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Inferring echolocation in ancient bats.

Nancy B Simmons1, Kevin L Seymour, Jörg Habersetzer

  • 1American Museum of Natural History, Central Park West at 79th Street, New York, New York 10024, USA. simmons@amnh.org

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|August 21, 2010
PubMed
Summary
This summary is machine-generated.

Fossil bat Onychonycteris finneyi likely did not use laryngeal echolocation. Re-examination of its stylohyal-tympanic articulation suggests this primitive bat lacked the necessary anatomy for biosonar.

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Area of Science:

  • Paleontology
  • Evolutionary Biology
  • Comparative Anatomy

Background:

  • Laryngeal echolocation is a key evolutionary innovation in bats, enabling sophisticated sensory perception and predation.
  • Identifying osteological correlates for echolocation in fossil bats is crucial for understanding their behavior and evolution.
  • The stylohyal-tympanic articulation has been proposed as a reliable indicator of echolocation capability in bats.

Discussion:

  • This study re-evaluates the interpretation of the stylohyal-tympanic articulation in Onychonycteris finneyi, the oldest known bat.
  • We contest the previous assertion that O. finneyi possessed the necessary articulation for laryngeal echolocation.
  • Our analysis suggests that the observed features in O. finneyi do not support the presence of echolocation.

Key Insights:

  • The primitive bat Onychonycteris finneyi likely lacked the anatomical structures for laryngeal echolocation.
  • The stylohyal-tympanic articulation, previously cited as evidence for echolocation in O. finneyi, is reinterpreted.
  • This finding challenges the assumption that early bats were necessarily echolocating.

Outlook:

  • Further research into the fossil record is needed to refine our understanding of early bat sensory capabilities.
  • Comparative studies of hyoid apparatus morphology across bat lineages will clarify the evolution of echolocation.
  • Investigating alternative sensory modalities for O. finneyi may provide new insights into its ecological niche.