Quadratotrigonia

Quadratotrigonia

via iDigBio · CC BY-NC-SA · via iDigBio. 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
TrigoniidaePBDB
Diet
suspension feederPBDB, for Trigoniidae
Life habit
shallow infaunalPBDB, for Trigoniidae
Motility
fast-movingPBDB, for Trigoniidae
Vision
blindPBDB, for Trigoniidae
Environment
marinePBDB, for Trigoniidae

Time the record covers

At least 38 million years on record.

The record covers at least 132.6 Mya to 93.9 Mya. No occurrence read is dated outside 137.05 Mya to 89.8 Mya.

Early Cretaceous — about 18 of 19 occurrencesEarly CretaceousLate Cretaceous — about 1 of 19 occurrencesLate Cretaceous138–136 Mya — about 0.7 occurrences136–135 Mya — about 2 occurrences135–133 Mya — about 2 occurrences133–131 Mya — about 0.9 occurrences131–130 Mya — about 0.6 occurrences130–128 Mya — about 0.6 occurrences128–127 Mya — about 0.6 occurrences127–125 Mya — about 0.5 occurrences125–123 Mya — about 0.4 occurrences123–122 Mya — about 0.4 occurrences122–120 Mya — about 2 occurrences120–118 Mya — about 1 occurrence118–117 Mya — about 0.9 occurrences117–115 Mya — about 0.9 occurrences115–113 Mya — about 0.9 occurrences113–112 Mya — about 0.1 occurrences110–109 Mya — about 0.8 occurrences109–107 Mya — about 0.9 occurrences107–105 Mya — about 0.7 occurrences105–104 Mya — about 0.6 occurrences104–102 Mya — about 0.6 occurrences102–100 Mya — about 0.5 occurrences95–94 Mya — about 0.0 occurrences94–92 Mya — about 0.4 occurrences92–90 Mya — about 0.4 occurrences90–89 Mya — about 0.2 occurrences132.6 Mya93.9 Mya138 Mya88.9 Mya

19 occurrences of Quadratotrigonia on record, most of them in the Early Cretaceous. 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

19 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

Blackdown Greensand — 52.63°N, 1.13°WGrès verts helvétiques — 46.04°N, 6.62°EGrès verts helvétiques — 45.91°N, 6.49°EMural — 30.82°N, 111.89°WMural — 29.03°N, 111.63°WAtherfield Clay — 50.61°N, 1.36°WBudden Canyon — 40.50°N, 122.49°WPinos — 28.23°N, 115.24°W

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The named rock units Quadratotrigonia has been recovered from, largest first. Drawn where the rock is now, not where it formed. 8 occurrences have no formation on record, which is common for older literature.

Quadratotrigonia and its relatives

Early Cretaceous

Where Quadratotrigonia and its relatives were recorded in the Early Cretaceous.

Found in the same rock

342 taxa

The Paleobiology Database records 12 sites for Quadratotrigonia, 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

9 references

Each of the 19 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 content2

Picture of Quadratotrigonia

Source
iDigBio
Credit
via iDigBio
Licence
CC BY-NC-SA
Commercial use
the licence does not allow it

3D model

Source
Sketchfab
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.

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

Keep going

What may have been alongside itTrigoniidae through timeFormations of the Early CretaceousThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. Dietrich 1933