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Verfasst von:Vullo, Romain [VerfasserIn]   i
 Villalobos-Segura, Eduardo [VerfasserIn]   i
 Amadori, Manuel [VerfasserIn]   i
 Kriwet, Jürgen [VerfasserIn]   i
 Frey, Eberhard [VerfasserIn]   i
 González González, Margarito A. [VerfasserIn]   i
 Padilla Gutiérrez, José M. [VerfasserIn]   i
 Ifrim, Christina [VerfasserIn]   i
 Stinnesbeck, Eva S. [VerfasserIn]   i
 Stinnesbeck, Wolfgang [VerfasserIn]   i
Titel:Exceptionally preserved shark fossils from Mexico elucidate the long-standing enigma of the Cretaceous elasmobranch Ptychodus
Verf.angabe:Romain Vullo, Eduardo Villalobos-Segura, Manuel Amadori, Jürgen Kriwet, Eberhard Frey, Margarito A. González González, José M. Padilla Gutiérrez, Christina Ifrim, Eva S. Stinnesbeck, Wolfgang Stinnesbeck
E-Jahr:2024
Jahr:30 April 2024
Umfang:12 S.
Illustrationen:Illustrationen
Fussnoten:Online veröffentlicht: 24. April 2024 ; Gesehen am 24.09.2024
Titel Quelle:Enthalten in: Royal Society (London)Proceedings of the Royal Society of London. Series B, Biological sciences
Ort Quelle:London : The Royal Society, 1905
Jahr Quelle:2024
Band/Heft Quelle:291(2024), 2021 vom: Apr., Artikel-ID 20240262, Seite [1]-12
ISSN Quelle:1471-2954
Abstract:The fossil fish Ptychodus Agassiz, 1834, characterized by a highly distinctive grinding dentition and an estimated gigantic body size (up to around 10 m), has remained one of the most enigmatic extinct elasmobranchs (i.e. sharks, skates and rays) for nearly two centuries. This widespread Cretaceous taxon is common in Albian to Campanian deposits from almost all continents. However, specimens mostly consist of isolated teeth or more or less complete dentitions, whereas cranial and post-cranial skeletal elements are very rare. Here we describe newly discovered material from the early Late Cretaceous of Mexico, including complete articulated specimens with preserved body outline, which reveals crucial information on the anatomy and systematic position of Ptychodus. Our phylogenetic and ecomorphological analyses indicate that ptychodontids were high-speed (tachypelagic) durophagous lamniforms (mackerel sharks), which occupied a specialized predatory niche previously unknown in fossil and extant elasmobranchs. Our results support the view that lamniforms were ecomorphologically highly diverse and represented the dominant group of sharks in Cretaceous marine ecosystems. Ptychodus may have fed predominantly on nektonic hard-shelled prey items such as ammonites and sea turtles rather than on benthic invertebrates, and its extinction during the Campanian, well before the end-Cretaceous crisis, might have been related to competition with emerging blunt-toothed globidensine and prognathodontine mosasaurs.
DOI:doi:10.1098/rspb.2024.0262
URL:Bitte beachten Sie: Dies ist ein Bibliographieeintrag. Ein Volltextzugriff für Mitglieder der Universität besteht hier nur, falls für die entsprechende Zeitschrift/den entsprechenden Sammelband ein Abonnement besteht oder es sich um einen OpenAccess-Titel handelt.

Volltext: https://doi.org/10.1098/rspb.2024.0262
 Volltext: https://royalsocietypublishing.org/doi/10.1098/rspb.2024.0262
 DOI: https://doi.org/10.1098/rspb.2024.0262
Datenträger:Online-Ressource
Sprache:eng
Sach-SW:Chondrichthyes
 ecomorphology
 Lamniformes
 Late Cretaceous
 Ptychodontidae
 Vallecillo fossil Lagerstätte
K10plus-PPN:1903404282
Verknüpfungen:→ Zeitschrift

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