Metoicoceras
Metoioceras is an extinct genus of cephalopod belonging to the Ammonite subclass which lived during the Cenomanian.

Peter Massicard · CC BY 4.0 · via Wikipedia/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
- MammitinaePBDB
- 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 29 million years on record.
Every occurrence read is dated to somewhere between 100.5 Mya and 72.2 Mya, and nothing in the dating separates them, so that window is what the record shows rather than a span.
108 occurrences of Metoicoceras on record, most of them in the Late 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
108 occurrences- Late Cretaceous100%
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
31 formations
- Belle Fourche Formation17
- Mancos Shale Formation14
- Tropic Shale Formation9
- Greenhorn Formation · Colorado Group6
- Britton Formation · Eagle Ford Group6
- Dölzschen Formation6
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The named rock units Metoicoceras has been recovered from, largest first. Drawn where the rock is now, not where it formed. 7 further formations hold fewer occurrences each and are not listed. 6 occurrences have no formation on record, which is common for older literature.
Metoicoceras and its relatives
Late CretaceousWhere Metoicoceras and its relatives were recorded in the Late Cretaceous.
Found in the same rock
345 taxa- Exogyra17 sites
- Sciponoceras gracile17 sites
- Pycnodonte15 sites
- Inoceramus (Inoceramus) pictus14 sites
- Euomphaloceras septemseriatum13 sites
- Lucina12 sites
- Turritella11 sites
- Corbula10 sites
- Plicatula10 sites
- Allocrioceras8 sites
- Drepanocheilus8 sites
- Euspira8 sites
- Calycoceras (Calycoceras) naviculare7 sites
- Inoceramidae7 sites
- Ostreidae7 sites
- Camptonectes6 sites
- Costagyra olisiponensis6 sites
- Dunveganoceras (Dunveganoceras) albertense6 sites
- Gyrodes6 sites
- Inoceramus6 sites
- Pholadomya6 sites
- Pseudocalycoceras angolaense6 sites
- Sciponoceras6 sites
- Worthoceras6 sites
The Paleobiology Database records 95 sites for Metoicoceras, 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
38 references- Cenomanian ammonite fauna from the Mosby Sandstone of central Montana13
- The paleoecology of the Cenomanian-Turonian (Cretaceous) stage boundary extinctions at Black Mesa, Arizona11
- Evolution and biogeography of the Cenomanian (Upper Cretaceous) ammonite Metoicoceras Hyatt, 1903, with a revision of Metoicoceras praecox Haas, 194910
- Paleontology of the Greenhorn cylcothem (Cretaceous: late Cenomanian to middle Turonian) at Black Mesa, northeastern Arizona6
- Cenomanian micromorphic ammonites from the western interior of the USA6
- Upper Cretaceous rocks and ammonite faunas of southwestern New Mexico6
- Larger invertebrate fossils of the Woodbine formation (Cenomanian) of Texas5
- Molluscan fossil record from the northeastern part of the Upper Cretaceous seaway, Western Interior4
- Kreide-Fossilien in Sachsen, Teil 1, 7. Ammoniten3
- Upper Cenomanian-Lower Turonian ammonoids from the Saxonian Cretaceous (lower Elbtal Group, Saxony, Germany)3
- Acanthoceratidae y zonación de ammonites del Cenomaniense superior y del Turoniense inferior en el área de Puentedey, Cuenca Vasco-Cantábrica, España3
- Occurrence and biostratigraphic framework of a plesiosaur from the Upper Cretaceous Tropic Shale of southwestern Utah3
Each of the 108 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. 26 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 content2
Picture of Metoicoceras
- Source
- Wikipedia/Commons
- Credit
- Peter Massicard
- Licence
- CC BY 4.0
- Commercial use
- the licence allows it
3D model
- Source
- Sketchfab
- Credit
- Shellie Luallin
- 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.
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 itMammitinae through timeFormations of the Late CretaceousThe world it lived on
Occurrence data from the Paleobiology Database, CC BY 4.0. Hyatt 1903