Biology / Bio 2315 · Capstone · 2–3 minutes
Tracing Tetrapod Evolution from Lobe-Finned Fish to Amniotes
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This capstone traces the vertebrate lineage from an ancestral lobe-finned bony fish through early tetrapods and amphibians to the amniote radiation producing reptiles, birds, and mammals.
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This trace runs through several branch points, not one straight line — bird ancestry runs through the reptile branch specifically, not through mammals, despite birds and mammals sharing warm-bodied traits that evolved independently along separate amniote lineages.