Functional relationship between muscles of mastication and the skull with enlarged orbit in the Baikal seal (Phoca sibirica).

摘要: We expected that the enlarged area of zygomatic arch, one some skull characters adapted for eye, has an influence on form and function muscles mastication in Baikal seal (Phoca sibirica). So, this species, Mm. masseter, temporalis, pterygoidei, digastricus were observed macroscopic level. The related to these also compared between a close-related ringed hispida). masseter temporalis well-developed using attachment arch. In contrast, M. is suggested be not so important seal, because temporal bone developed as seal. It especially arch among Pusa species. suggest robust equipped have main retractor mandibular body