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September 10, 2025Biology LettersOpen Access

Tongue-bite apparatus highlights functional innovation in a 310-million-year-old ray-finned fish

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Research reveals ancient gill skeleton adaptations for feeding in the 310-million-year-old ray-finned fish, highlighting evolutionary strategies.

The 310-million-year-old fish demonstrates a unique feeding adaptation known as the tongue bite.
Key findings show the presence of a basibranchial tooth plate directly opposing the vomer during feeding.
Analysis of the fossil highlights how the gill skeleton evolved to support durophagy in ancient fishes.
Evidence suggests a lengthy diversification process for ray-finned fishes following the end-Devonian extinction.

Giles et al. (2025) studied this question.

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Research reveals ancient gill skeleton adaptations for feeding in the 310-million-year-old ray-finned fish, highlighting evolutionary strategies.