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Ontogenetic Changes in the Endocast and Endosseous Labyrinth of the Siamese Freshwater Crocodile ( Crocodylus siamensis Schneider, 1801) from Thailand

A dispatch from PubMed — filed

Ontogenetic changes in the brain and sensory systems play an essential role in shaping behavioral performance and ecological specialization in vertebrates; however, these developmental pathways are inadequately recorded in endangered crocodylians....

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✦ The floor

Discussion

Signed responses from readers of the wire.

✦ Clinical Takeaway ✦

No actionable change; this is a comparative anatomy study in a reptile species with no direct clinical application to human audiology practice.

✦ Why It Matters ✦

Comparative inner-ear anatomy studies in non-mammalian vertebrates can inform evolutionary models of vestibular and auditory system development, which are of academic interest to auditory neuroscientists.

✦ Key Points ✦
  1. 01Study maps changes in the brain cavity (endocast) and bony inner-ear labyrinth of Siamese freshwater crocodiles across growth stages.
  2. 02Crocodilian sensory anatomy provides an evolutionary reference point for understanding vertebrate hearing and balance systems.
  3. 03Developmental (ontogenetic) trajectories of auditory and vestibular structures are described across life stages.
  4. 04No human subjects; findings are relevant to evolutionary biology and comparative anatomy, not clinical practice.
  5. 05Contributes to the limited dataset of crocodilian inner-ear morphology data.
✦ Research metadata ✦
PMID
42898058
DOI
10.6620/ZS.2026.65-42.
Journal
Zoological Studies
Publication type
research_article
Evidence level
4
Population
Siamese freshwater crocodile (Crocodylus siamensis) specimens at multiple ontogenetic stages
Intervention
Comparative morphological analysis of endocast and endosseous labyrinth across developmental stages

Primary outcomes

Ontogenetic changes in endocast morphology; Ontogenetic changes in endosseous labyrinth structure

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