Pachyostosis is a condition in vertebrate animals in which the bones experience a thickening, resulting in unusually solid bone structure with little to no marrow. It occurs in both terrestrial and aquatic vertebrates, such as manatees and dugongs, giant deer, plesiosaurs, and members of the Dinocephalia clade of therapsids.
- ^ Sci-Tech Dictionary. McGraw-Hill Dictionary of Scientific and Technical Terms.
- ^ plesiosauria.com Definition
- ^ Lister, A. M. (1994). The evolution of the giant deer, Megaloceros giganteus (Blumenbach). Zoological Journal of the Linnean Society 112(1-2): 65-100.