Girtyoceras

Moore, Raymond C.; Ockerman, J. W. · CC BY 4.0 · 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
- GirtyoceratidaePBDB
- Diet
- carnivorePBDB, for Ammonoidea
- Life habit
- nektonicPBDB, for Goniatitida
- Motility
- fast-movingPBDB, for Ammonoidea
- Vision
- well-developedPBDB, for Cephalopoda
- Environment
- marinePBDB, for Cephalopoda
Time the record covers
At least 32 million years on record.
The record covers at least 339.9 Mya to 307 Mya. No occurrence read is dated outside 358.86 Mya to 303.7 Mya.
73 occurrences of Girtyoceras on record, most of them in the Carboniferous. 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
73 occurrences- Carboniferous100%
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
7 formations
- Chainman Formation17
- Barnett Formation6
- Moorefield Formation3
- Carraun Shale Formation3
- Myslejovice Formation1
- Lower Limestone Formation · Clackmannan Group1
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The named rock units Girtyoceras has been recovered from, largest first. Drawn where the rock is now, not where it formed. 41 occurrences have no formation on record, which is common for older literature.
Girtyoceras and its relatives
CarboniferousWhere Girtyoceras and its relatives were recorded in the Carboniferous.
Found in the same rock
207 taxa- Dombarocanites chancharensis27 sites
- Megapronorites sakmarensis26 sites
- Praedaraelites aktubensis26 sites
- Irinoceras arcuatum23 sites
- Kazakhoceras hawkinsi20 sites
- Uralopronorites mirus20 sites
- Cravenoceras leionoides19 sites
- Platygoniatites molaris19 sites
- Dombarocanites catillus16 sites
- Tympanoceras trisulcatum15 sites
- Dombarites carinatus13 sites
- Eumorphoceras (Sulcogirtyoceras) weetsense13 sites
- Lusitanites subcircularis12 sites
- Lyrogoniatites mutabilis12 sites
- Sudeticeras grande11 sites
- Dombarites falcatoides10 sites
- Dombarites liratus10 sites
- Neogoniatites milleri10 sites
- Arcanoceras burmai9 sites
- Ferganoceras elegans9 sites
- Tympanoceras porrectum9 sites
- Cravenoceras crassum8 sites
- Neoglyphioceras caneyanum8 sites
- Platygoniatites omniliratus8 sites
The Paleobiology Database records 65 sites for Girtyoceras, and this reads all 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
11 references- Namurskiy etap v evolyutsii ammonoidey. Rannenamyurskie ammonoidei39
- Goniatites Zone (middle Mississippian) ammonoids of the Antler Foreland Basin (Nevada, Utah)17
- Late Viséan (late Mississippian) ammonoids from the Barnett Shale, Sierra Diablo Escarpment, Culberson County, Texas, USA3
- The upper Visean and Namurian Shales of the Doagh Outlier, County Fermanagh, Northern Ireland3
- Upper Paleozoic ammonites in Texas3
- Carboniferous Cephalopods of Arkansas2
- The Cephalopod Fauna of the Mississippian Barnett Formation of Central Texas2
- Late Viséan (Mississippian) ammonoids (Cephalopoda) from the Central Moroccan Meseta1
- Late Palaeozoic mollusc reproduction: cephalopod egg-laying behaviour and gastropod larval palaeobiology1
- New finds of trilobites in the Culm of the Drahanska vrchovina Upland (Moravia, Czechoslovakia)1
- Scottish Carboniferous Goniatites1
Each of the 73 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. 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 Girtyoceras
- Source
- GBIF
- Credit
- Moore, Raymond C.; Ockerman, J. W.
- Licence
- CC BY 4.0
- Commercial use
- the licence allows it
No 3D scan of Girtyoceras was found in Sketchfab.
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 itGirtyoceratidae through timeFormations of the CarboniferousThe world it lived on
Occurrence data from the Paleobiology Database, CC BY 4.0. Wedekind 1918