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Natural Science Forum / Biology / Paleontology / March 2006When did swim bladders evolve?
Does anyone know of a reference for the earliest known instance of a swim bladder in fish? Thanks, Matt Bille www.mattwriter.com > Does anyone know of a reference for the earliest known instance of a > swim bladder in fish? I don't know of any fossilized swim bladders. There are a few likely fossilized lungs, but if I recall, in placoderms. Swim bladders are a development of actinopterygians, so we can infer they were present some time in the Devonian, if not earlier. |
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