Liometopum Stygium
''Liometopum stygium'' is an extinct species of Miocene ants in the genus ''Liometopum''. Described by Heer in 1867, fossils of the species were found in Switzerland. References

Dolichoderinae, † Miocene insects Neogene insects of Europe Fossil taxa described in 1867 Fossil ant taxa Miocene animals of Europe {{Dolichoderinae-stub ...
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Extinct
Extinction is the termination of a kind of organism or of a group of kinds (taxon), usually a species. The moment of extinction is generally considered to be the death of the last individual of the species, although the capacity to breed and recover may have been lost before this point. Because a species' potential range may be very large, determining this moment is difficult, and is usually done retrospectively. This difficulty leads to phenomena such as Lazarus taxa, where a species presumed extinct abruptly "reappears" (typically in the fossil record) after a period of apparent absence. More than 99% of all species that ever lived on Earth, amounting to over five billion species, are estimated to have died out. It is estimated that there are currently around 8.7 million species of eukaryote globally, and possibly many times more if microorganisms, like bacteria, are included. Notable extinct animal species include non-avian dinosaurs, saber-toothed cats, dodos, m ...
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