Dinosaurs A to Z
Dicraeosauridae

Athenar bermani

Generic sauropod body-plan outline
You 1.8 m (5.9 ft) tall
Athenar 5 m (16.4 ft) long
as long as 3 people standing fingertip to fingertip
generic sauropod body plan, scaled to length — not a silhouette of Athenar
Length
5 m (16.4 ft)
Period
Late Jurassic (163–145 Mya)
Place
United States · Utah, USA
Food
Herbivore
Clade
Dicraeosauridae
Athenar reconstruction by Connor Ashbridge
Reconstruction · Connor Ashbridge (CC-BY)

Athenar is an extinct genus of dicraeosaurid sauropod dinosaur from the Late Jurassic of Utah, United States. The genus contains a single species, Athenar bermani, which was described by John Whitlock and colleagues in 2025 based on the holotype specimen CM 26552: a and previously ascribed to the genus Diplodocus. The specimen was found in rocks belonging to the Morrison Formation at the Carnegie Quarry at Dinosaur National Monument.

Athenar existed during the Tithonian age of the Late Jurassic, and would have lived alongside other dinosaurs such as the carnivorous Allosaurus and the herbivorous Stegosaurus, Diplodocus and Camptosaurus.

What we know

  • Named by Whitlock et al., 2025.
  • Fossils found in United States and Utah, USA.

What we guess

The reconstruction notes for Athenar — soft tissue, color, behavior — haven't been written up yet. Only the recorded basics above are filled in so far.