66,000,000 years ago today · Cretaceous–Paleogene boundarySaturday, 5 September 2026 · Strictly scientific. Always sourced.
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Two New Rudiomys Species from MontanaCretaceous Birds in Mexico: Why Tracks Are Not SpeciesTwo New Rudiomys Species from MontanaCretaceous Birds in Mexico: Why Tracks Are Not Species
Newsroom · Fossil Finds

Two New Rudiomys Species from Montana

Fossils from Montana and new material from Oregon expand a little-known late Oligocene rodent genus and support a cautious interpretation of habitat specialisation.

Science-checkedSource: New material and two new species of the poorly known rodent Rudiomys (Aplodontiidae: Meniscomyinae) from the late Oligocene John Day Formation of Oregon and the Renova Formation of Montana
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Dinosaurs

Layer 01 · Mesozoikum
All finds
Fossil bones and bird-like footprints of Cretaceous birds from Late Cretaceous MexicoDinosaurs
Dinosaurs

Cretaceous Birds in Mexico: Why Tracks Are Not Species

Bones and bird-like tracks document a recurring presence in Late Cretaceous Mexico, but footprints alone cannot securely identify biological species.

Checked23 h agoSource: Review of Cretaceous Avian Dinosaurs from Mexico: Current Knowledge and Future Perspectives

Sea Reptiles

Layer 02 · Tethys-Ozean
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Evolution

Layer 03 · Tiefe Abstammung
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Fossil Finds

Layer 04 · Weltweit
All finds
Fossil teeth of the three known Rudiomys species from the late OligoceneFossil Finds
Fossil Finds

Two New Rudiomys Species from Montana

Fossils from Montana and new material from Oregon expand a little-known late Oligocene rodent genus and support a cautious interpretation of habitat specialisation.

Checked23 h agoSource: New material and two new species of the poorly known rodent Rudiomys (Aplodontiidae: Meniscomyinae) from the late Oligocene John Day Formation of Oregon and the Renova Formation of Montana

On This Day

Layer 05 · Zeitreise
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Science-checked·Tiefenzeit editorial deskDOI sources·Peer-reviewedLife reconstruction·Flux.2 renderCC BY·Licensed