Unverified50% confidenceFactExact time
Lazarus species refers to species that were once declared extinct but were rediscovered years or even decades later
1
Sources
50%
Confidence
Long-term
Relevance
10/4/2026
First Seen
Sources
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UnverifiedEurypterida is a completely extinct group of chelicerates that first appeared in the mid-Ordovician, reached the peak of their diversity and body size during the Silurian, and ultimately disappeared entirely at the end of the Permian.65% similarUnverifiedThe Ordovician–Silurian mass extinction occurred approximately 445–443 million years ago and was the first of the five major mass extinctions of the Phanerozoic, causing the disappearance of approximately 85% of marine species.64% similarUnverified楔齿蜥是喙头目现存的唯一物种，其祖先可追溯至约2.5亿年前的三叠纪，寿命可超过100年55% similar
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