Cidaridea

Didier Descouens · CC BY-SA 3.0 · via Wikidata/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
- CidaroidaPBDB
- Diet
- grazer, omnivorePBDB, for Cidaroida
- Life habit
- low-level epifaunalPBDB, for Cidaroida
- Motility
- slow-movingPBDB, for Cidaroida
- Vision
- limitedPBDB, for Echinoidea
- Environment
- marinePBDB, for Cidaroida
Time the record covers
At least 245 million years on record.
The record covers at least 245.19 Mya to 11.7 ka. No occurrence read is dated outside 251.902 Mya to 0 Mya.
908 occurrences of Cidaridea on record, most of them in the Late Cretaceous. The Paleobiology Database records this as a living group. 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
908 occurrences- Early Triassicunder 1%
- Middle Triassic8%
- Late Triassic12%
- Early Jurassic2%
- Middle Jurassic4%
- Late Jurassic9%
- Early Cretaceous13%
- Late Cretaceous20%
- Paleocene5%
- Eocene9%
- Oligocene2%
- Miocene12%
- Pliocene2%
- Pleistocene2%
- Holoceneunder 1%
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
206 formations
- Cassian Formation · Wegen Group55
- Qingyan Formation37
- Maastricht Formation24
- Pantano Formation17
- Denton Formation · Washita Group14
- Futuna Limestone Formation14
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The named rock units Cidaridea has been recovered from, largest first. Drawn where the rock is now, not where it formed. 182 further formations hold fewer occurrences each and are not listed. 302 occurrences have no formation on record, which is common for older literature.
Cidaridea and its relatives
Late CretaceousWhere Cidaridea and its relatives were recorded in the Late Cretaceous.
Found in the same rock
2,732 taxa- Cidaris90 sites
- Ostrea33 sites
- Bryozoa27 sites
- Temnocidaris (Stereocidaris)27 sites
- Cidaris pratti26 sites
- Echinogalerus26 sites
- Plagiostoma26 sites
- Chlamys24 sites
- Cidaridae24 sites
- Hemiaster24 sites
- Pecten21 sites
- Rhynchonella21 sites
- Tetragramma variolare21 sites
- Gastropoda20 sites
- Pleurotomaria20 sites
- Serpula20 sites
- Porifera19 sites
- Bivalvia18 sites
- Catopygus18 sites
- Goniopygus18 sites
- Nerinea18 sites
- Lithophaga17 sites
- Turritella17 sites
- Arca16 sites
The Paleobiology Database records 642 sites for Cidaridea, 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
263 references- Fossilvergesellschaftungen, Paläoökologie und paläosynökologische Entwicklung im Oberen Anisium (Mittlere Trias) von Qingyan, insbesondere Bangtoupo, Provinz Guizhou, Südwestchina37
- Primary collection data of Cassian Formation used for publication of Fürsich and Wendt (1977) (ref. 9188)29
- Recherches géologiques sur le Crétacé inférieur de l'Estremadura (Portugal)24
- I cidaroidi (Echinoidea) del Miocene inferiore-medio dell'Emilia-Romagna e di San Marino23
- Late Cretaceous-Early Paleocene echinoderms and the K/T boundary in the southeast Netherlands and the northeast Belgium. - part 4: Echinoids22
- Jura Vaudois et Neuchatelois21
- Unpublished data18
- Geology of Lau, Fiji17
- The Mesozoic and Cenozoic Echinodermata of the United States16
- Palökologie benthischer Faunen aus dem Unter-Toarc SW-Europas15
- Paléoécologie et paléobiogéographie des faunes d'échinides du Cénomanien nord-aquitain (Charente-Maritime, France)15
- Echinides du Crétacé inférieur de la Hongrie15
Each of the 908 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. 251 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 Cidaridea
- Source
- Wikidata/Commons
- Credit
- Didier Descouens
- Licence
- CC BY-SA 3.0
- Commercial use
- the licence allows it
No 3D scan of Cidaridea 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.
This is what the site found, which is not the same as what exists.
Keep going
What may have been alongside itCidaroida through timeFormations of the Late CretaceousThe world it lived on
Occurrence data from the Paleobiology Database, CC BY 4.0. Gray 1825