Axonoceras

Axonoceras is a genus in the ammonitid family Nostoceratidae proposed by Stephenson in 1941, for "slender shells coiled in a plane with numerous closely spaced ribs and two rows of ventral nodes'...The shells may be closely coiled, though not involute, but most... are more or less loosely and irregularly coiled". Shells may be coplanar or coiled in a low flat spiral with the early whorls in contact, later whorls free.

No picture of Axonoceras 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 Axonoceras, 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 least 11 million years on record.

The record covers at least 83.6 Mya to 72.2 Mya. No occurrence read is dated outside 93.9 Mya to 66 Mya.

Late Cretaceous — about 12 of 12 occurrencesLate CretaceousPaleocene — about 0 of 12 occurrences94–93 Mya — about 0.0 occurrences93–93 Mya — about 0.1 occurrences93–92 Mya — about 0.1 occurrences92–91 Mya — about 0.1 occurrences91–90 Mya — about 0.1 occurrences90–89 Mya — about 0.1 occurrences89–88 Mya — about 0.1 occurrences88–87 Mya — about 0.1 occurrences87–86 Mya — about 0.1 occurrences86–85 Mya — about 0.1 occurrences85–84 Mya — about 0.1 occurrences84–83 Mya — about 0.2 occurrences83–82 Mya — about 0.3 occurrences82–81 Mya — about 0.3 occurrences81–80 Mya — about 0.3 occurrences80–79 Mya — about 0.3 occurrences79–78 Mya — about 0.3 occurrences78–77 Mya — about 0.3 occurrences77–76 Mya — about 0.3 occurrences76–75 Mya — about 0.3 occurrences75–74 Mya — about 0.3 occurrences74–73 Mya — about 0.3 occurrences73–72 Mya — about 0.3 occurrences72–71 Mya — about 1 occurrence71–70 Mya — about 1 occurrence70–69 Mya — about 1 occurrence69–68 Mya — about 1 occurrence68–67 Mya — about 1 occurrence67–66 Mya — about 1 occurrence66–65 Mya — about 0.5 occurrences83.6 Mya72.2 Mya94.5 Mya65.4 Mya

12 occurrences of Axonoceras 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

12 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

6 formations

Neylandville Marl — 33.37°N, 95.69°WNeylandville Marl — 32.10°N, 96.47°WMoreno — 37.76°N, 121.40°WMoreno — 37.56°N, 121.37°WTeba — 9.25°S, 14.10°ETeba — 13.00°S, 14.00°ENacatoch Sand — 32.10°N, 96.47°WNavesink — 40.41°N, 74.03°WPierre Shale — 40.06°N, 106.39°W

Loading coastlines…

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

Axonoceras and its relatives

Late Cretaceous

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

Found in the same rock

171 taxa

The Paleobiology Database records 9 sites for Axonoceras, 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 12 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 Axonoceras 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 Axonoceras, or no answer at all. This entry cannot say which.

No 3D scan of Axonoceras 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