open-ocean environments, ranging across the northern Atlantic Ocean and in a continuous band in the Southern Hemisphere. We report on a fossil tooth, identified as belonging to Lamna nasus, discovered in late Pliocene (i.e., Piacenzian) upper bathyal mudstones exposed at Castelnuovo Berardenga Scalo (Siena Basin, Tuscany, Italy), a site which has also provided a well-diversified deep-water elasmobranch assemblage rich in forms such as Chlamydoselachus lawleyi and Centrophorus granulosus. To our knowledge, this specimen represents the first fossil record of L. nasus in the Mediterranean Basin; as such, it expands our knowledge on the late Pliocene central Mediterranean biodiversity and contributes to the still fragmentary fossil history of the genus Lamna. Our finding suggests that, at least at times, seawater temperatures suitable for cold-temperate coastal-pelagic organisms were present along the coasts of Tuscany during deposition of the mudstones exposed at Castelnuovo Berardenga Scalo. Since these deposits are believed to postdate the so-called Mid Piacenzian Warm Period (3.264-3.025 Ma), the occurrence of a tooth L. nasus could be regarded as an early marker of the long-lasting cooling trend which affected the Mediterranean waters starting from around 3 Ma. The porbeagle shark, therefore, might have been one of the earliest Atlantic cold-water fish taxa to enter the Mediterranean realm in Plio-Pleistocene times. |
author2 |
Collareta, Alberto Casati, Simone Di Cencio, Andrea |
format |
Article in Journal/Newspaper |
author |
Collareta Alberto Casati Simone Di Cencio Andrea |
author_facet |
Collareta Alberto Casati Simone Di Cencio Andrea |
author_sort |
Collareta Alberto |
title |
The porbeagle shark, Lamna nasus (Elasmobranchii: Lamniformes), from the late Pliocene of the central Mediterranean Basin |
title_short |
The porbeagle shark, Lamna nasus (Elasmobranchii: Lamniformes), from the late Pliocene of the central Mediterranean Basin |
title_full |
The porbeagle shark, Lamna nasus (Elasmobranchii: Lamniformes), from the late Pliocene of the central Mediterranean Basin |
title_fullStr |
The porbeagle shark, Lamna nasus (Elasmobranchii: Lamniformes), from the late Pliocene of the central Mediterranean Basin |
title_full_unstemmed |
The porbeagle shark, Lamna nasus (Elasmobranchii: Lamniformes), from the late Pliocene of the central Mediterranean Basin |
title_sort |
porbeagle shark, lamna nasus (elasmobranchii: lamniformes), from the late pliocene of the central mediterranean basin |
publishDate |
2018 |
url |
http://hdl.handle.net/11568/958842 https://doi.org/10.1127/njgpa/2018/0718 |
genre |
Lamna nasus Porbeagle |
genre_facet |
Lamna nasus Porbeagle |
op_relation |
info:eu-repo/semantics/altIdentifier/wos/WOS:000427022100003 volume:287 issue:3 firstpage:307 lastpage:316 numberofpages:10 journal:NEUES JAHRBUCH FÜR GEOLOGIE UND PALÄONTOLOGIE. ABHANDLUNGEN http://hdl.handle.net/11568/958842 doi:10.1127/njgpa/2018/0718 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85042945776 |
op_doi |
https://doi.org/10.1127/njgpa/2018/0718 |
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287 |
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