cheetahtrout:Acanthodes“A fossil discovered near Hamilton, Kansas in the Upper Carboniferous H
cheetahtrout:Acanthodes“A fossil discovered near Hamilton, Kansas in the Upper Carboniferous Hamilton Formation, and published in 2014 as Acanthodes bridgei was so well-preserved that traces of its eye tissue were sufficient to establish that Acanthodes had both rod and cone photoreceptor cells, and thus profited from color vision“ -- source link
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