Anaklinoceras

Anaklinoceras is a genus of extinct heteromorph ammonite cephalopod that lived in marine environments in what is now Western North America during the Campanian division of the Cretaceous period. Their shells were very similar to the related ammonites of the genus Ainoceras, where the young ammonite's shell coiled helically, and upon reaching adulthood, the youngest coil arched over the older coils.

No picture of Anaklinoceras was found. Wikipedia, Wikidata and iDigBio were searched and had none. Smithsonian Open Access did not answer, so this is what the others held rather than everything there is. GBIF was asked, and what came back is not recorded: nothing, or a picture this site could not tie to Anaklinoceras, or no answer at all. This entry cannot say which.

On record

Recorded, not inferred
Sits inside
NostoceratidaePBDB
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 18 million years on record.

Every occurrence read is dated to somewhere between 83.6 Mya and 66 Mya, and nothing in the dating separates them, so that window is what the record shows rather than a span.

Late Cretaceous — about 16 of 16 occurrencesLate CretaceousPaleocene — about 0 of 16 occurrences84–83 Mya — about 0.1 occurrences83–83 Mya — about 0.7 occurrences83–82 Mya — about 0.7 occurrences82–82 Mya — about 0.7 occurrences82–81 Mya — about 0.7 occurrences81–80 Mya — about 0.7 occurrences80–80 Mya — about 0.7 occurrences80–79 Mya — about 0.7 occurrences79–79 Mya — about 0.7 occurrences79–78 Mya — about 0.7 occurrences78–77 Mya — about 0.7 occurrences77–77 Mya — about 0.7 occurrences77–76 Mya — about 0.7 occurrences76–75 Mya — about 0.7 occurrences75–75 Mya — about 0.7 occurrences75–74 Mya — about 0.7 occurrences74–74 Mya — about 0.7 occurrences74–73 Mya — about 0.7 occurrences73–72 Mya — about 0.7 occurrences72–72 Mya — about 0.4 occurrences72–71 Mya — about 0.3 occurrences71–70 Mya — about 0.3 occurrences70–70 Mya — about 0.3 occurrences70–69 Mya — about 0.3 occurrences69–69 Mya — about 0.3 occurrences69–68 Mya — about 0.3 occurrences68–67 Mya — about 0.3 occurrences67–67 Mya — about 0.3 occurrences67–66 Mya — about 0.3 occurrences66–66 Mya — about 0.1 occurrences84.1 Mya65.5 Mya

16 occurrences of Anaklinoceras 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

16 occurrences

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

3 formations

Pierre Shale — 43.25°N, 104.27°WPierre Shale — 40.06°N, 106.39°WPierre Shale — 40.76°N, 105.05°WPierre Shale — 40.90°N, 105.06°WPierre Shale — 40.51°N, 105.07°WPierre Shale — 40.73°N, 105.04°WMount Laurel Sand — 39.55°N, 75.65°WMount Laurel Sand — 39.79°N, 75.63°WNeylandville Marl — 33.37°N, 95.69°WNeylandville Marl — 32.10°N, 96.47°W

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The named rock units Anaklinoceras has been recovered from, largest first. Drawn where the rock is now, not where it formed.

Anaklinoceras and its relatives

Late Cretaceous

Where Anaklinoceras and its relatives were recorded in the Late Cretaceous.

Found in the same rock

236 taxa

The Paleobiology Database records 15 sites for Anaklinoceras, 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

6 references

Each of the 16 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 content0

No picture of Anaklinoceras was found. Wikipedia, Wikidata and iDigBio were searched and had none.

Smithsonian Open Access did not answer, so this is what the others held rather than everything there is.

GBIF was asked, and what came back is not recorded: nothing, or a picture this site could not tie to Anaklinoceras, or no answer at all. This entry cannot say which.

No 3D scan of Anaklinoceras 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 itNostoceratidae through timeFormations of the Late CretaceousThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. Stephenson 1941