''Dolichoderus longipennis'' is an

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 ...

species of

Eocene The Eocene ( ) Epoch is a geological epoch (geology), epoch that lasted from about 56 to 33.9 million years ago (mya). It is the second epoch of the Paleogene Period (geology), Period in the modern Cenozoic Era (geology), Era. The name ''Eocene' ...

ant in the genus ''

Dolichoderus ''Dolichoderus'' is a genus of ants found worldwide. Taxonomy The ants of the Neotropical genus ''Monacis'' were revised in 1959 by Kempf. However, Brown in 1973 and G. C. Wheeler and J. Wheeler in 1973 and 1976 considered both ''Monacis'' and ' ...

''. Described by Mayr in 1868, the fossils were discovered in the

Baltic Amber The Baltic region is home to the largest known deposit of amber, called Baltic amber or succinite. It was produced sometime during the Eocene epoch, but exactly when is controversial. It has been estimated that these forests created more than 1 ...

.Mayr, G. 1868c. Die Ameisen des baltischen Bernsteins. Beiträge zur Naturkunde Preussens. ''Königlichen Physikalisch-Ökonomischen Gesellschaft zu Königsberg'' 1: 1-102. 31.xii).1868.PDF (page 67, pl. 4, fig. 65 male described) '
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References

† Prehistoric insects of Europe Fossil taxa described in 1868 Fossil ant taxa {{Dolichoderus-stub