An Oligocene species, A. prisca, was published from the London Clays of England eight years earlier in 1926 by Chandler and Reid.
although some Bennettitales appear to have survived into Oligocene times in Tasmania and eastern Australia.
The fossil record shows that this species grew in the Caribbean region as long ago as the Oligocene Era (34 to 23 million years ago).
Zamites is a genus of fossil tree known from the Mesozoic of North America, Europe and India through the Oligocene of North America.
Oligocene shingle (Vallendar facies) overlies the older surface near Kettenbach and Hausen über Aar.
The oldest group of specimens was recovered from the late Oligocene age Kukak Bay flora exposed on the Katmai National Park and Preserve along the Shelikof Strait in Alaska.
The Bembridge Beds are strata forming part of the fluvio-marine series of deposits of Oligocene age, in the Isle of Wight and Hampshire, England.
Recent molecular evidence suggests that pinnipeds evolved from a bearlike ancestor about 23 million years ago during the late Oligocene or early Miocene epochs, a transitional period between the warmer Paleogene and cooler Neogene period.
Around the Oligo-Miocene boundary, Castanopsis grew abundantly along rivers and in bogs and swamps of then-subtropical Europe.
The La Garita Caldera is a large volcanic caldera located in the San Juan Mountains in southwestern Colorado, United States, and is one of a number of calderas that formed during a massive ignimbrite flare-up in Colorado, Utah, and Nevada during the Oligocene Epoch.
Sanders, W.J., Kappelman, J. & Rasmussen, D. T., (2004), New large-bodied mammals from the late Oligocene site of Chilga, Ethiopia.
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It is known from late Oligocene (27 to 28 million years old) fossil teeth found in the Ethiopian district of Chilga.
The continental sandstones and siltstones of the Abu Zenima Formation represent the earliest syn-rift deposits of late Oligocene (Chattian) to early Miocene (Aquitanian) age.
Bothromicromus Scudder, 1878 (Eocene/Oligocene; Quesnel, British Columbia)
The fossil was a single forewing recovered from the Lower Oligocene in Aix-en-Provence, France.
The remains of Parvigrus pohli have been described from fossils found in Vachères in France, from rocks from the Lower Oligocene.
Placement of the Late Eocene/Early Oligocene genera Palaeotyto and Palaeobyas from Quercy (France) in this family is tentative; they might belong to the Sophiornithidae instead.