Show simple item record

dc.contributor.advisorDillon, Lawrence S.
dc.creatorAtkins, David Lynn
dc.date.accessioned2020-08-20T20:08:19Z
dc.date.available2020-08-20T20:08:19Z
dc.date.issued1970
dc.identifier.urihttps://hdl.handle.net/1969.1/DISSERTATIONS-176768
dc.description.abstractIt is proposed that the central nervous system and its components, because of their intimate and delicate relationship, to the remainder of the organism, remain free of trivial variation during normal ontogeny but, at the same time, response sensitively to major genetic changes resulting in the divergence of new species. The proliferation and consolidation of such changes should then provide clues to the evolutionary relationship between species and between higher taxa as well. To explore this hypothesis, the gross morphology of the cerebellum is described in detail in 68 species from all families of the mammalian order Carnivora; these are also compared broadly with 31 species representing nine other order of this class. Although there is a wide range of complexity in cerebellar morphology throughout the class and within the order Carnivora, a basic mammalian pattern is evident in all species, viz., three fundamental lobes subdivided into eight midline vermian lobules and four bilateral pairs of lobules in the two hemispheres. Subordinate to this is a hierarchy of trait sets respectively characteristic of each order, family, genus, and species. Within each taxon, these characters are remarkably stable, verifying the original premise. Two principle types of evolutionary statements can be derived from this study, relative to the development of the cerebellum itself as the species become more advanced, and to the phylogenetic connections among recent carnivore species. ...en
dc.format.extent311 leavesen
dc.format.mediumelectronicen
dc.format.mimetypeapplication/pdf
dc.rightsThis thesis was part of a retrospective digitization project authorized by the Texas A&M University Libraries. Copyright remains vested with the author(s). It is the user's responsibility to secure permission from the copyright holder(s) for re-use of the work beyond the provision of Fair Use.en
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/
dc.subjectMajor biologyen
dc.titleComparative morphology and evolution of the cerebellum in the mammalian order carnivoraen
dc.typeThesisen
thesis.degree.disciplineBiologyen
thesis.degree.grantorTexas A&M Universityen
thesis.degree.nameDoctor of Philosophyen
thesis.degree.namePh. D. in Biologyen
thesis.degree.levelDoctoralen
thesis.degree.levelDoctorialen
dc.contributor.committeeMemberCarter, D. S.
dc.contributor.committeeMemberDobson, William J.
dc.contributor.committeeMemberKrise, George M.
dc.contributor.committeeMemberMilliff, J. H.
dc.type.genredissertationsen
dc.type.materialtexten
dc.format.digitalOriginreformatted digitalen
dc.publisher.digitalTexas A&M University. Libraries
dc.identifier.oclc5731837


Files in this item

Thumbnail

This item appears in the following Collection(s)

Show simple item record

This item and its contents are restricted. If this is your thesis or dissertation, you can make it open-access. This will allow all visitors to view the contents of the thesis.

Request Open Access