ArticleJournal of anatomy2015
Anatomical evidence for low frequency sensitivity in an archaeocete whale: comparison of the inner ear of Zygorhiza kochii with that of crown Mysticeti.
Article in Journal of anatomy, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 24 papers.
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Who cites it
24 citing papers in PubMed, 74 citations in OpenAlex.
- Intraspecific variation of cochlear morphology in bowhead and beluga whales.Anatomical record (Hoboken, N.J. : 2007) · 2026Article
- Predicting ecology and hearing sensitivities in Parapontoporia-An extinct long-snouted dolphin.Anatomical record (Hoboken, N.J. : 2007) · 2026Article
- Hearing abilities of a late-surviving archaeocete (Cetacea: Kekenodontidae), and implications for the evolution of sound in Neoceti.Journal of anatomy · 2025Article
- Variation in whale (Cetacea) inner ear anatomy reveals the early evolution of "specialized" high-frequency hearing sensitivity.Journal of anatomy · 2025Article
- Convergent evolution in Afrotheria and non-afrotherians demonstrates high evolvability of the mammalian inner ear.Nature communications · 2024Article
- What are the limits on whale ear bone size? Non-isometric scaling of the cetacean bulla.PeerJ · 2021Article
- Article
- Evidence for convergent evolution of ultrasonic hearing in toothed whales (Cetacea: Odontoceti).Biology letters · 2019Article
- Associated tympanic bullar and cochlear hypertrophy define adaptations to true deserts in African gerbils and laminate-toothed rats (Muridae: Gerbillinae and Murinae).Journal of anatomy · 2019Article
- Article
- Neuroanatomy and inner ear labyrinths of the narwhal, Monodon monoceros, and beluga, Delphinapterus leucas (Cetacea: Monodontidae).Journal of anatomy · 2018Article
- Genomic and functional evidence reveals molecular insights into the origin of echolocation in whales.Science advances · 2018Article
- The bony labyrinth of toothed whales reflects both phylogeny and habitat preferences.Scientific reports · 2018Article
- Phylogenetic and functional implications of the ear region anatomy of Glossotherium robustum (Xenarthra, Mylodontidae) from the Late Pleistocene of Argentina.Die Naturwissenschaften · 2018Article
- Low-frequency hearing preceded the evolution of giant body size and filter feeding in baleen whales.Proceedings. Biological sciences · 2017Article
- Virtual reconstruction of the endocranial anatomy of the early Jurassic marine crocodylomorphPeerJ · 2017Article
- Best practices for digitally constructing endocranial casts: examples from birds and their dinosaurian relatives.Journal of anatomy · 2016Review
- Ultrasonic hearing and echolocation in the earliest toothed whales.Biology letters · 2016Article
- Bony labyrinth shape variation in extant Carnivora: a case study of Musteloidea.Journal of anatomy · 2016Article
- Form and function of the mammalian inner ear.Journal of anatomy · 2016Review
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Authors and funding
2 authors at 2 institutions in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
The evolution of hearing in cetaceans is a matter of current interest given that odontocetes (toothed whales) are sensitive to high frequency sounds and mysticetes (baleen whales) are sensitive to low and potentially infrasonic noises. Earlier diverging stem cetaceans (archaeocetes) were hypothesized to have had either low or high frequency sensitivity. Through CT scanning, the morphology of the bony labyrinth of the basilosaurid archaeocete Zygorhiza kochii is described and compared to novel information from the inner ears of mysticetes, which are less known than the inner ears of odontocetes. Further comparisons are made with published information for other cetaceans. The anatomy of the cochlea of Zygorhiza is in line with mysticetes and supports the hypothesis that Zygorhiza was sensitive to low frequency noises. Morphological features that support the low frequency hypothesis and are shared by Zygorhiza and mysticetes include a long cochlear canal with a high number of turns, steeply graded curvature of the cochlear spiral in which the apical turn is coiled tighter than the basal turn, thin walls separating successive turns that overlap in vestibular view, and reduction of the secondary bony lamina. Additional morphology of the vestibular system indicates that Zygorhiza was more sensitive to head rotations than extant mysticetes are, which likely indicates higher agility in the ancestral taxon.
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