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Auditory bulla

The auditory bulla (pl. auditory bullae) is a hollow bony structure on the ventral, posterior portion of the skull that encloses parts of the middle and inner ear. In most mammal species, it is formed by the tympanic part of the temporal bone.[1]

In extant primates, the structure is found in tarsiers, lemurs, and lorises.[2]


  1. "Mammal Glossary". Laboratory for Environmental Biology, UTEP. 02 November 2007. http://www3.utep.edu/LEB/keys/glossary.htm. Retrieved 14 September 2009. 
  2. Ankel-Simons, Friderun (2007). Primate Anatomy (3rd ed.). Academic Press. p. 435. ISBN 0-12-372576-3. 


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