The Eocene (IPA: /ˈiːəsiːn, ˈiːoʊ-/ EE-ə-seen, EE-oh-) is a geological epoch that lasted from about 56 to 33.9 million years ago (Ma). It is the second...

The Paleocene–Eocene thermal maximum (PETM), alternatively "Eocene thermal maximum 1" (ETM1), and formerly known as the "Initial Eocene" or "Late Paleocene...

years ago (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...

sparsity of extant forms of molluscs. The Oligocene is preceded by the Eocene Epoch and is followed by the Miocene Epoch. The Oligocene is the third and...

consists of the Paleocene, Eocene, and Oligocene epochs. The end of the Paleocene (56 Mya) was marked by the Paleocene–Eocene Thermal Maximum, one of the...

of the Eocene. It spans the time between 56 and 47.8 Ma, is preceded by the Thanetian Age (part of the Paleocene) and is followed by the Eocene Lutetian...

warmer than today, particularly during the Paleocene–Eocene Thermal Maximum. However, the Eocene to Oligocene transition and the Quaternary glaciation...

The Early Eocene Climatic Optimum (EECO), also referred to as the Early Eocene Thermal Maximum (EETM), was a period of extremely warm greenhouse climatic...

palaiós meaning "old" and the Eocene Epoch (which succeeds the Paleocene), translating to "the old part of the Eocene". The epoch is bracketed by two...

Eocene Thermal Maximum 2 (ETM-2), also called H-1 or Elmo (Eocene Layer of Mysterious Origin), was a transient period of global warming that occurred...

Two immature specimens of polyxenidan millipedes are described from the Eocene Bitterfeld amber (Germany) by Haug et al. (2018). First known millipede...

and Asia, died out at the beginning of the Upper Eocene. Equoidea (equines) also developed in the Eocene. Palaeotheriidae are known mainly from Europe;...

Vasuki is an extinct genus of madtsoiid snake from the Middle Eocene Naredi Formation of India. The genus contains a single species, V. indicus, known...

Australia until the Pleistocene, they largely went extinct elsewhere during the Eocene. However, some species persisted in South America and India through the...

The Middle Eocene Climatic Optimum (MECO), also called the Middle Eocene Thermal Maximum (METM), was a period of very warm climate that occurred during...

(Early Eocene of Wyoming, U.S.) Palaeoglaux (Middle-Late Eocene of West-Central Europe) own family Palaeoglaucidae or Strigidae? Palaeobyas (Late Eocene/Early...

extinct genus of primate from the Eocene Nadu Formation of China. Living about 35 million years ago during the late Eocene, Palaeohodites belongs to an extinct...

The paleofauna of the Eocene Okanagan Highlands consists of Early Eocene arthropods, vertebrates, plus rare nematodes and molluscs found in geological...

inherit (the reduction of digit I and V for example). By the start of the Eocene, 55 million years ago (Mya), they had diversified and spread out to occupy...

the Early Eocene of Monte Bolca, Italy. The following anchovy taxa are known: Superfamily Engrauloidea Genus †Clupeopsis (fossil; Early Eocene of Belgium)...

Eocene Peak is a granitic summit with an elevation of 11,569 feet (3,526 m) located on the crest of the Sierra Nevada mountain range, in northern California...

families are known, spanning across the Northern Hemisphere, from the Early Eocene to the early Pliocene, including a variety of flightless forms like the...

family. The earliest fossil species of the family date back to the Late Eocene epoch, with earlier origins suspected. Colubrid snakes are found on every...

definitive salmonids appear before the Eocene. The Salmonidae first appear in the fossil record in the Early Eocene with Eosalmo driftwoodensis, a stem-salmonine...

the genus Protosiren representing the first sirenians reported from the Eocene (Bartonian) ornamental limestone from the Eastern Desert (Egypt). Vitek...

(Cretaceous-Eocene; Canada, China, Denmark) †Adamsochrysa Makarkin & Archibald, 2013 (Eocene; Canada, United States) †Archaeochrysa (Eocene - Oligocene)...

the Eocene La Meseta Formation (Seymour Island, Antarctica), interpreted by the authors as likely apex predator of Antarctica during the Eocene. A study...

ancestors that resembled modern duikers and diminutive deer in the early Eocene, and gradually developed into the first antlered cervoids (the superfamily...

years ago. Suina (including pigs) have been around since the Eocene. In the late Eocene or the Oligocene, two families stayed in Eurasia and Africa; the...

family Pakicetidae, which was endemic to Pakistan during the Ypresian (early Eocene) period, roughly 50 million years ago. It was a wolf-like animal, about...