Fig . 30. Skull of the northern pika Ochotona hyperborea.

Chapter

ABSTRACT

The condylobasal length of the skull varies from 32 to 41 mm; zygomatic width, from 19.5 to 22.9 mm; interorbital width, from 3.2 to 4.9 mm; alveolar length of the upper tooth row, from 6.2 to 8 mm.

Fig . 30. Skull of the northern pika Ochotona hyperborea. —third lower premolar tooth of the northern pika.

ABSTRACT