Haploceratidae
The Haploceratidae is the type family of the Haploceratoidea, a superfamily in the ammonitina; which according to Donovan et al. (1981) can be derived from the Taramelliceratinae, a subfamily of the Oppeliidae.

Not Haploceratidae. This is Cadomoceras Munier-Chalmas, 1892, a relative — both are Haploceratidae.
Yale Peabody Museum · CC0 · via GBIF. 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
- HaploceratoideaPBDB
- 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 least 35 million years on record.
The record covers at least 168.2 Mya to 132.6 Mya. No occurrence read is dated outside 170.9 Mya to 121.4 Mya.
739 occurrences of Haploceratidae on record, most of them in the Early Cretaceous. 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
739 occurrences- Middle Jurassicunder 1%
- Late Jurassic23%
- Early Cretaceous77%
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
44 formations
- Miravetes Formation56
- Vaca Muerta Formation · Mendoza Group37
- Rossfeld Formation22
- Bugarone Formation16
- Maiolica Formation14
- Guasasa Formation11
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The named rock units Haploceratidae has been recovered from, largest first. Drawn where the rock is now, not where it formed. 20 further formations hold fewer occurrences each and are not listed. 457 occurrences have no formation on record, which is common for older literature.
Haploceratidae and its relatives
Early CretaceousWhere Haploceratidae and its relatives were recorded in the Early Cretaceous.
Found in the same rock
650 taxa- Neolissoceras grasianum120 sites
- Olcostephanus49 sites
- Tintinnopsella36 sites
- Lytoceras35 sites
- Remaniella32 sites
- Calpionellopsis31 sites
- Haploceras31 sites
- Hypolissoceras carachtheis31 sites
- Bochianites neocomiensis29 sites
- Lorenziella28 sites
- Phylloceras27 sites
- Neolissoceras24 sites
- Thurmanniceras23 sites
- Calcicalathina22 sites
- Euphylloceras thetys22 sites
- Fauriella boissieri22 sites
- Phyllopachyceras infundibulum21 sites
- Lytoceras subfimbriatum19 sites
- Percivalia fenestrata19 sites
- Thurmanniceras pertransiens19 sites
- Tirnovella alpillensis19 sites
- Berriasella calisto18 sites
- Protancyloceras18 sites
- Rucinolithus wisei18 sites
The Paleobiology Database records 576 sites for Haploceratidae, 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
83 references- L'évolution des ammonites du Valanginien-Hauterivien inférieur du bassin Vocontien et de la plate-form Provençale (sud-est de la France): relations avec la stratigraphie séquentielle et implications biostratigraphiques308
- The Berriasian/Valanginian boundary in the Mediterranean region: new data from the Caravaca and Cehegin sections, SE Spain44
- The Tithonian ammonite fauna of the transect Cerro Lotena Cerro Granito, Vaca Muerta Formation, Argentina. I. Family Himalayitidae26
- A new ammonite fauna from the Tithonian (Semiformiceras/Verruciferum Zone) of the Lessinian Alps, Verona Province, Northern Italy23
- Die Cephalopoden aus den Rossfeldschichten der Reichraminger Decke (Obervalanginium, oberösterreichische Kalkalpen) [Cephalopods from the Rossfeld Formation of the Reichraming Nappe (Late Valanginian, Northern Calcareous Alps, Upper Austria)]19
- Early Crioceratites (heteromorphic ammonites) from the lower Hauterivian of south-eastern France: systematics, intraspecific variation and biostratigraphic implications18
- Ammonite biostratigraphy of the Tithonian of Western Cuba16
- Biostratigrafia ed ammoniti del Dogger-Malm di Colle Tordina (Monti della Rossa, Appennino marchigiano)16
- Los ammonites del transito Berriasense-Valanginiense en la region de Cehegin (Prov. de Murcia, SE de España)16
- Valanginian and early Hauterivian ammonite successions in the Mt Catria group (Central Apennines) and the Lessini Mts (Southern Alps), Italy15
- Integrated isotope and biostratigraphy of a Lower Cretaceous section from the Bakony Mountains (Transdanubian Range, Hungary): A new Tethyan record of the Weissert event13
- Integrated Lower Cretaceous biostratigraphy of the Bersek Quarry, Gerecse Mountains, Transdanubian Range. Hungary11
Each of the 739 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. 71 further references are not listed. Entries link to doi.org where the Paleobiology Database holds an identifier, and to its own record where it does not. Relayed as the Paleobiology Database holds them, not checked against what they resolve to.
Media and terms
Media content1

Picture of Cadomoceras Munier-Chalmas, 1892
- Source
- GBIF
- Credit
- Yale Peabody Museum
- Licence
- CC0
- Commercial use
- the licence allows it
No 3D scan of Haploceratidae was found in MorphoSource and Sketchfab.
Smithsonian Open Access was not reached for this taxon, so this list is what the others held rather than everything there is.
The description on this site
- Licence
- CC BY-SA 4.0
This is what the site found, which is not the same as what exists.
Keep going
What may have been alongside itHaploceratoidea through timeFormations of the Early CretaceousThe world it lived on
Occurrence data from the Paleobiology Database, CC BY 4.0. Zittel 1884