Anomalias e patologias dentárias em Arctocephalus G. Saint-Hilaire & Cuvier (Pinnipedia, Otariidae) da costa do Rio Grande do Sul, Brasil Tooth anomalies and pathologies in Arctocephalus G. Saint-Hilaire & Cuvier (Pinnipedia, Otariidae) of Rio Grande do Sul coast, Brazil

The studied species were Arctocephalus australis (Zimmermann, 1783) and Arctocephalus tropicalis (Gray, 1872), (five specimens of each one). Anomalies were discussed under the light of theories which relate the ancestry of pinnipeds with the Ursidae; as well as concerning the evolutionary trends supposed for the Otariidae. Pathologies were related to alimentary and reproductive habits.