Independent Origins of Middle Ear Bones in Monotremes and Therians

  title={Independent Origins of Middle Ear Bones in Monotremes and Therians},
  author={T. Rich and James A. Hopson and A. Musser and T. Flannery and P. Vickers-rich},
  pages={910 - 914}
  • T. Rich, James A. Hopson, +2 authors P. Vickers-rich
  • Published 2005
  • Biology, Medicine
  • Science
  • A dentary of the oldest known monotreme, the Early Cretaceous Teinolophos trusleri, has an internal mandibular trough, which in outgroups to mammals houses accessory jaw bones, and probable contact facets for angular, coronoid, and splenial bones. Certain of these accessory bones were detached from the mandible to become middle ear bones in mammals. Evidence that the angular (homologous with the mammalian ectotympanic) and the articular and prearticular (homologous with the mammalian malleus… CONTINUE READING
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