A new beaked whale record from the upper Miocene of Menorca, Balearic Islands, based on CT-scan analysis of limestone slabs
The finding of significant vertebrate remains inside commercial stone blocks is relatively rare. Here we describe a fossil cetacean skull discovered inside two slabs cut from a limestone block of Tortonian (i.e., early late Miocene) age from Menorca (Balearic Islands, Spain); this find represents th...
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doaj-546f9692457c41e49ba3f228176f7dc72020-11-25T01:13:03ZengInstitute of Paleobiology PASActa Palaeontologica Polonica0567-79201732-24212019-06-0164229130210.4202/app.00593.2019A new beaked whale record from the upper Miocene of Menorca, Balearic Islands, based on CT-scan analysis of limestone slabsGiovanni Bianucci0Josep Quintana Cardona1Alberto Collareta2Agustí Rodríguez Florit3Sergio Llàcer4Dipartimento di Scienze della Terra, Università di Pisa, via Santa Maria 53, 56126, Pisa, ItalyInstitut Català de Paleontologia Miquel Crusafont, Universitat Autònoma de Barcelona, Carrer de les Columnes s/n, 08193 Cerdanyola del Vallès, Barcelona, Spain; Carrer Gustau Mas 79, 1er, 07760 Ciutadella de Menorca, Illes Balears, SpainDipartimento di Scienze della Terra, Università di Pisa, via Santa Maria 53, 56126, Pisa, Italycarrer Himàlaia 37, 07703 Maó, Illes Balears, SpainInstitut Català de Paleontologia Miquel Crusafont, Universitat Autònoma de Barcelona, Carrer de les Columnes s/n, 08193 Cerdanyola del Vallès, Barcelona, SpainThe finding of significant vertebrate remains inside commercial stone blocks is relatively rare. Here we describe a fossil cetacean skull discovered inside two slabs cut from a limestone block of Tortonian (i.e., early late Miocene) age from Menorca (Balearic Islands, Spain); this find represents the third record of a fossil cetacean from this island, as well as the best preserved. Unlike similar cases in the past, the Menorca skull was not extracted mechanically from the stone matrix, being rather imaged by means of computed tomography. The resulting 3D reconstruction of the skull allows us to refer the studied skull to the extant odontocete family Ziphiidae (beaked whales) and sheds light on the morphology of very delicate structures (e.g., the thin pterygoid hamuli and the mesorostral cartilage) that would likely have been destroyed during traditional mechanical preparation. This non-invasive investigation permits detailed osteo- anatomical comparisons between the Menorca specimen and other extinct ziphiids, leading to the referral of the former to the stem beaked whale Messapicetus cf. longirostris. We then review the geographic distribution of fossil remains of Messapicetus, which include other occurrences from Tortonian shelf deposits of southeastern Italy, southern Peru, and Maryland (eastern USA). Early branching beaked whales (including basal members of the so-called “Messapicetus clade”) likely dispersed via the Central American Seaway, which allowed a direct communication between the Pacific and Atlantic oceans (including the Mediterranean cul-de-sac) throughout the Miocene.http://www.app.pan.pl/archive/published/app64/app005932019.pdfMammaliaCetaceaZiphiidaeMessapicetuspalaeobiogeographyNeogeneMediterraneanSpain |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Giovanni Bianucci Josep Quintana Cardona Alberto Collareta Agustí Rodríguez Florit Sergio Llàcer |
spellingShingle |
Giovanni Bianucci Josep Quintana Cardona Alberto Collareta Agustí Rodríguez Florit Sergio Llàcer A new beaked whale record from the upper Miocene of Menorca, Balearic Islands, based on CT-scan analysis of limestone slabs Acta Palaeontologica Polonica Mammalia Cetacea Ziphiidae Messapicetus palaeobiogeography Neogene Mediterranean Spain |
author_facet |
Giovanni Bianucci Josep Quintana Cardona Alberto Collareta Agustí Rodríguez Florit Sergio Llàcer |
author_sort |
Giovanni Bianucci |
title |
A new beaked whale record from the upper Miocene of Menorca, Balearic Islands, based on CT-scan analysis of limestone slabs |
title_short |
A new beaked whale record from the upper Miocene of Menorca, Balearic Islands, based on CT-scan analysis of limestone slabs |
title_full |
A new beaked whale record from the upper Miocene of Menorca, Balearic Islands, based on CT-scan analysis of limestone slabs |
title_fullStr |
A new beaked whale record from the upper Miocene of Menorca, Balearic Islands, based on CT-scan analysis of limestone slabs |
title_full_unstemmed |
A new beaked whale record from the upper Miocene of Menorca, Balearic Islands, based on CT-scan analysis of limestone slabs |
title_sort |
new beaked whale record from the upper miocene of menorca, balearic islands, based on ct-scan analysis of limestone slabs |
publisher |
Institute of Paleobiology PAS |
series |
Acta Palaeontologica Polonica |
issn |
0567-7920 1732-2421 |
publishDate |
2019-06-01 |
description |
The finding of significant vertebrate remains inside commercial stone blocks is relatively rare. Here we describe a fossil cetacean skull discovered inside two slabs cut from a limestone block of Tortonian (i.e., early late Miocene) age from Menorca (Balearic Islands, Spain); this find represents the third record of a fossil cetacean from this island, as well as the best preserved. Unlike similar cases in the past, the Menorca skull was not extracted mechanically from the stone matrix, being rather imaged by means of computed tomography. The resulting 3D reconstruction of the skull allows us to refer the studied skull to the extant odontocete family Ziphiidae (beaked whales) and sheds light on the morphology of very delicate structures (e.g., the thin pterygoid hamuli and the mesorostral cartilage) that would likely have been destroyed during traditional mechanical preparation. This non-invasive investigation permits detailed osteo- anatomical comparisons between the Menorca specimen and other extinct ziphiids, leading to the referral of the former to the stem beaked whale Messapicetus cf. longirostris. We then review the geographic distribution of fossil remains of Messapicetus, which include other occurrences from Tortonian shelf deposits of southeastern Italy, southern Peru, and Maryland (eastern USA). Early branching beaked whales (including basal members of the so-called “Messapicetus clade”) likely dispersed via the Central American Seaway, which allowed a direct communication between the Pacific and Atlantic oceans (including the Mediterranean cul-de-sac) throughout the Miocene. |
topic |
Mammalia Cetacea Ziphiidae Messapicetus palaeobiogeography Neogene Mediterranean Spain |
url |
http://www.app.pan.pl/archive/published/app64/app005932019.pdf |
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