Data/hora: 10/06/2024 02:57:02

Provedor de dados: 	Revista Brasileira de Zoologia	
País: 	Brazil	
Título: 	Numerical anomalies in the dentition of southern fur seals and sea lions (Pinnipedia: Otariidae)	
Autores: 	Loch,Carolina; Simões-Lopes,Paulo C.; Drehmer,César J.	
Data: 	2010-06-01	
Ano: 	2010	
Palavras-chave: 	Arctocephalus australis; A. tropicalis; Dental agenesis; Otaria flavescens; Southern Brazil; Supernumerary teeth.	
Resumo: 	Cases of dental agenesis, supernumerary teeth and dental losses are presented in three species of South American Otariids: Arctocephalus australis (Zimmermann, 1783), A. tropicalis (Gray, 1872) and Otaria flavescens (Shaw, 1800). For the first time, congenital and acquired dental anomalies were comparatively diagnosed in skull samples from southern Brazil and nearby areas. The skulls and mandibles were accessed in the scientific collection of mammals of the Federal University of Santa Catarina, southern Brazil. Agenesis was found only among maxillary post-canine teeth, especially the distal ones (PC/6), due to an evolutionary trend towards reduction of the number of post-canine teeth in this family. Maxillary and mandibular supernumerary teeth were found in A. australis and A. tropicalis, but their positioning is unrelated to cases regarding phylogenetic and evolutionary implications. Dental losses were found in all species and different stages of alveolar obliteration suggest that this process is common in Otariids and does not affect their survival. The investigation of congenital and acquired dental anomalies in pinnipeds can provide information on dental formula evolution in Pinnipeds and in the phylogenetic relationships among Carnivora.	
Tipo: 	Info:eu-repo/semantics/article	
Idioma: 	Inglês	
Identificador: 	http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702010000300023	
Editor: 	Sociedade Brasileira de Zoologia	
Relação: 	10.1590/S1984-46702010005000001	
Formato: 	text/html	
Fonte: 	Zoologia (Curitiba)  v.27 n.3 2010	
Fonte: 	info:eu-repo/semantics/openAccess