Trigonioidea
Uncredited · 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
- TrigoniidaPBDB
- Diet
- suspension feederPBDB, for Trigoniida
- Life habit
- infaunalPBDB, for Trigoniida
- Motility
- facultatively mobilePBDB, for Trigoniida
- Vision
- blindPBDB, for Bivalvia
Time the record covers
At least 465 million years on record.
The record covers at least 471.3 Mya to 5.333 Mya. No occurrence read is dated outside 477.1 Mya to 3.6 Mya.
3,816 occurrences of Trigonioidea on record, most of them in the Permian. The Paleobiology Database records this as a living group, and the chart stops with its fossils rather than at the present. 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
3,816 occurrences- Ordovicianunder 1%
- Silurianunder 1%
- Devonian4%
- Carboniferous6%
- Permian18%
- Early Triassic11%
- Middle Triassic14%
- Late Triassic14%
- Early Jurassic6%
- Middle Jurassic10%
- Late Jurassic3%
- Early Cretaceous8%
- Late Cretaceous5%
- Paleoceneunder 1%
- Oligoceneunder 1%
- Mioceneunder 1%
- Plioceneunder 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
711 formations
- Qingyan Formation112
- Werfen Formation · Costabella Group109
- Chari Formation54
- Park City Formation52
- Carmel Formation50
- Moenkopi Formation48
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The named rock units Trigonioidea has been recovered from, largest first. Drawn where the rock is now, not where it formed. 687 further formations hold fewer occurrences each and are not listed. 867 occurrences have no formation on record, which is common for older literature.
Trigonioidea and its relatives
PermianWhere Trigonioidea and its relatives were recorded in the Permian.
Found in the same rock
1,912 taxa- Schizodus72 sites
- Trigonia44 sites
- Eoschizodus42 sites
- Aviculopecten41 sites
- Crinoidea38 sites
- Panopea28 sites
- Composita26 sites
- Chonetes24 sites
- Bellerophontoidea23 sites
- Bryozoa23 sites
- Productella21 sites
- Astarte20 sites
- Meekospira20 sites
- Nucula20 sites
- Orbiculoidea20 sites
- Palaeoneilo constricta20 sites
- Permophorus20 sites
- Schizodus wheeleri20 sites
- Cardium19 sites
- Euphemites19 sites
- Leiorhynchus19 sites
- Polidevcia19 sites
- Schizophoria19 sites
- Cypricardella18 sites
The Paleobiology Database records at least 1,564 sites for Trigonioidea, 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
712 references- A systematic survey of the Mesozoic Bivalvia from Japan80
- Fossilvergesellschaftungen, Paläoökologie und paläosynökologische Entwicklung im Oberen Anisium (Mittlere Trias) von Qingyan, insbesondere Bangtoupo, Provinz Guizhou, Südwestchina74
- Stratigraphische und Paläogeographische Stellung der Khenjan-Serie und deren Pelecypoden (Trias, Afgahnistan)70
- Unpublished data from Kachchh67
- Parallel evolution in early trigonacean bivalves60
- Marine Jurassic Pelecypods From Central and Southern Utah53
- The lower Triassic sequences of the Dolomites (Italy) and transdanubian mid-mountains (Hungary) and their correlation50
- Recovery dynamics of benthic marine communities from the Lower Triassic Werfen Formation, northern Italy47
- Die Muschelfauna der Nayband-Formation (Obertrias, Nor - Rhät) des östlichen Zentraliran47
- Aberhan, 199343
- Permian and Eotriassic bivalves of the middle Rockies43
- Taxonomic and ecological variations of Permian-Triassic transitional bivalve communities from the littoral clastic facies in southwestern China39
Each of the 3,816 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. 700 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 Trigonioidea
- Source
- Wikidata/Commons
- Credit
- nobody named on the record
- Licence
- not stated by the source
- Commercial use
- cannot be read from the licence given — check the record
No 3D scan of Trigonioidea 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 itTrigoniida through timeFormations of the PermianThe world it lived on
Occurrence data from the Paleobiology Database, CC BY 4.0. Lamarck 1819