| Revue: | Anais da Academia Brasileira de Ciencias |
| Base de datos: | PERIÓDICA |
| Número de sistema: | 000424368 |
| ISSN: | 0001-3765 |
| Autores: | Chavarría Arellano, María Luisa1 Simoes, Tiago R2 Montellano Ballesteros, Marisol1 |
| Instituciones: | 1Universidad Nacional Autónoma de México, Instituto de Geología, Ciudad de México. México 2University of Alberta, Department of Biological Sciences, Edmonton, Alberta. Canadá |
| Año: | 2018 |
| Periodo: | Sep |
| Volumen: | 90 |
| Número: | 3 |
| Paginación: | 2781-2796 |
| País: | Brasil |
| Idioma: | Inglés |
| Tipo de documento: | Artículo |
| Enfoque: | Experimental, aplicado |
| Resumen en inglés | Borioteiioids comprise an extinct family of squamates that inhabited the Northern Hemisphere during the Cretaceous and were characterized by varying patterns of tooth replacement and dental morphology. Understanding the evolution of these tooth replacement patterns has, however, been largely hampered by an extremely fragmentary fossil record. Here we present new information on Dicothodon bajaensisfrom the Campanian of Baja California (Mexico), so far known only from isolated teeth and jaw fragments. Among abundant new materials there are ten maxillae and five dentaries belonging to distinct ontogenetic stages. Whereas juveniles display active tooth replacement, older specimens show no evidence of replacement. Dicothodon bajaensis is therefore inferred to have had arrested tooth replacement later in ontogeny. This provides the first evidence of cessation of tooth replacement during late ontogeny in lizards (living or extinct). This replacement type is also an evolutionary intermediate between the typical lizard replacement pattern, observed in some borioteiioids (e.g., Bicuspidon) and the complete absence of tooth replacement since early ontogeny as observed in other borioteiioids (e.g., Polyglyphanodon) |
| Disciplinas: | Biología |
| Palabras clave: | Paleontología, Anfibios y reptiles, Anatomía e histología, Fósiles, Registro fósil, Morfología dental, Reemplazo dental, Dicothodon bajaensis, Squamata, Cretácico, México |
| Keyword: | Paleontology, Amphibians and reptiles, Anatomy and histology, Fossils, Fossil record, Dental morphology, Tooth replacement, Dicothodon bajaensis, Squamata, Cretaceous, Mexico |
| Texte intégral: | Texto completo (Ver HTML) |
