Plural of dipygus; organisms or individuals, particularly in paleontology, characterized by having two tails or tail-like structures instead of one.
From Greek 'di-' (two) and 'pygē' (rump/tail). The plural 'dipygi' uses the regular Latin/Greek masculine plural ending.
Paleontologists love finding dipygi fossils because double-tailed creatures were either rare anomalies or evidence of regeneration—each specimen rewrites what we think we know about prehistoric anatomy.
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