Encyclopedia of Animal Cognition and Behavior

Living Edition
| Editors: Jennifer Vonk, Todd Shackelford

Monotreme Sensory Systems

  • Ken W. S. AshwellEmail author
Living reference work entry
DOI: https://doi.org/10.1007/978-3-319-47829-6_2066-1

Synonyms

Introduction

Monotremes are a unique group of mammals confined to Australia and New Guinea. The lineage leading to modern monotremes probably diverged from that leading to therians (modern placental and marsupial mammals) as much as 220 million years ago (Yu et al. 2012), so there has been abundant time for independent evolution of sensory systems and the brain. Modern monotremes cannot be considered primitive or relict, and they are certainly not models for the ancestors of placental mammals. Monotremes have undergone just as long a period of evolution as have therians. Furthermore, although they do exhibit some primitive characteristics, living monotremes are also highly specialized animals with some remarkably advanced neural adaptations (e.g., electroreception and isocortical expansion). Like all mammals (including humans), they are therefore the result of mosaic evolution, where primitive and derived...

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Copyright information

© Springer Nature Switzerland AG 2019

Authors and Affiliations

  1. 1.Department of Anatomy, School of Medical SciencesUniversity of New South WalesSydneyAustralia

Section editors and affiliations

  • Jennifer Vonk
    • 1
  1. 1.Oakland UniversityRochesterUSA