Beaked Whale Identification Guide
Tooth position
A single pair of teeth is positioned midway between the apex of the beak and the posterior end of the mouth.
Tooth exposure
Erupted teeth in adult males are covered by gum tissue, with only the tip of tooth exposed. Teeth do not erupt in females or juveniles.
Tooth shape
In lateral profile, the anterior margin is weakly sinusoidal (convex proximally, concave distally) and is longer than the strongly convex posterior margin. A denticle is positioned at the top of the anterior edge of the tooth. When the denticle is not excessively worn, it extends well past the antero-dorsal edge of the tooth.
Mesoplodon bidens - Left medial teeth
Male - USNM 550414(Unusual animal with two teeth on each side of mandible)