Chapter 14: The Basicranial and Posterior Cranial Anatomy of the Families of the Toxodontia
2004; American Museum of Natural History; Volume: 285; Linguagem: Inglês
10.1206/0003-0090(2004)285 2.0.co;2
ISSN1937-3546
Autores Tópico(s)Ichthyology and Marine Biology
ResumoThe basicranial and posterior cranial anatomy of the extinct suborder Toxodontia (order Notoungulata) is described using representatives from the five constituent families, Isotemnidae, Homalodotheriidae, Leontiniidae, Notohippidae, and Toxodontidae. New traits of intratympanic anatomy in toxodontians are identified. Based on observations presented here, some previous anatomical interpretations are clarified or corrected. The morphology of the bulla does not imply a compound bony origin; it is apparently comprised solely of ectotympanic bone. Additionally, previous osteological evidence offered to support the presence of an internal carotid artery could not be confirmed, leaving open the question of the source of intracranial blood supply.
Referência(s)