Omnisaura

Dinosaur genus

Acantholipan

Rivera-Sylva et al. 2018

Acantholipan is a dinosaur genus known from bones, found in rocks 83.6–72.2 million years old, in Mexico.

Confidence labels
How sure are we?0 high7 medium4 lowHow we rate confidence

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
83.6–72.2 Ma
Triassic
Jurassic
Cretaceous
252 million years ago20114366

The last non-bird dinosaurs died out 66 million years ago. That's as far from us as the end of this bar.

Named by
Rivera-Sylva et al. 2018
mediummedium: Only PBDB gives this; nothing contradicts it.
Sources

Given by: Paleobiology Database. How it was chosen: PBDB leads.

Described in
H. E. Rivera-Sylva, E. Frey, W. Stinnesbeck, G. Carbot-Chanona, I. E. Sanchez-Uribe, J. R. Guzman-Gutierrez (2018). Paleodiversity of Late Cretaceous Ankylosauria from Mexico and their phylogenetic significance. Swiss Journal of Palaeontology 137(1): 83–93. Read it
mediummedium: Only PBDB gives this; its author and year match the naming authority (Rivera-Sylva et al. 2018).
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
Acantholipan gonzalezi
mediummedium: Only PBDB gives this; nothing contradicts it.
Sources

Given by: Paleobiology Database. How it was chosen: PBDB leads.

Lived
Campanian, 83.6–72.2 million years ago
mediummedium: Only PBDB gives this; nothing contradicts it.
Omnisaura calculation83.6–72.2 million years ago, from its dated fossil records
lowlow: Omnisaura's calculation from only 1 dated record(s).
Sources

Given by: Paleobiology Database. How it was chosen: PBDB leads.

Fossils found in
Mexico
lowlow: Only one PBDB record.
Sources

Given by: Paleobiology Database. How it was chosen: Union of all sources (ISO 3166).

Rock formations
Pen
lowlow: Only one PBDB record.
Sources

Given by: Paleobiology Database. How it was chosen: Canonical names, automatic and editor-approved matches applied.

Family
Nodosauridae
mediummedium: Only PBDB gives this; nothing contradicts it.
Sources

Given by: Paleobiology Database. How it was chosen: PBDB leads.

Parent group
Nodosauridae
mediummedium: Only PBDB gives this; nothing contradicts it.
Sources

Given by: Paleobiology Database. How it was chosen: PBDB leads.

Species named in its records
Acantholipan gonzalezi
Sources

Given by: Paleobiology Database (the species its fossil records are identified as).

Diet
herbivore (inferred for its group)
mediummedium: Only PBDB gives this, and it infers it for the whole of Ornithischia, the group this genus belongs to, not from this genus's own fossils.
Sources

Given by: Paleobiology Database. How it was chosen: PBDB, inferred from a group the genus belongs to.

Way of life
ground dwelling, gregarious (inferred for its group)
lowlow: PBDB infers this way of life for the whole of Ornithischia; behaviour is rarely known for one genus.
Sources

Given by: Paleobiology Database. How it was chosen: PBDB, inferred from a group the genus belongs to.

Known from
Bones
Sources

Given by: Paleobiology Database (what the name was based on).

Sources: Paleobiology Database (CC BY 4.0), Wikidata (CC0 1.0)Confidence levels and gaps are Omnisaura's own assessment.

Gaps are answers

What isn't known yet

  • Order: 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: 6 facts come from a single source with nothing against them (rated medium): authority (PBDB); type species (PBDB); parent group (PBDB); family (PBDB); age (headline) (PBDB); diet (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…?

?

Same time, different places. Their fossils overlap in age, 83.6 to 72.2 million years ago, but no rock formation holds both.

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 Acantholipan by where and when their fossils were found, by classification and by who named them. Select a name to open its page.

AcantholipanSame familySame naming authorAlso found in MexicoAnimantarxAnoplosaurusBorealopeltaEdmontoniaand 13 moreXenovenatorSpheroolithusCoahuilasaurusContinuoolithusLabocaniaand 6 more

Named by Rivera-Sylva 1

Genera whose naming authority includes the same surname. The authority has no initials, so different people who share a surname can appear together.

Xenovenator

Found in Mexico 10

Other genera found in Mexico, from rocks of overlapping age, the most fossil sites there first.

SpheroolithusCoahuilasaurusContinuoolithusLabocaniaMagnapauliaXenovenatorAgujaceratopsPorituberoolithusPrismatoolithusVelafrons

Credits

Where this page comes from

  • Paleobiology DatabaseCC BY 4.0 · fossil records, ages, classification
  • WikidataCC0 1.0 · names and identifiers
  • 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

Pictures linked from this page are credited beside each one, with their own licences; the full list is in the JSON download.