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[[Category:Oligocene amphibians]] [[Category:Chattian genus first appearances]] ...

[[Category:Extant Paleocene first appearances]] [[Category:Oligocene taxonomic orders]] ...

[[Category:Cisuralian first appearances]] [[Category:Extant Permian first appearances]] ...

[[Category:Extant Late Devonian first appearances]] [[Category:Oligocene taxonomic orders]] ...

| fossil_range = Early [[Oligocene]] to Present<br/>{{fossilrange|40|0}} | first = R. C. ...

| fossil_range = {{fossil_range|Oligocene|Recent|earliest=Cretaceous}} '''''Nephrops''''' is a genus of [[lobster]]s comprising a single extant species, ''[[Nephrops norvegicus]]'' (the Norway lobster or Dublin Bay praw ...

| fossil_range = [[Oligocene]] to present ...ontiidae''' or '''Haploodontini''' is traditionally classified as the sole extant family of the suborder [[Protrogomorpha]]. It may be the sister family of t ...

| fossil_range = Late [[Oligocene]] to Present<br />{{fossilrange|25|0}} ...ristle-mouth fishes show that the genus was already distinct in the [[Late Oligocene]], more than 23 [[million years ago]].<ref>Sepkoski (2002)</ref> ...

There are currently seven recognized extant species in this genus:<ref>{{FishBase genus | genus = Argyropelecus| month ...mb|''[[Argyropelecus prisca|A. prisca]]'', a [[fossil]] species from the [[Oligocene]] of [[Romania]]]] ...

| fossil_range = {{Fossil range|Oligocene|Recent}} ...siprymnodon''''' is a [[genus]] of [[Macropodiformes|macropod]]s. The sole extant species is ''[[Hypsiprymnodon moschatus]]'', the [[musky rat-kangaroo]]. Th ...

...|year=2018 |title=Basking shark (Lamniformes: Cetorhinidae) from the lower Oligocene of the Caucasus |journal=Journal of Ichthyology |volume=58 |issue=2 |pages= [[Category:Extant Eocene first appearances]] ...

| fossil_range = {{Fossil range|Late Oligocene|Recent}} ...pialia|marsupials]] of the order [[Diprotodontia]], consisting of only one extant species, the [[koala]],<ref name=msw3/> and six well-known fossil species, ...

| fossil_range = {{Fossil range|Oligocene|Recent}} ...containing animals commonly referred to as rat-kangaroos. The single known extant genus and species in this family, the [[musky rat-kangaroo]], ''Hypsiprymno ...

...to be distinct from the other families in this [[taxon]]. The related and extant families, [[Anhimidae]] ([[screamer]]s) and [[Anatidae]] ([[duck]]s, [[goos ...before all other ducks, geese and swans.<ref>{{cite journal |last=Livezey |first=Bradley C. |year=1986 |title=A phylogenetic analysis of recent anseriform g ...

| fossil_range = {{fossil range|28.4|0|[[Late Oligocene]] - Recent}} ...es [[Phascolarctidae]], with the [[koala]], and [[Vombatidae]], with three extant species of [[wombat]], survive. ...

| fossil_range = [[Upper Oligocene]]–present, {{Fossil range|28.1|0|ref=<ref name=PaleobiologyDB/>}} | subdivision = 6 [[Extant taxon|extant]] species (see [[#Species|text]]) ...

| fossil_range = {{Fossil range|Late Oligocene|Holocene}} ...3=S. J. |title=Three new thylacinids (Marsupialia, Thylacinidae) from late Oligocene deposits of the Riversleigh World Heritage Area, northwestern Queensland |j ...

| fossil_range = {{fossilrange|33.9|0}} Early [[Oligocene]] to Present<ref name=Sepkoski2002/> ...il]]s of this genus show that they have existed at least since the [[Early Oligocene]], about 30 [[million years ago]].<ref name=Sepkoski2002>{{cite journal | a ...

| fossil_range = [[Oligocene]] - Recent ...North America]] were distinct landmasses during much of the [[Eocene]] and Oligocene, they experienced intermittent migration events across the shallow sea sepa ...

...a, Y.S. A new species of ''Lates'' (Teleostei: Perciformes) from the Lower Oligocene of Egypt, Journal of Vertebrate Paleontology, 2004, 24(2):299–308</ref> === Extant species === ...