Ostreoidea
Ostreoidea is a taxonomic superfamily of bivalve marine mollusc, sometimes simply identified as oysters, containing two families. The ostreoids are characterized in part by the presence of a well developed axial rod. Anal flaps are known to exist within the family Ostreidae but not within the more-primitive Gryphaeidae. The scar from the adductor muscle is simple, with a single, central scar. In the majority, the right valve is less convex than the left.

No machine-readable author provided. BetacommandBot assumed (based on copyright claims). · 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
- OstreidaPBDB
- Diet
- suspension feederPBDB, for Ostreida
- Life habit
- epifaunalPBDB, for Ostreida
- Motility
- stationary, attachedPBDB, for Ostreida
- Vision
- blindPBDB, for Bivalvia
- Environment
- marine,brackishPBDB, for Ostreida
Time the record covers
At least 274 million years on record.
The record covers at least 274.4 Mya to 11.7 ka. No occurrence read is dated outside 283.3 Mya to 0 Mya.
12,000+ occurrences of Ostreoidea on record. 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
12,000 occurrences read- Permianunder 1%
- Early Triassicunder 1%
- Middle Triassicunder 1%
- Late Triassic2%
- Early Jurassic7%
- Middle Jurassic10%
- Late Jurassic10%
- Early Cretaceous8%
- Late Cretaceous30%
- Paleocene4%
- Eocene9%
- Oligocene3%
- Miocene9%
- Pliocene4%
- Pleistocene3%
- 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. The read hit its cap, so every figure above is a floor and the shares are of the occurrences read. More on what this infers.
Found in
at least 1180 formations
- Prairie Bluff Formation · Selma Group366
- Corsicana Marl Formation277
- Dhruma Formation · Shaqra Group250
- Chari Formation209
- Escondido Formation146
- Mancos Shale Formation137
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The named rock units Ostreoidea has been recovered from, largest first. Drawn where the rock is now, not where it formed. The read hit its cap, so each count is a floor. 1,156 further formations hold fewer occurrences each and are not listed. 2,848 occurrences have no formation on record, which is common for older literature.
Found in the same rock
1,274 taxa- Nuculana57 sites
- Pycnodonte vesicularis54 sites
- Cyprimeria40 sites
- Nucula40 sites
- Inoceramus39 sites
- Modiolus39 sites
- Spondylus36 sites
- Granocardium35 sites
- Lyriochlamys35 sites
- Panopea35 sites
- Dhondtichlamys34 sites
- Botula32 sites
- Camptonectes32 sites
- Aphrodina31 sites
- Syncyclonema31 sites
- Entolium orbiculare30 sites
- Exogyra30 sites
- Ambigostrea29 sites
- Cymbophora29 sites
- Pholadomya29 sites
- Pseudolimea29 sites
- Isognomon27 sites
- Liostrea27 sites
- Astarte26 sites
The Paleobiology Database records at least 833 sites for Ostreoidea, and this reads 240 of them. Of that, one read hit the database's own return limit, so every count below is a floor rather than a total. 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
at least 1,267 references- Unpublished data529
- Unpublished data on Cretaceous-Paleocene molluscan assemblages467
- Upper Cretaceous (Maestrichtian) Mollusca from the Haustator bilira Assemblage Zone in the East Gulf Coastal Plain431
- Upper Cretaceous (Maestrichtian) larger invertebrate Fossils from the Haustator bilira Assemblage Zone in the west gulf Coastal Plain375
- Le Jurassique D`Arabie Centrale297
- Palokologie und zeitliche Verbreitung benthischer Faunengemeinschaften im Unterjura von Chile249
- Unpublished data from Kachchh239
- Upper Cretaceous (Maestrichtian) larger invertebrates from the Haustator bilira Assemblage Zone in the Atlantic Coastal Plain with further data for the East Gulf204
- The paleoecology of the Cenomanian-Turonian (Cretaceous) stage boundary extinctions at Black Mesa, Arizona173
- Stratigraphic Distribution of Paleocene and Eocene Fossils in the Eastern Gulf Coast Region173
- Catalogue of the Paleocene and Eocene mollusca of the southern and eastern United States. Part 1. Pelecypoda, Amphineura, Pteropoda, Scaphopoda and Cephalopoda146
- Molluscs at the K/Pg boundary in Argentina: Extinction and recovery patterns. unpublished Ph.D. thesis144
Each of the 12,000 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. That read hit its cap, so each count is a floor. 1,255 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 Ostreoidea
- Source
- Wikipedia/Commons
- Credit
- No machine-readable author provided. BetacommandBot assumed (based on copyright claims).
- Licence
- CC BY-SA 3.0
- Commercial use
- the licence allows it
3D model
- Source
- Sketchfab
- Credit
- Stanislav Dobrovolsky
- Licence
- CC Attribution
- Commercial use
- cannot be read from the licence given — check the record
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
- Source
- Wikipedia, “Ostreoidea”
- 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 itOstreida through timeThe world it lived on
Occurrence data from the Paleobiology Database, CC BY 4.0. Rafinesque 1815