The Oligocene (IPA: /ˈɒlɪɡəsiːn, -ɡoʊ-/ OL-ə-gə-seen, -⁠goh-) is a geologic epoch of the Paleogene Period and extends from about 33.9 million to 23 million...

(H) K–Pg Tr–J P–Tr Cap Late D O–S The Eocene–Oligocene extinction event, also called the Eocene-Oligocene transition (EOT) or Grande Coupure (French for...

the Oligocene onward, belonging to several lineages: Wieslochia (Early Oligocene of Frauenweiler, Germany) - suboscine Resoviaornis (Early Oligocene of...

particularly during the Paleocene–Eocene Thermal Maximum. However, the Eocene to Oligocene transition and the Quaternary glaciation dried and cooled Earth. Cenozoic...

Cretaceous Period. This period consists of the Paleocene, Eocene, and Oligocene epochs. The end of the Paleocene (56 Mya) was marked by the Paleocene–Eocene...

bulbosa (Tasmania, Early Oligocene) †Nothofagus cethanica (Tasmania, Early Oligocene) †Nothofagus cooksoniae (Tasmania, Early Oligocene) †Nothofagus crenulata...

geologic timescale, the older of two ages or the lower of two stages of the Oligocene Epoch/Series. It spans the time between 33.9 and 27.82 Ma. It is preceded...

has. The Miocene is preceded by the Oligocene and is followed by the Pliocene. As Earth went from the Oligocene through the Miocene and into the Pliocene...

hypercarnivorous diets that made them prone to extinction.: Fig. 1  By the Oligocene, all three subfamilies of canids (Hesperocyoninae, Borophaginae, and Caninae)...

geologic timescale, the younger of two ages or upper of two stages of the Oligocene Epoch/Series. It spans the time between 27.82 and 23.03 Ma. The Chattian...

05 Ma to 15.97 ± 0.05 Ma (million years ago). It was preceded by the Oligocene epoch. As the climate started to get cooler, the landscape started to...

Eocene/Early Oligocene) includes "Bubo" incertus Selenornis (Late Eocene/Early Oligocene) – includes "Asio" henrici Necrobyas (Late Eocene/Early Oligocene – Late...

insects, birds, frogs and the tuatara. In the Duntroonian stage of the Oligocene, the land area of Zealandia was at a minimum. It has been suggested that...

Neotethys formed during the Late Triassic and lasted in some form up to the Oligocene–Miocene boundary (about 24–21 million years ago) when it completely closed...

origin) and sometimes in Amphipithecidae, thought to originate in the Early Oligocene. Additionally, Phileosimias is sometimes placed in the Eosimiidae and...

the time from the end of the Paleocene Epoch to the beginning of the Oligocene Epoch. The start of the Eocene is marked by a brief period in which the...

Paleogene ruminants that lived in Europe from the late Eocene to the late Oligocene. The genus was erected in 1882 by Henri Filhol based on fossil remains...

terrestrial mammals that has ever existed and lived from the early to late Oligocene epoch (34–23 million years ago). The first fossils were discovered in...

forms and the emergence of cervids from the Oligocene to the early Pliocene. The latter half of the Oligocene (28–34 Mya) saw the appearance of the European...

Genus Nocturnavis (Late Eocene/Early Oligocene) – includes Bubo incertus Genus Necrobyas (Late Eocene/Early Oligocene – Late Miocene, France) – includes...

from Oligocene with unclear systematic position. It was originally described from a jaw fragment for P. asiaticus, from Mongolia, Middle Oligocene. The...

Paraentelodon is an extinct entelodont from the Late Oligocene and Oligocene-Miocene boundary of Asia. The fossils of the type species P. intermedium...

Formation. Animals from the White River Badlands date from the Eocene, Oligocene, the Miocene, and the Pliocene Epochs. Genera include: Category:White...

Kekenodontidae is an extinct family of non-neocete pelagicetes from the Late Oligocene (Chattian) of New Zealand. Although at times classified as basal mysticetes...

World likely via a trans-Atlantic route during the Oligocene. Their presence in the early Oligocene of Europe is well documented by several fossil specimens...

Eoarctos vorax (Nov. Gen. Et sp.) from Fitterer Ranch, North Dakota (Early Oligocene) and systematics and phylogeny of North American early arctoids (Carnivora...

(Late Eocene -? Late Oligocene of France) Genus Belgirallus (Early Oligocene of WC Europe) Genus Rallicrex (Corbula Middle/Late Oligocene of Kolzsvár, Romania)...

its successors (the Mediterranean Sea or the Indian Ocean) during the Oligocene and the early and middle Miocene times, but at the onset of the late Miocene...

and baleen-assisted mysticetes in the northwestern Pacific during the Oligocene. Nobile et al. (2024) describe fossil material of a member of the genus...

the other 34 species in 12 genera. The first cats emerged during the Oligocene about 25 million years ago, with the appearance of Proailurus and Pseudaelurus...