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Evolution of the Auditory System in Synapsida (“Mammal-Like Reptiles” and Primitive Mammals) as Seen in the Fossil Record
Based on evidence from comparative anatomy, embryology, and paleontology, it is well established that the middle ear of existing mammals is morphologically unique, the tympanic bone, malleus, incus,Expand
Reconstruction of the cranial vessels in the Early Cretaceous mammal Vincelestes neuquenianus: implications for the evolution of the mammalian cranial vascular system
ABSTRACT Vincelestes neuquenianus from the Early Cretaceous of Argentina is the earliest therian mammal known from nearly complete crania. Described here is the structure of the petrosal bone andExpand
Basicranial Evidence for Early Mammal Phylogeny
The distribution of thirty-eight basicranial characters is considered among monotremes, marsupials, placentals, and the following extinct taxa—Tritheledontidae, Tritylodontidae, Sinoconodon,Expand
Homologies of the Prootic Canal in Mammals and Non-mammalian Cynodonts
ABSTRACT The term prootic canal has been used to describe vascular canals in the adult petrosal bones of extant monotremes and marsupials and presumed vascular canals in the petrosals of extinctExpand
GHOST LINEAGES AND MAMMALNESS : ASSESSING THE TEMPORAL PATTERN OF CHARACTER ACQUISITION IN THE SYNAPSIDA
The origin of mammals has been characterized as a gradual process, a claim based pri- marily on a well-preserved series of extinct nonmammalian synapsids ("mammal-like reptiles") that span some 200Expand
The evolution of cranial display structure in hadrosaurian dinosaurs
A theory is presented that cranial crests of hadrosaurs were visual and acoustical display organs. Facial morphology and phylogeny of the Hadrosauridae and earlier theories of crest function areExpand
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