Exceptional preservation of the white sharkCarcharodon(Lamniformes, Lamnidae) from the early Pliocene of Peru
| Autor: | Gordon Hubbell, Dana J. Ehret, Bruce J. MacFadden |
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| Rok vydání: | 2009 |
| Předmět: | |
| Zdroj: | Journal of Vertebrate Paleontology. 29:1-13 |
| ISSN: | 1937-2809 0272-4634 |
| DOI: | 10.1671/039.029.0113 |
| Popis: | An exceptionally well-preserved white shark fossil (Carcharodon sp.) is described here from the early Pliocene (ca. 4 Ma) Pisco Formation of southwestern Peru. This specimen preserves 222 teeth and 45 vertebrae as well as fragmentary jaws. The teeth show characters of Carcharodon, including weak serrations and a symmetrical first anterior tooth that is the largest in the tooth row. This dentition also shows a character of Isurus with a distally inclined but mesially slanted intermediate tooth. Although the Pisco specimen demonstrates characters of both Isurus, also known form the Pisco Formation, and modern Carcharodon carcharias, it is assigned to the genus Carcharodon and referred to herein as Carcharodon sp. While Carcharodon sp. From the Pisco Formation shows numerous diagnostic characteristics shared with C. carcharias, it differs from the extant species in having a distal inclination of the intermediate tooth. The precaudal vertebral centra of the Pisco Carcharodon preserve distinctive dark... |
| Databáze: | OpenAIRE |
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