| Journal: | Ameghiniana |
| Database: | PERIÓDICA |
| System number: | 000390274 |
| ISSN: | 0002-7014 |
| Authors: | Jadwiszczak, Piotr1 Acosta Hospitaleche, Carolina2 Reguero, Marcelo2 |
| Institutions: | 1Bialystok University, Institute of Biology, Bialystok. Polonia 2Universidad Nacional de La Plata, Museo de La Plata, La Plata, Buenos Aires. Argentina |
| Year: | 2013 |
| Season: | Dic |
| Volumen: | 50 |
| Number: | 6 |
| Pages: | 545-553 |
| Country: | Argentina |
| Language: | Inglés |
| Document type: | Artículo |
| Approach: | Analítico, descriptivo |
| English abstract | Redescribed and reinterpreted here is a partial skeleton of the oldest Antarctic penguin, Crossvallia unienwillia from the late Paleocene of Marambio (Seymour) Island. A thorough morphological analysis of limb bones (humerus, femur and tibiotarsus) allowed us to report both an amended reconstruction of type specimens and a revised taxonomic diagnosis of this large-sized early penguin. Moreover, an additional skeletal element, a single thoracic vertebra, is described for the first time. C. unienwillia is characterized by a mixture of features typical of both geologically older and younger penguins, supplemented by characters that are obviously unique. The above-mentioned fin- dings shed new light on the very beginning of penguin evolution |
| Disciplines: | Biología |
| Keyword: | Anatomía e histología, Aves, Paleontología, Aves marinas, Crossvallia unienwillia, Paleógeno, Isla Marambio (Seymour), Formación Cruce Valle, Unienwillia Crossvallia, Huesos de las extremidades, Vértebras torácicas |
| Keyword: | Biology, Anatomy and histology, Birds, Paleontology, Marine birds, Crossvallia unienwillia, Early Paleogene, Marambio (Seymour) Island, Cross Valley Formation, Limb bones, Thoracic vertebrae |
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