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May 7, 2026Proceedings of the Royal Society B Biological SciencesOpen Access

The ray-finned fish blackbox: unprecedented morphological diversity and the interplay between brain and endocast

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Authors

RFRodrigo Tinoco FigueroaSPStephanie E. Pierce

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Overview

Observations uncover variable endocast morphology in ray-finned fishes, suggesting brain morphology diverges from predictions.

Key Points

  • This research aims to understand the relationship between brain morphology and endocast in ray-finned fishes.
  • Described morphological diversity of endocasts in extant ray-finned fishes.
  • Compared current endocasts to those from the fossil record.
  • Explored the relationship between endocast and brain across a large sample of extant taxa.
  • Endocasts are a poor predictor of brain morphology in ray-finned fishes.
  • Endocasts provide valuable insights into neurocranial diversification.
  • Unexpected morphological diversity of endocasts was noted.

Cite This Study

Figueroa et al. (2026) studied this question.

synapsesocial.com/papers/69fbefa3164b5133a91a3836https://doi.org/10.1098/rspb.2025.3277
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