Dinosaur genus
Ahvaytum
Ahvaytum is a dinosaur genus known from bones, found in rocks 237–227.3 million years old, in the United States.
Confidence labels are switched off. Facts with low confidence, or where sources disagree, still carry a small dot: tap it for the reason.
At a glance
Data as of 11 October 2026- Named by
- Lovelace et al. 2025
medium
medium: Only PBDB gives this; nothing contradicts it.Sources
Given by: Paleobiology Database. How it was chosen: PBDB leads.
- Described in
- D. M. Lovelace, A. M. Kufner, A. J. Fitch, K. Curry Rogers, M. Schmitz, D. M. Schwartz, A. LeClair-Diaz, L. St.Clair, J. Mann, R. Teran (2025). Rethinking dinosaur origins: oldest known equatorial dinosaur-bearing assemblage (mid-late Carnian Popo Agie FM, Wyoming, USA). Zoological Journal of the Linnean Society 203: zlae153. Read it
medium
medium: Only PBDB gives this; its author and year match the naming authority (Lovelace et al. 2025).Sources
Given by: Paleobiology Database. The publication the Paleobiology Database gives as the authority for this genus name, usually the one that first named and described it.
- Type species
- Ahvaytum bahndooiveche
medium
medium: Only PBDB gives this; nothing contradicts it.Sources
Given by: Paleobiology Database. How it was chosen: PBDB leads.
- Lived
- Carnian, 237–227.3 million years ago
medium
medium: Only PBDB gives this; nothing contradicts it.Omnisaura calculation237–227.3 million years ago, from its dated fossil recordslow
low: Omnisaura's calculation from only 1 dated record(s).Sources
Given by: Paleobiology Database. How it was chosen: PBDB leads.
- Fossils found in
- United States
low
low: Only one PBDB record.Sources
Given by: Paleobiology Database. How it was chosen: Union of all sources (ISO 3166).
- Rock formations
- Popo Agie
low
low: Only one PBDB record.Sources
Given by: Paleobiology Database. How it was chosen: Canonical names, automatic and editor-approved matches applied.
- Parent group
- Sauropodomorpha
medium
medium: Only PBDB gives this; nothing contradicts it.Sources
Given by: Paleobiology Database. How it was chosen: PBDB leads.
- Species named in its records
- Ahvaytum bahndooiveche
Sources
Given by: Paleobiology Database (the species its fossil records are identified as).
- Known from
- Bones
Sources
Given by: Paleobiology Database (what the name was based on).
Gaps are answers
What isn't known yet
- Order: no source we use gives it yet.
- Family: no source we use gives it yet.
- Diet: no source we use gives it yet.
- Way of life: no source we use gives it yet.
- Common names: no source we use gives it yet.
- What it was named after: no source we use gives it yet.
- Resting on one source: 5 facts come from a single source with nothing against them (rated medium): name (PBDB); authority (PBDB); type species (PBDB); parent group (PBDB); age (headline) (PBDB).
Size and appearance aren't covered yet, and diet and way of life only as PBDB infers them for the wider group. Omnisaura leaves the rest out rather than guess.
Where sources disagree
None open. Where our sources overlap, they agree on everything shown here.
Did it meet…?
No. Ahvaytum had gone at least 143.7 million years before Tyrannosaurus appears in the fossil record, a longer gap than the 66 million years between Tyrannosaurus and today.
Going by the ages and rock formations of their dated fossils, as on the map. Compare their fossil sites on the map.
Connections
Genera linked to Ahvaytum by where and when their fossils were found, by classification and by who named them. Select a name to open its page.
Same parent group: Sauropodomorpha 8
Other genera in Sauropodomorpha with a full profile.
Found in United States 9
Other genera found in United States, from rocks of overlapping age, the most fossil sites there first.
Credits
Where this page comes from
- Paleobiology DatabaseCC BY 4.0 · fossil records, ages, classification
- OmnisauraOmnisaura editorial · confidence levels and gaps
- PaleoMAP PaleoCoastlines (Kocsis and Scotese 2021)CC BY 4.0 · ancient coastlines on the small map
- Natural EarthPublic domain · today's coastlines