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Details van artikel 57 van 83 gevonden artikelen
| Titel: |
New tertiary sebecosuchians (Crocodylomorpha) from South America: Phylogenetic implications |
| Auteur: |
Gasparini, Zulma Fernandez, Marta Powell, Jaime |
| Verschenen in: |
Historical biology |
| Paginering: | Jaargang 7 (1993) nr. 1 pagina's 1-19 |
| Jaar: |
1993-07 |
| Inhoud: |
A new family, genus and species of a sebecosuchian crocodile from the late Paleocene of northwestern Argentina is described. This new taxon shows several apomorphic conditions such as the bent premaxillae, very high posterior part of the jugal, bent pterygoids, 3 pairs of procumbent teeth and a broad retroarticular process. The cladistic analysis carried out places this taxon as the sister group of Sebecus. The sebecosuchians are defined as a natural group restricted to South America. The baurusuchids come from several upper Cretaceous localities of southeastern Brazil, and northwest of Patagonia. The bretesuchids were found in the middle Paleocene of Brazil, late Paleocene and late Eocene of Argentina. The wider geographical and chronological distribution corresponds to the sebecids. They are registered from the early Paleocene in Patagonia and Bolivia to the middle Miocene in Colombia. The sebecosuchians were strong predators and probably more terrestrial in habits than other crocodilians. The lateral compression of the snout, the almost lateral orbits, the strongly bent pterygoids and a femur with a well developed 4th trochanter are features that support this idea. During the Tertiary, the sebecosuchian played an important role as active predators, favoured by the relative absence of large terrestrial predators in the isolated South America. |
| Uitgever: |
Taylor & Francis |
| Bronbestand: |
Elektronische Wetenschappelijke Tijdschriften |
Details van artikel 57 van 83 gevonden artikelen
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