Hildoceras
Searched as Hildoceras sublevisoni sulcosa. The Paleobiology Database treats Hildoceras as the accepted name.

Uncredited · via Wikidata/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
- HildoceratinaePBDB
- Diet
- carnivorePBDB, for Ammonoidea
- Life habit
- nektonicPBDB, for Ammonoidea
- Motility
- fast-movingPBDB, for Ammonoidea
- Vision
- well-developedPBDB, for Cephalopoda
- Environment
- marinePBDB, for Cephalopoda
Time the record covers
At most 8.2 million years on record.
Every occurrence read is dated to somewhere between 182.9 Mya and 174.7 Mya, and nothing in the dating separates them, so that window is what the record shows rather than a span.
2 occurrences of Hildoceras on record, most of them in the Early 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
2 occurrences- Early Jurassic100%
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
Loading coastlines…
The named rock units Hildoceras has been recovered from, largest first. Drawn where the rock is now, not where it formed.
Hildoceras and its relatives
Early JurassicWhere Hildoceras and its relatives were recorded in the Early Jurassic.
Found in the same rock
166 taxa- Calliphylloceras33 sites
- Calliphylloceras nilssoni28 sites
- Harpoceras falciferum28 sites
- Nodicoeloceras23 sites
- Phylloceras heterophyllum23 sites
- Phylloceras22 sites
- Mercaticeras20 sites
- Phymatoceras20 sites
- Phylloceras doderleinianum19 sites
- Polyplectus pluricostatus19 sites
- Harpoceras18 sites
- Harpoceras subplanatum16 sites
- Dactylioceras commune14 sites
- Harpoceras (Harpoceras) mediterraneum14 sites
- Lytoceras14 sites
- Lytoceras cornucopia14 sites
- Phymatoceras elegans13 sites
- Pseudomercaticeras12 sites
- Catacoeloceras10 sites
- Catacoeloceras crassum10 sites
- Mercaticeras umbilicatum10 sites
- Pseudolioceras lythense10 sites
- Frechiella kammerkarensis9 sites
- Frechiella subcarinata9 sites
The Paleobiology Database records 325 sites for Hildoceras, and this reads 240 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 referenceEach of the 2 occurrences 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 the Paleobiology Database's own record for the work.
Media and terms
Media content2

Picture of Hildoceras
- Source
- Wikidata/Commons
- Credit
- nobody named on the record
- Licence
- not stated by the source
- Commercial use
- cannot be read from the licence given — check the record
3D model
- Source
- Sketchfab
- Licence
- CC Attribution
- Commercial use
- cannot be read from the licence given — check the record
Smithsonian Open Access and MorphoSource were not reached for this taxon, so this list is what the others held rather than everything there is.
This is what the site found, which is not the same as what exists.
Keep going
What may have been alongside itHildoceratinae through timeFormations of the Early JurassicThe world it lived on
Occurrence data from the Paleobiology Database, CC BY 4.0.