An organism or individual, particularly in paleontology or zoology, having two tails, rumps, or posterior regions instead of the typical one.
From Greek 'di-' (two) and 'pygē' (rump, tail). Used in scientific nomenclature to describe bilateral duplication of posterior anatomy.
Some trilobites show evidence of dipygus conditions—they might have lost a segment and regenerated a deformed one, creating nature's weirdest experiment in self-repair.
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