Lazarus taxon
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In paleontology, a Lazarus taxon is a taxon that disappears from one or more periods of the fossil record, only to appear again later. The term refers to an account in the Gospel of John, in which Jesus miraculously raised Lazarus from the dead. Lazarus taxa are observational artifacts that appear to occur either because of extinction, later resupplied, or as a sampling artifact. If the extinction is conclusively found to be total and the supplanting species is not a look alike, the observational artifact is overcome. The fossil record is inherently imperfect and contains gaps not necessarily…mehr

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In paleontology, a Lazarus taxon is a taxon that disappears from one or more periods of the fossil record, only to appear again later. The term refers to an account in the Gospel of John, in which Jesus miraculously raised Lazarus from the dead. Lazarus taxa are observational artifacts that appear to occur either because of extinction, later resupplied, or as a sampling artifact. If the extinction is conclusively found to be total and the supplanting species is not a look alike, the observational artifact is overcome. The fossil record is inherently imperfect and contains gaps not necessarily caused by extinction, particularly when the number of individuals in a taxon becomes very low. If these gaps are filled by new fossil discoveries, a taxon will no longer be classified as a Lazarus taxon