Ancyloceratidae

Ancyloceratidae is a family of heteromorphic ammonites that lived during the Early Cretaceous. Their shells begin as a loose spiral with whorls not touching which then turns into a straight shaft that ends in a J-shape hook or bend at end. Coarse ribbing and spines are common.

Ancyloceratidae

Hectonichus · 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
AncyloceratoideaPBDB
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 414 occurrencesMiddle JurassicLate Jurassic — about 1 of 414 occurrencesLate JurassicEarly Cretaceous — about 408 of 414 occurrencesEarly CretaceousLate Cretaceous — about 4 of 414 occurrencesLate Cretaceous173–169 Mya — about 0.5 occurrences169–166 Mya — about 0.5 occurrences146–142 Mya — about 1 occurrence142–139 Mya — about 0.2 occurrences139–135 Mya — about 2 occurrences135–132 Mya — about 6 occurrences132–128 Mya — about 16 occurrences128–125 Mya — about 34 occurrences125–122 Mya — about 91 occurrences122–118 Mya — about 141 occurrences118–115 Mya — about 73 occurrences115–111 Mya — about 35 occurrences111–108 Mya — about 3 occurrences108–104 Mya — about 3 occurrences104–101 Mya — about 4 occurrences101–98 Mya — about 2 occurrences98–94 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

414 occurrences of Ancyloceratidae 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

414 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

51 formations

Ferruginous Sands — 50.60°N, 1.32°WFerruginous Sands — 50.63°N, 1.17°WFerruginous Sands — 50.60°N, 1.35°WHythe — 51.08°N, 1.18°EHythe — 51.08°N, 1.08°EHythe — 51.15°N, 0.88°EHythe — 51.28°N, 0.53°EHythe — 51.25°N, 0.07°WHythe — 51.23°N, 0.07°WLes Graous — 43.85°N, 7.11°ELes Graous — 43.85°N, 7.10°EWallumbilla — 16.52°S, 143.70°EWallumbilla — 20.85°S, 144.20°EWallumbilla — 25.00°S, 153.00°EWallumbilla — 16.08°S, 142.72°EWallumbilla — 17.60°S, 140.60°EWallumbilla — 27.83°S, 148.62°EWallumbilla — 20.75°S, 143.52°EWallumbilla — 26.58°S, 148.78°EBudden Canyon — 40.45°N, 122.58°WBudden Canyon — 40.42°N, 122.66°WBudden Canyon — 40.43°N, 122.65°WMakatini — 27.17°S, 32.17°EMakatini — 27.53°S, 32.17°ERio Mayer — 49.00°S, 72.00°WRio Mayer — 48.92°S, 72.08°WRio Mayer — 48.92°S, 71.92°WRio Mayer — 48.28°S, 72.00°WRio Mayer — 48.38°S, 71.80°WTaboulouart — 30.87°N, 9.81°WTaboulouart — 30.72°N, 9.80°WTaboulouart — 30.61°N, 9.73°WLa Peña — 29.61°N, 104.93°WLa Peña — 25.43°N, 100.12°WLa Peña — 25.62°N, 100.46°WForcall — 40.54°N, 0.18°ETotoralillo — 27.80°S, 70.36°WTotoralillo — 28.35°S, 70.59°WTotoralillo — 28.05°S, 70.46°WTotoralillo — 28.88°S, 70.74°WTotoralillo — 28.96°S, 70.73°WTotoralillo — 28.82°S, 70.72°WSandgate — 51.23°N, 0.22°WSandgate — 51.23°N, 0.58°WSandgate — 50.98°N, 0.75°WSandgate — 51.22°N, 0.12°WMaiolica — 43.59°N, 12.54°EMaiolica — 45.75°N, 9.48°EMaiolica — 43.53°N, 12.62°EAtherfield Clay — 50.60°N, 1.32°WAtherfield Clay — 51.28°N, 0.53°EAtherfield Clay — 50.61°N, 1.36°WFossil Bluff — 79.82°S, 55.00°WFossil Bluff — 72.15°S, 69.08°WPluto Glacier — 71.56°S, 68.22°WPluto Glacier — 71.75°S, 68.50°WSanganeh — 37.72°N, 56.32°ESanganeh — 37.72°N, 56.12°ESanganeh — 37.78°N, 56.33°EEl Mergueb — 36.84°N, 9.62°ESarcheshmah — 37.72°N, 56.32°ESarcheshmah — 37.72°N, 56.12°ESarcheshmeh — 37.77°N, 56.93°ETadhart — 31.21°N, 7.88°WSubway — 52.00°N, 10.00°EMount Goodenough — 67.95°N, 135.41°WSan Lucas — 18.53°N, 100.77°W

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The named rock units Ancyloceratidae has been recovered from, largest first. Drawn where the rock is now, not where it formed. 27 further formations hold fewer occurrences each and are not listed. 167 occurrences have no formation on record, which is common for older literature.

Ancyloceratidae and its relatives

Early Cretaceous

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

Found in the same rock

803 taxa

The Paleobiology Database records 297 sites for Ancyloceratidae, and this reads 240 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

90 references

Each of the 414 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. 78 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 content1

Picture of Ancyloceratidae

Credit
Hectonichus
Licence
CC BY-SA 3.0
Commercial use
the licence allows it

No 3D scan of Ancyloceratidae 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 itAncyloceratoidea through timeFormations of the Early CretaceousThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. Gill 1871