Dinosaur genus
Ancistrodon
Ancistrodon is a dinosaur genus known from bones, found in rocks 56–48.1 million years old, in Saudi Arabia.
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
- Huxley 1865
medium
medium: Only PBDB gives this; nothing contradicts it.Sources
Given by: Paleobiology Database. How it was chosen: PBDB leads.
- Described in
- T. H. Huxley (1865). On a collection of vertebrate fossils from the Panchet rocks, Ranigunj, Bengal. Palaeontologia Indica 4: 1–24.
medium
medium: Only PBDB gives this; its author and year match the naming authority (Huxley 1865).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.
- Lived
- Ypresian, 56–48.1 million years ago
medium
medium: Only PBDB gives this; nothing contradicts it.Omnisaura calculation56–48.1 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
- Saudi Arabia
low
low: Only one PBDB record.Sources
Given by: Paleobiology Database. How it was chosen: Union of all sources (ISO 3166).
- Rock formations
- Umm al-Rua’us
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
- Dinosauria
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
- Ancistrodon libycus
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
- Type species: no source we use gives it 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.
- Held back: 1 fossil record left out: identified as a related genus rather than this one.
- Resting on one source: 4 facts come from a single source with nothing against them (rated medium): name (PBDB); authority (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. Tyrannosaurus had gone at least 10 million years before Ancistrodon appears in the fossil record.
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 Ancistrodon 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: Dinosauria 5
Other genera in Dinosauria with a full profile.
Named by Huxley 1
Genera whose naming authority includes the same surname. The authority has no initials, so different people who share a surname can appear together.
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