Posidoniidae

Joe Mabel · 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
- PosidonioideaPBDB
- Diet
- suspension feederPBDB, for Ostreida
- Life habit
- epifaunalPBDB, for Ostreida
- Motility
- stationaryPBDB
- Vision
- blindPBDB, for Bivalvia
- Environment
- marine,brackishPBDB, for Ostreida
Time the record covers
At least 323 million years on record.
The record covers at least 413.02 Mya to 89.8 Mya. No occurrence read is dated outside 419.62 Mya to 85.7 Mya.
989 occurrences of Posidoniidae on record, most of them in the Middle 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
989 occurrences- Devonian2%
- Carboniferous13%
- Permian2%
- Early Triassic14%
- Middle Triassic14%
- Late Triassic6%
- Early Jurassic16%
- Middle Jurassic28%
- Late Jurassic1%
- Early Cretaceousunder 1%
- Late Cretaceous4%
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
182 formations
- Opalinuston Formation125
- Chari Formation63
- Colsterdale Marine Beds Formation29
- Qingyan Formation29
- Whitby Mudstone Formation29
- Vikinghogda Formation · Sassendalen Group28
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The named rock units Posidoniidae has been recovered from, largest first. Drawn where the rock is now, not where it formed. 158 further formations hold fewer occurrences each and are not listed. 282 occurrences have no formation on record, which is common for older literature.
Posidoniidae and its relatives
Middle JurassicWhere Posidoniidae and its relatives were recorded in the Middle Jurassic.
Found in the same rock
992 taxa- Bositra buchi138 sites
- Planolites123 sites
- Parainoceramya dubia72 sites
- Posidonia57 sites
- Cingentolium (Cingentolium) cingulatum35 sites
- Nuculana32 sites
- Astarte29 sites
- Toarctocera subpunctata27 sites
- Palaeonucula hammeri23 sites
- Posidoniella22 sites
- Nautiloidea19 sites
- Tancredia18 sites
- Decapoda16 sites
- Anthracoceras15 sites
- Grammatodon15 sites
- Anthracoceras paucilobum14 sites
- Dimorphoceras14 sites
- Bivalvia13 sites
- Gastropoda12 sites
- Jurapseudes friedericianus12 sites
- Plagiostoma12 sites
- Chondrites11 sites
- Crinoidea11 sites
- Bositra10 sites
The Paleobiology Database records 792 sites for Posidoniidae, 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
225 references- Paläontologische Untersuchungen im unteren Opalinuston der Nordschweiz125
- Unpublished data from Kachchh68
- Early Jurassic Bivalvia of western Canada. Part I. Subclasses Palaeotaxodonta, Pteriomorpha, and Isofilibranchia62
- Marine bands of Arnsbergian age (Namurian) in the south-eastern portion of the Askrigg Block, Yorkshire43
- Materialen zu einer Monographie der Halobiidae und Monotidae der Trias [Monograph on the Halobiidae and Monotidae of the Triassic]28
- The Impact of Global Warming and Anoxia on Marine Benthic Community Dynamics: an Example from the Toarcian (Early Jurassic)27
- Magnolobia: a new bivalve genus from the boreal Ladinian22
- Dagis et al., 199618
- The Triassic stratigraphy of Svalbard18
- Middle Triassic (Anisian) diversified bivavles: depositional environments and bivalve assemblages in the Leidapo Member of the Qingyan Formation, southern China17
- The Prati di Stuores/Stuores Wiesen Section (Dolomites, Italy): a candidate Global Stratotype Section and Point for the base of the Carnian stage.17
- A biofacies analysis of the Gastrioceras cumbriense marine band (Namurian) of the central Pennines16
Each of the 989 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. 213 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 Posidoniidae
- Source
- Wikidata/Commons
- Credit
- Joe Mabel
- Licence
- CC BY-SA 3.0
- Commercial use
- the licence allows it
No 3D scan of Posidoniidae 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 itPosidonioidea through timeFormations of the Middle JurassicThe world it lived on
Occurrence data from the Paleobiology Database, CC BY 4.0. Frech 1909