Hildoceratoidea

Hildoceratoidea, formerly Hildoceratacaea, is a superfamily of compressed or planulate ammonites, some tending to develop acute outer rims; generally with arcuate or sigmoidal ribs. Aptichus were found in place are double-valved.

Hildoceratoidea

Sailko · CC BY 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
AmmonitinaPBDB
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 66 million years on record.

The record covers at least 199.5 Mya to 132.6 Mya. No occurrence read is dated outside 201.4 Mya to 125.77 Mya.

Late Triassic — about 0 of 7237 occurrencesEarly Jurassic — about 6185 of 7237 occurrencesEarly JurassicMiddle Jurassic — about 1047 of 7237 occurrencesMiddle JurassicLate Jurassic — about 4 of 7237 occurrencesLate JurassicEarly Cretaceous — about 1 of 7237 occurrencesEarly Cretaceous203–200 Mya — about 4 occurrences200–198 Mya — about 11 occurrences198–195 Mya — about 11 occurrences195–192 Mya — about 89 occurrences192–190 Mya — about 441 occurrences190–187 Mya — about 441 occurrences187–185 Mya — about 470 occurrences185–182 Mya — about 1658 occurrences182–179 Mya — about 1088 occurrences179–177 Mya — about 1120 occurrences177–174 Mya — about 973 occurrences174–171 Mya — about 506 occurrences171–169 Mya — about 363 occurrences169–166 Mya — about 53 occurrences166–164 Mya — about 3 occurrences164–161 Mya — about 2 occurrences161–158 Mya — about 0.1 occurrences158–156 Mya — about 0.1 occurrences156–153 Mya — about 1 occurrence153–150 Mya — about 0.8 occurrences150–148 Mya — about 0.1 occurrences148–145 Mya — about 0.1 occurrences145–143 Mya — about 1 occurrence135–132 Mya — about 0.1 occurrences132–130 Mya — about 0.4 occurrences130–127 Mya — about 0.4 occurrences127–124 Mya — about 0.2 occurrences199.5 Mya132.6 Mya203 Mya124 Mya

7,237 occurrences of Hildoceratoidea on record, most of them in the Early Jurassic. The Paleobiology Database records this as a living group, and the chart stops with its fossils rather than at the present. 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

7,237 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

125 formations

Subbetic Basin — 37.70°N, 3.63°WSubbetic Basin — 37.38°N, 3.71°WSubbetic Basin — 37.59°N, 3.21°WSubbetic Basin — 38.06°N, 3.26°WSubbetic Basin — 38.13°N, 1.47°WJurensismergel — 49.91°N, 11.46°EJurensismergel — 47.95°N, 7.82°EJurensismergel — 48.83°N, 10.10°EWhiteaves — 53.42°N, 132.27°WWhiteaves — 53.20°N, 132.05°WWhiteaves — 53.19°N, 132.02°WWhiteaves — 52.96°N, 131.61°WWhiteaves — 53.49°N, 132.33°WBugarone — 43.33°N, 13.22°EBugarone — 43.51°N, 12.64°EKisgerecse — 47.70°N, 18.43°EKisgerecse — 47.70°N, 18.47°ENishinakayama — 34.25°N, 131.00°EAgoudim — 32.24°N, 4.26°WAgoudim — 31.98°N, 5.01°WFannin — 53.03°N, 131.88°WFannin — 53.18°N, 132.02°WFannin — 53.38°N, 132.27°WFannin — 53.41°N, 132.25°WFannin — 53.20°N, 132.05°WSpatsizi — 57.49°N, 128.89°WSpatsizi — 57.58°N, 128.93°WSpatsizi — 57.87°N, 129.57°WSpatsizi — 57.62°N, 128.97°WInklin — 59.34°N, 133.63°WInklin — 59.34°N, 133.73°WInklin — 59.25°N, 133.85°WInklin — 59.25°N, 133.86°WInklin — 59.26°N, 133.95°WInklin — 59.35°N, 133.83°WInklin — 59.42°N, 134.00°WAchdorf — 48.18°N, 8.76°EAchdorf — 48.13°N, 8.70°EMarnes de Fontaneilles — 43.85°N, 3.12°ESunrise — 38.49°N, 118.08°WSunrise — 39.33°N, 118.07°WIsztimér — 47.19°N, 17.90°EIsztimér — 47.28°N, 17.84°EKisgerecse Marl — 47.70°N, 18.49°ECamino — 43.05°N, 4.07°WCastillo Pedroso — 43.02°N, 4.17°WCastillo Pedroso — 43.15°N, 4.37°WTölgyhát — 47.70°N, 18.47°ETölgyhát — 47.28°N, 18.10°EJet Rock — 54.55°N, 0.77°WJet Rock — 54.53°N, 0.71°WJet Rock — 54.46°N, 0.54°WJet Rock — 54.48°N, 0.58°WJet Rock — 54.40°N, 0.49°WOpalinuston — 47.95°N, 7.82°EOpalinuston — 48.51°N, 9.21°ELautaro — 29.01°S, 70.20°WLautaro — 29.21°S, 70.28°WLautaro — 29.41°S, 70.40°WLautaro — 29.36°S, 70.19°WLautaro — 29.43°S, 70.13°WLautaro — 27.66°S, 69.97°WLautaro — 28.20°S, 70.00°WLautaro — 28.14°S, 69.97°WLautaro — 28.21°S, 69.94°WLautaro — 28.25°S, 69.93°WLautaro — 28.15°S, 69.79°WLautaro — 28.02°S, 69.72°WLautaro — 27.70°S, 69.61°WLautaro — 27.89°S, 69.84°WLautaro — 27.90°S, 69.98°WLautaro — 27.91°S, 69.92°WLautaro — 28.82°S, 70.28°WLautaro — 28.57°S, 70.10°WPhantom Creek — 53.38°N, 132.26°WOzirovo — 42.75°N, 24.75°EOzirovo — 42.92°N, 23.27°EOzirovo — 41.89°N, 24.58°EOzirovo — 42.86°N, 26.42°EOzirovo — 42.94°N, 24.41°EOzirovo — 43.22°N, 23.39°EOzirovo — 42.85°N, 23.26°EOzirovo — 42.89°N, 24.28°EOzirovo — 43.08°N, 23.23°EOzirovo — 41.52°N, 24.67°EOzirovo — 43.03°N, 23.25°EOzirovo — 43.11°N, 23.30°EAlum Shale — 54.49°N, 0.60°WAlum Shale — 54.40°N, 0.47°W

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The named rock units Hildoceratoidea has been recovered from, largest first. Drawn where the rock is now, not where it formed. 101 further formations hold fewer occurrences each and are not listed. 2,774 occurrences have no formation on record, which is common for older literature.

Hildoceratoidea and its relatives

Early Jurassic

Where Hildoceratoidea and its relatives were recorded in the Early Jurassic.

Found in the same rock

468 taxa

The Paleobiology Database records at least 878 sites for Hildoceratoidea, 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

196 references

Each of the 7,237 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. 184 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 Hildoceratoidea

Credit
Sailko
Licence
CC BY 3.0
Commercial use
the licence allows it

No 3D scan of Hildoceratoidea was found in Sketchfab.

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 itAmmonitina through timeFormations of the Early JurassicThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. Hyatt 1867