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Can a creature be a living fossil if it was never a fossil?


Here’s David Tyler on a“’living fossil’ eel – unknown in the fossil record”:

In a cave in a fringing reef, at a depth of 35m, off the Ngemelis Island, Republic of Palau, an amazing fish was discovered in March 2009. Not only was this fish new to science, but the more it was studied, the more unusual it appeared to be.

“Despite some early questions about its affinities, preliminary phylogenetic analysis based on whole mitogenome sequences and numerous osteological features confidently placed this fish within the true eels. Additional morphological and molecular analyses demonstrate that in some features it is more primitive than Recent eels, and in others, even more primitive than the oldest known fossil eels, suggesting that it represents a ‘living fossil’ without a known fossil record. [. . .] Here, we describe a new family, genus and species for this enigmatic eel. We demonstrate, based on convincing evidence from morphology and whole mitochondrial genomes, that this genus is the most primitive living member of the Anguilliformes, and we accordingly assign it to a new family.”

But Tyler asks,

I know of no other case where an animal is declared to be a “living fossil” when it is completely unknown as a fossil. Its evolutionary history has been deduced. In this sense, the find is quite different from the coelacanth, which has a significant fossil record.

If the suggestion to reclassify living fossils as “durable species” were followed, it might be harder to justify this decision.

They have to call it a living fossil because the presumption is creatures have lived for millions of years and been evolving from before that. So this creature must be a living fossil even if no fossils found. In fact biology is only 6000 years old and simply diversity was greater at the very start and then extinction. so here and there in obscure areas this or that is found now and then. These creatures atrophy in these obscure areas. Robert Byers

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