Ancyloceras

Ancyloceras is an extinct genus of heteromorph ammonites found throughout the world during the Lower Cretaceous, from the Lower Barremian epoch until the genus extinction during the Lower Aptian.

Ancyloceras

Ghedoghedo · CC BY-SA 3.0 · 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
AncyloceratinaePBDB
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 84 million years on record.

The record covers at least 168.2 Mya to 83.6 Mya. No occurrence read is dated outside 170.9 Mya to 72.2 Mya.

Middle Jurassic — about 1 of 54 occurrencesMiddle JurassicLate Jurassic — about 1 of 54 occurrencesLate JurassicEarly Cretaceous — about 48 of 54 occurrencesEarly CretaceousLate Cretaceous — about 4 of 54 occurrencesLate Cretaceous173–169 Mya — about 0.5 occurrences169–166 Mya — about 0.5 occurrences146–142 Mya — about 1 occurrence139–135 Mya — about 0.9 occurrences135–132 Mya — about 1 occurrence132–128 Mya — about 0.2 occurrences128–125 Mya — about 4 occurrences125–122 Mya — about 15 occurrences122–118 Mya — about 18 occurrences118–115 Mya — about 4 occurrences115–111 Mya — about 2 occurrences111–108 Mya — about 0.9 occurrences108–104 Mya — about 0.9 occurrences104–101 Mya — about 0.9 occurrences101–98 Mya — about 1 occurrence98–94 Mya — about 2 occurrences94–91 Mya — about 0.1 occurrences84–80 Mya — about 0.3 occurrences80–77 Mya — about 0.3 occurrences77–74 Mya — about 0.3 occurrences74–70 Mya — about 0.1 occurrences168.2 Mya83.6 Mya173 Mya70 Mya

54 occurrences of Ancyloceras on record, most of them in the Early 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

54 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

11 formations

Budden Canyon — 40.42°N, 122.66°WAtherfield Clay — 50.60°N, 1.32°WAtherfield Clay — 51.28°N, 0.53°EAtherfield Clay — 50.61°N, 1.36°WMount Goodenough — 67.95°N, 135.41°WAhlen — 51.75°N, 8.03°EMakatini — 27.17°S, 32.17°EMaiolica — 45.75°N, 9.48°EFerruginous Sands — 50.60°N, 1.35°WValle Grande — 10.25°N, 63.92°WPuez — 46.59°N, 11.79°EChia Gara — 37.01°N, 43.40°ESarcheshmah — 37.72°N, 56.32°E

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The named rock units Ancyloceras has been recovered from, largest first. Drawn where the rock is now, not where it formed. 33 occurrences have no formation on record, which is common for older literature.

Ancyloceras and its relatives

Early Cretaceous

Where Ancyloceras and its relatives were recorded in the Early Cretaceous.

Found in the same rock

404 taxa

The Paleobiology Database records 47 sites for Ancyloceras, 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

31 references

Each of the 54 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. 19 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 Ancyloceras

Credit
Ghedoghedo
Licence
CC BY-SA 3.0
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 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 itAncyloceratinae through timeFormations of the Early CretaceousThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. (d'Orbigny 1842)