Ghost lineage
Encyclopedia
A ghost lineage is a phylogenetic
Phylogenetics
In biology, phylogenetics is the study of evolutionary relatedness among groups of organisms , which is discovered through molecular sequencing data and morphological data matrices...

 lineage
Lineage (evolution)
An evolutionary lineage is a sequence of species, that form a line of descent, each new species the direct result of speciation from an immediate ancestral species. Lineages are subsets of the evolutionary tree of life. Lineages are often determined by the techniques of molecular systematics.-...

 that is inferred to exist but has no fossil
Fossil
Fossils are the preserved remains or traces of animals , plants, and other organisms from the remote past...

record.
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