Look up · dinosaur 37 of 1,425
early long-neck
Ahvaytum
Say it like this: “ah-VAY-tum”
Ahvaytum bahndooiveche
Ahvaytum ate plants and walked on two legs. It lived in the Late Triassic. Bones have been found in the United States.
- When
- Late Triassic (Carnian) · roughly 237 to 227.3 million years ago
- Named in
- 2025 · Lovelace, D. M.; Kufner, A. M.; Fitch, A. J.; Curry Rogers, K.; Schmitz, M.; Schwartz, D. M.; LeClair-Diaz, A.; St.Clair, L.; Mann, J.; Teran, R.
- Hip height
- Not established
- Length
- Not established
- Weight
- Not established
- Found in
- the United States · Popo Agie
- Food and walking
- Herbivore · Two legs
- Kind
- early long-neck · Sauropodomorph
- Family branch
- Sauropodomorpha
The story in short
In 2025, D. M. Lovelace and colleagues published the name Ahvaytum. The name means “long ago.”
It lived in the Late Triassic (Carnian), roughly 237 to 227.3 million years ago. Finds come from the United States, including the Popo Agie Formation. It was a herbivore and walked on two legs.
The fossils of Ahvaytum are too incomplete for a responsible length, hip height, or weight, so those fields are left blank on purpose.
On the family tree it sits in Sauropodomorpha, among the early long-necked dinosaurs.
Close relatives
Agrosaurus
Agrosaurus macgillivrayi
Late Triassic (Rhaetian) · roughly 205.7 to 201.4 million years ago
Arcusaurus
Arcusaurus pereirabdalorum
Early Jurassic (Hettangian · Sinemurian) · roughly 201.4 to 192.9 million years ago
Asylosaurus
Asylosaurus yalensis
Late Triassic (Rhaetian) · roughly 205.7 to 201.4 million years ago