Worthoceras

Elder, William · CC BY-NC 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
- OtoscaphitinaePBDB
- 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 12 million years on record.
The record covers at least 106.3 Mya to 93.9 Mya. No occurrence read is dated outside 113.2 Mya to 89.8 Mya.
34 occurrences of Worthoceras 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
34 occurrencesThese 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
13 formations
- Mancos Shale Formation10
- Greenhorn Limestone Formation4
- Springhill Formation · Mangapurupuru Group4
- Tropic Shale Formation3
- Baddeckenstedt Formation2
- Marnes bleues Formation1
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The named rock units Worthoceras has been recovered from, largest first. Drawn where the rock is now, not where it formed. 3 occurrences have no formation on record, which is common for older literature.
Worthoceras and its relatives
Late CretaceousWhere Worthoceras and its relatives were recorded in the Late Cretaceous.
Found in the same rock
150 taxa- Inoceramus (Inoceramus) pictus10 sites
- Pycnodonte10 sites
- Inoceramidae9 sites
- Ammonoidea8 sites
- Ostreidae8 sites
- Sciponoceras8 sites
- Corbula7 sites
- Drepanocheilus7 sites
- Lucina7 sites
- Exogyra6 sites
- Inoceramus6 sites
- Phelopteria6 sites
- Sciponoceras gracile6 sites
- Allocrioceras5 sites
- Euomphaloceras5 sites
- Euspira5 sites
- Metoicoceras geslinianum5 sites
- Astarte4 sites
- Camptonectes4 sites
- Euomphaloceras septemseriatum4 sites
- Pseudocalycoceras angolaense4 sites
- Solemya4 sites
- Anisoceras3 sites
- Bivalvia3 sites
The Paleobiology Database records 28 sites for Worthoceras, 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
15 references- The paleoecology of the Cenomanian-Turonian (Cretaceous) stage boundary extinctions at Black Mesa, Arizona10
- Geology of the Tinui-Awatoitoi District4
- Paleontology of the Greenhorn cylcothem (Cretaceous: late Cenomanian to middle Turonian) at Black Mesa, northeastern Arizona3
- Tarrantoceras Stephenson and related ammonoid genera from Cenomanian (Upper Cretaceous) rocks in Texas and the western interior of the United States3
- Genus Worthoceras Adkins from Cretaceous Deposits of Tiruchchirapalli District, Tamil Nadu, India3
- Integrated stratigraphy and palaeoenvironment of the Cenomanian-Lower Turonian (Upper Cretaceous) of Northern Westphalia, North Germany2
- Kreide-Fossilien in Sachsen, Teil 1, 7. Ammoniten1
- The late Albian to Early Cenomanian succession at Mount Risou near Rosans (Drôme, SE France): an integrated study (ammonites, inoceramids, planktonic foraminifera, nannofossils, oxygen and carbon isotopes)1
- The Britton Notopocorystes Assemblage: An Eagle Ford Decapod Assemblage from the Cretaceous of North-Central Texas1
- Late Albian ammonites from the Northern Territory, Australia1
- Cenomanian micromorphic ammonites from the western interior of the USA1
- Upper Cretaceous rocks and ammonite faunas of southwestern New Mexico1
Each of the 34 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. 3 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 Worthoceras
- Source
- GBIF
- Credit
- Elder, William
- Licence
- CC BY-NC 4.0
- Commercial use
- the licence does not allow 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 was 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 itOtoscaphitinae through timeFormations of the Late CretaceousThe world it lived on
Occurrence data from the Paleobiology Database, CC BY 4.0. Adkins 1928