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Skulls from 1,085 California sea lions (Zalophus californianus) were examined macroscopically according to defined criteria. The museum specimens, 61.8% male and 37.3% female, were acquired from strandings and varied in age from juvenile to adult. The majority of teeth were available for examination (95.7%); 3.8% of teeth were artefactually absent, 0.4% deemed absent due to acquired tooth loss and...
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