Amoeboceras

Amoeboceras is an extinct genus of ammonite cephalopod closely related to the genus Cardioceras. Fossils are found in Late Jurassic-aged marine strata of Europe and Russia.

Amoeboceras

Apokryltaros · CC BY-SA 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
PrionoceratidaePBDB
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 216 million years on record.

The record covers at least 365.2 Mya to 149.2 Mya. No occurrence read is dated outside 372.15 Mya to 143.1 Mya.

Devonian — about 26 of 162 occurrencesCarboniferous — about 2 of 162 occurrencesCarboniferousPermian — about 0 of 162 occurrencesEarly Triassic — about 0 of 162 occurrencesMiddle Triassic — about 0 of 162 occurrencesLate Triassic — about 0 of 162 occurrencesEarly Jurassic — about 0 of 162 occurrencesMiddle Jurassic — about 0 of 162 occurrencesLate Jurassic — about 134 of 162 occurrencesEarly Cretaceous — about 0 of 162 occurrences377–369 Mya — about 0.3 occurrences369–361 Mya — about 23 occurrences361–353 Mya — about 3 occurrences345–337 Mya — about 0.7 occurrences337–329 Mya — about 0.3 occurrences170–162 Mya — about 0.2 occurrences162–154 Mya — about 60 occurrences154–146 Mya — about 74 occurrences146–139 Mya — about 0.6 occurrences365.2 Mya149.2 Mya377 Mya139 Mya

162 occurrences of Amoeboceras on record, most of them in the Late Jurassic. 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

162 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

13 formations

Agardfjellet — 77.62°N, 15.01°EAgardfjellet — 78.10°N, 13.90°EAgardhfjellet — 78.10°N, 13.89°EAgardhfjellet — 78.08°N, 18.86°EJanusfjellet — 77.05°N, 16.23°EJanusfjellet — 78.06°N, 18.69°EKap Leslie — 70.48°N, 21.97°WKingak Shale — 69.53°N, 146.30°WMarnes de Latrecey — 47.98°N, 4.85°EUpper Calcareous Grit — 53.98°N, 1.53°WHongguleleng — 46.76°N, 86.14°EMariposa — 37.98°N, 120.56°WImpressamergel — 48.21°N, 8.81°EDietfurt — 49.95°N, 11.08°EWangyou — 25.77°N, 106.38°EHemberg — 51.37°N, 7.60°E

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The named rock units Amoeboceras has been recovered from, largest first. Drawn where the rock is now, not where it formed. 128 occurrences have no formation on record, which is common for older literature.

Amoeboceras and its relatives

Late Jurassic

Where Amoeboceras and its relatives were recorded in the Late Jurassic.

Found in the same rock

337 taxa

The Paleobiology Database records 91 sites for Amoeboceras, 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

30 references

Each of the 162 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. 18 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 Amoeboceras

Credit
Apokryltaros
Licence
CC BY-SA 4.0
Commercial use
the licence allows it

3D model

Source
Sketchfab
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.

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 itPrionoceratidae through timeFormations of the Late JurassicThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. Hyatt 1900