Gymnocidaris

Gymnocidaris

via GBIF · CC BY 4.0 · via GBIF. 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
HemicidaridaePBDB
Diet
grazer, deposit feederPBDB, for Echinoidea
Life habit
epifaunalPBDB, for Echinoidea
Motility
actively mobilePBDB, for Echinoidea
Vision
limitedPBDB, for Echinoidea
Environment
marinePBDB, for Echinodermata

Time the record covers

At least 15 million years on record.

The record covers at least 168.2 Mya to 152.21 Mya. No occurrence read is dated outside 170.9 Mya to 149.2 Mya.

Middle Jurassic — about 4 of 12 occurrencesMiddle JurassicLate Jurassic — about 8 of 12 occurrencesLate Jurassic171–171 Mya — about 0.1 occurrences171–170 Mya — about 0.4 occurrences170–169 Mya — about 0.4 occurrences169–168 Mya — about 0.5 occurrences168–168 Mya — about 0.6 occurrences168–167 Mya — about 0.6 occurrences167–166 Mya — about 0.6 occurrences166–165 Mya — about 0.6 occurrences165–165 Mya — about 0.0 occurrences159–159 Mya — about 0.4 occurrences159–158 Mya — about 0.6 occurrences156–155 Mya — about 0.0 occurrences155–154 Mya — about 0.7 occurrences154–153 Mya — about 0.7 occurrences153–152 Mya — about 0.7 occurrences152–152 Mya — about 1.0 occurrences152–151 Mya — about 1 occurrence151–150 Mya — about 1 occurrence150–149 Mya — about 1 occurrence149–149 Mya — about 0.4 occurrences168.2 Mya152.21 Mya171.4 Mya148.7 Mya

12 occurrences of Gymnocidaris 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

12 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

6 formations

Agoudim — 32.28°N, 4.42°WAgoudim — 32.27°N, 4.51°WMt. Lysa — 50.90°N, 21.67°ECaillasses de la Basse Ecarde — 49.00°N, 0.00°ETazigzaout — 32.25°N, 4.30°WLiegende Bankkalk — 48.12°N, 8.87°EMassenkalk — 48.89°N, 11.94°E

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The named rock units Gymnocidaris has been recovered from, largest first. Drawn where the rock is now, not where it formed. 4 occurrences have no formation on record, which is common for older literature.

Gymnocidaris and its relatives

Late Jurassic

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

Found in the same rock

294 taxa

The Paleobiology Database records 10 sites for Gymnocidaris, 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

7 references

Each of the 12 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. 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 Gymnocidaris

Source
GBIF
Credit
via GBIF
Licence
CC BY 4.0
Commercial use
the licence allows it

No 3D scan was found. Smithsonian Open Access, MorphoSource and Sketchfab were all searched.

This is what the site found, which is not the same as what exists.

Keep going

What may have been alongside itHemicidaridae through timeFormations of the Late JurassicThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. Agassiz 1838