Holectypus

Holectypus is an extinct genus of sea urchin. It lived from the Jurassic to the Cretaceous. Fossils have been found all around the world.

Holectypus

via iDigBio · CC0 · via iDigBio. 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
HolectypidaePBDB
Diet
detritivorePBDB, for Holectypoida
Life habit
semi-infaunalPBDB, for Holectypoida
Motility
actively mobilePBDB, for Holectypoida
Vision
limitedPBDB, for Echinoidea
Environment
marinePBDB, for Echinodermata

Time the record covers

At least 74 million years on record.

The record covers at least 168.2 Mya to 93.9 Mya. No occurrence read is dated outside 201.4 Mya to 89.8 Mya.

Late Triassic — about 0 of 88 occurrencesEarly Jurassic — about 0 of 88 occurrencesEarly JurassicMiddle Jurassic — about 27 of 88 occurrencesMiddle JurassicLate Jurassic — about 17 of 88 occurrencesLate JurassicEarly Cretaceous — about 35 of 88 occurrencesEarly CretaceousLate Cretaceous — about 8 of 88 occurrencesLate Cretaceous204–200 Mya — about 0.0 occurrences200–196 Mya — about 0.1 occurrences196–192 Mya — about 0.1 occurrences192–188 Mya — about 0.1 occurrences188–184 Mya — about 0.1 occurrences184–180 Mya — about 0.1 occurrences180–177 Mya — about 0.1 occurrences177–173 Mya — about 0.1 occurrences173–169 Mya — about 4 occurrences169–165 Mya — about 14 occurrences165–161 Mya — about 9 occurrences161–157 Mya — about 2 occurrences157–153 Mya — about 5 occurrences153–149 Mya — about 8 occurrences149–146 Mya — about 2 occurrences146–142 Mya — about 0.6 occurrences142–138 Mya — about 0.6 occurrences138–134 Mya — about 5 occurrences134–130 Mya — about 7 occurrences130–126 Mya — about 8 occurrences126–122 Mya — about 3 occurrences122–119 Mya — about 2 occurrences119–115 Mya — about 2 occurrences115–111 Mya — about 3 occurrences111–107 Mya — about 2 occurrences107–103 Mya — about 2 occurrences103–99 Mya — about 2 occurrences99–95 Mya — about 3 occurrences95–91 Mya — about 3 occurrences91–88 Mya — about 1.0 occurrences168.2 Mya93.9 Mya204 Mya88 Mya

88 occurrences of Holectypus 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

88 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

23 formations

Dhruma — 24.23°N, 46.58°EDhruma — 24.89°N, 46.58°EDhruma — 23.30°N, 46.33°EDhruma — 22.62°N, 46.00°EDhruma — 22.53°N, 46.17°EDhruma — 25.33°N, 45.50°EDhruma — 22.17°N, 45.83°EDhruma — 24.75°N, 46.00°EDhruma — 25.17°N, 45.50°EDhruma — 25.53°N, 45.00°EDhruma — 25.78°N, 45.25°EDhruma — 25.05°N, 45.67°EDhruma — 24.75°N, 46.08°EAurora Limestone — 26.42°N, 103.25°WMt. Lysa — 52.42°N, 21.85°EMt. Lysa — 50.90°N, 21.67°EMt. Lysa — 50.92°N, 20.95°EMauddud — 25.90°N, 56.07°EVuache — 46.83°N, 6.52°EShuqra — 14.27°N, 48.57°EQishn — 14.27°N, 48.57°ERaha — 29.13°N, 33.28°EAbu Qada — 29.13°N, 33.28°EWata — 29.13°N, 33.28°ECoralline Oolite — 54.21°N, 0.29°WLower Calcareous Grit — 54.21°N, 0.29°WBaghamshah — 32.00°N, 57.00°ELes Marno-Calcaires Supérieurs — 35.68°N, 0.92°WHuni Dolomite — 32.23°N, 35.77°EArgiles de Lamoriciere — 34.90°N, 1.03°Wcalcaires récifaux inférieurs — 38.73°N, 9.42°WRio Hatillo — 19.17°N, 70.67°WCotinguiba — 10.76°S, 37.07°WLiegende Bankkalk — 48.12°N, 8.87°EBahamite sequence — 53.77°N, 14.08°EMalone — 31.23°N, 105.55°WMiraflores — 18.89°S, 66.58°W

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The named rock units Holectypus has been recovered from, largest first. Drawn where the rock is now, not where it formed. 38 occurrences have no formation on record, which is common for older literature.

Holectypus and its relatives

Early Cretaceous

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

Found in the same rock

649 taxa

The Paleobiology Database records 80 sites for Holectypus, 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

27 references

Each of the 88 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. 15 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 Holectypus

Source
iDigBio
Credit
via iDigBio
Licence
CC0
Commercial use
the licence allows it

3D model

Source
Sketchfab
Licence
CC Attribution-NonCommercial-ShareAlike
Commercial use
the licence does not allow it

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 itHolectypidae through timeFormations of the Early CretaceousThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0.