Beaked Whale Identification Guide
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Lateral view of M. ginkgodens head
 
Lateral view of M. peruvianus head
Mouthline prominently stepped or arched.

Tooth position on mandibular arch varies.

Degree of tooth exposed above gumline varies.
 
Mouthline sinusoidal, but not strongly arched.

Tooth position is on the elevated portion of the mandible.

Only the the tips of the teeth are exposed above the gumline.
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