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#Oligocene

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Palaeontologia Electronica

The John Day Fossil Beds National Monument (JODA) preserves a fantastic record of Oregon's #Eocene and #Oligocene environments. A new study examines several JODA trackways to further understand fauna and their behaviors in these changing ecosystems.

Image: Figure 2 from the paper. Digital elevation model (DEM) of avian tracks from JODA 1536. Scale bar equals ~20mm.

Authors: Conner J Bennett, Nicholas A Famoso, and Daniel I Hembree

Full #OpenAccess Paper:
doi.org/10.26879/1413

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Lukas VFN 🇪🇺

Three new ancestors added to #TasmanianTiger's storyline phys.org/news/2024-09-ancestor

Three new #thylacinids (Marsupialia, Thylacinidae) from late Oligocene deposits of the #Riversleigh World Heritage Area, northwestern #Queensland tandfonline.com/doi/full/10.10

"#paleontologists say the #NewSpecies are now the oldest members of the #Thylacine family to date, estimated to be 25–23 million years old, making them late #Oligocene in age."

Illustration of multiple species of prehistoric mammals. By Peter Schouten.
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Lukas VFN 🇪🇺

#Penguin wing #fossil shows importance of #Zealandia in penguin #evolution phys.org/news/2024-08-penguin-

A new tiny fossil penguin from the Late #Oligocene of #NewZealand and the morphofunctional transition of the penguin wing tandfonline.com/doi/full/10.10

Named Pakudyptes hakataramea, the penguin was very small—about the same size as the little blue penguin, the smallest in the world—with anatomical adaptations that allowed it to dive.

reconstruction of a prehistoric penguin with a long beak
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Lukas VFN 🇪🇺

New #fossil snake species provides insight into reptile social behavior and development
phys.org/news/2024-07-fossil-s

Morphology and systematics of a new fossil #snake from the early #Rupelian (#Oligocene) White River Formation, #Wyoming academic.oup.com/zoolinnean/ad

"The specimens were preserved in a cluster within a hibernaculum, a space where #animals shelter together during colder months. Their position represents social behavior in #snakes, which is something that we don't often see"

Photo of a fossil of multiple complete snake skeletons
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Lukas VFN 🇪🇺

Oligocene (Pt 9): Rise of the Dogs synapsida.blogspot.com/2024/06

"Many of the carnivorous #mammals present in North America during the #Oligocene were of types also found in Eurasia. However, this far back in time, they did not necessarily belong to any family of #animals we would recognise. Cats, for example, first appeared in Europe at the end of the epoch and did not reach the Americas until much later. Other groups, such as raccoons, simply didn't exist yet."

drawing of a skull of a prehistoric carnivorous mammal
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Lukas VFN 🇪🇺

#Oligocene-Period #Dolphin Had Unique Feeding Method sci.news/paleontology/aureia-r

#Aureia rerehua, a new platanistoid dolphin from the Oligocene of #NewZealand with a unique feeding method tandfonline.com/doi/full/10.10

"Aureia rerehua had unique #teeth which might have formed a cage around small #fish; these teeth, along with a weak vertex, flexible neck, and the smallest size among its relatives would make it a capable hunter in shallow waters"

drawing of a fossil dolphin skull from multipple angles
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