Athenar bermani

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 braincase and skull roof 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 bermani

J. A. Whitlock, J. P. Garderes, P. Gallina & M. C. Lamanna · CC BY 4.0 · via Wikipedia/Commons. May be a photograph of a specimen, or an artist’s reconstruction — an interpretation of a skeleton, since colour and soft tissue are almost never preserved.

On record

Recorded, not inferred
Sits inside
AthenarPBDB
Diet
herbivorePBDB, for Sauropoda
Life habit
ground dwelling, gregariousPBDB, for Sauropoda
Motility
actively mobilePBDB, for Sauropoda
Environment
terrestrialPBDB, for Sauropoda

Time the record covers

At most 4.2 million years on record.

The one occurrence read is dated to somewhere between 149.2 Mya and 145.06 Mya, which is a dating window rather than a span.

Late Jurassic — about 1 of 1 occurrenceLate Jurassic149–149 Mya — about 0.0 occurrences149–149 Mya — about 0.0 occurrences149–149 Mya — about 0.0 occurrences149–149 Mya — about 0.0 occurrences149–149 Mya — about 0.0 occurrences149–148 Mya — about 0.0 occurrences148–148 Mya — about 0.0 occurrences148–148 Mya — about 0.0 occurrences148–148 Mya — about 0.0 occurrences148–148 Mya — about 0.0 occurrences148–147 Mya — about 0.0 occurrences147–147 Mya — about 0.0 occurrences147–147 Mya — about 0.0 occurrences147–147 Mya — about 0.0 occurrences147–147 Mya — about 0.0 occurrences147–147 Mya — about 0.0 occurrences147–146 Mya — about 0.0 occurrences146–146 Mya — about 0.0 occurrences146–146 Mya — about 0.0 occurrences146–146 Mya — about 0.0 occurrences146–146 Mya — about 0.0 occurrences146–146 Mya — about 0.0 occurrences146–145 Mya — about 0.0 occurrences145–145 Mya — about 0.0 occurrences145–145 Mya — about 0.0 occurrences145–145 Mya — about 0.0 occurrences149.7 Mya144.6 Mya

1 occurrence of Athenar bermani on record, most of them in the Late Jurassic. Bar height is expected occurrences, not a count: each fossil is spread across the span it is dated to, so a tall narrow bar means tight dating and a low wide one means loose.

When

1 occurrences

These are dates about fossils, not the animal: the record can only begin after it arose and end before it died out, so either end may reach further. Shares are expected occurrences: a fossil dated to a span is counted partly in each period it straddles. More on what this infers.

Found in

1 formation

Morrison — 40.44°N, 109.30°W

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The named rock units Athenar bermani has been recovered from, largest first. Drawn where the rock is now, not where it formed.

Athenar bermani and its relatives

Late Jurassic

Where Athenar bermani and its relatives were recorded in the Late Jurassic.

Found in the same rock

27 taxa

The Paleobiology Database records 1 site for Athenar bermani, and this reads all of them. The number is how many of those sites it was catalogued from too. The 24 sharing the most are listed.

This is not a list of everything alive at the time. It is only what has come out of the same ground as this animal and been written down.

Entered from

1 reference

Each of the 1 occurrence read was entered from one of these publications, ordered by how many each accounts for. This is not a search for papers mentioning the name. Each entry links to doi.org. Relayed as the Paleobiology Database holds them, not checked against what they resolve to.

Media and terms

Media content1

Picture of Athenar bermani

Credit
J. A. Whitlock, J. P. Garderes, P. Gallina & M. C. Lamanna
Licence
CC BY 4.0
Commercial use
the licence allows it

No 3D scan of Athenar bermani was found in Sketchfab.

Smithsonian Open Access and MorphoSource were not reached for this taxon, so this list is what the others held rather than everything there is.

The description on this site

Licence
CC BY-SA 4.0

This is what the site found, which is not the same as what exists.

Keep going

What may have been alongside itAthenar through timeFormations of the Late JurassicThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. Whitlock et al. 2025