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Pygmy sperm whale
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===Brain=== The rostroventral dura of the brain contains a significant concentration of magnetite crystals, which suggests that ''K. breviceps'' can navigate by [[magnetoreception]].<ref name=Bloodworth2008/> Studies have also shown that compared to the [[sperm whale]], the pygmy sperm whale brain has significantly fewer neurons, which may be connected to a decreased complexity in social interaction and group-based living.<ref>{{cite journal |last1=Poth, Fung, Gunturkun, Ridgway |title=Neuron numbers in sensory corticies of five delphinids compared to a physterid, the pygmy perm whale |journal=Brain Research Bulletin |date=2005-02-25 |volume=66 |issue=357β360|pages=357β360 |doi=10.1016/j.brainresbull.2005.02.001 |pmid=16144614 |s2cid=14822113 }}</ref>
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