Trapezium

Trapezium

via iDigBio · 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
TrapezidaePBDB
Diet
suspension feederPBDB, for Venerida
Life habit
infaunalPBDB, for Venerida
Motility
facultatively mobilePBDB, for Venerida
Vision
blindPBDB, for Bivalvia

Time the record covers

At least 241 million years on record.

The record covers at least 241.464 Mya to 129 ka. No occurrence read is dated outside 250.8 Mya to 11.7 ka.

Permian — about 0 of 53 occurrencesEarly Triassic — about 0 of 53 occurrencesMiddle Triassic — about 1 of 53 occurrencesLate Triassic — about 0 of 53 occurrencesEarly Jurassic — about 2 of 53 occurrencesEarly JurassicMiddle Jurassic — about 0 of 53 occurrencesLate Jurassic — about 0 of 53 occurrencesEarly Cretaceous — about 4 of 53 occurrencesEarly CretaceousLate Cretaceous — about 6 of 53 occurrencesLate CretaceousPaleocene — about 1 of 53 occurrencesEocene — about 14 of 53 occurrencesEoceneOligocene — about 0 of 53 occurrencesMiocene — about 8 of 53 occurrencesPliocene — about 1 of 53 occurrencesPleistocene — about 16 of 53 occurrences256–247 Mya — about 0.4 occurrences247–239 Mya — about 0.6 occurrences205–196 Mya — about 2 occurrences145–136 Mya — about 2 occurrences128–119 Mya — about 0.2 occurrences119–111 Mya — about 0.8 occurrences111–102 Mya — about 1 occurrence85–77 Mya — about 0.6 occurrences77–68 Mya — about 4 occurrences68–60 Mya — about 2 occurrences60–51 Mya — about 1 occurrence51–43 Mya — about 7 occurrences43–34 Mya — about 6 occurrences34–26 Mya — about 0.1 occurrences26–17 Mya — about 6 occurrences17–8.5 Mya — about 2 occurrences8.5–0 Mya — about 17 occurrences241.464 Mya129 ka256 Mya0 Mya

53 occurrences of Trapezium on record, most of them in the Pleistocene. 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

53 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

17 formations

Kunugidaira — 36.83°N, 145.75°EKunugidaira — 37.00°N, 140.75°ETainohata — 34.75°N, 135.17°EMatilija — 34.48°N, 119.30°Wopoka — 51.32°N, 21.95°EWaimanalo — 21.35°N, 158.12°WWaimanalo — 21.45°N, 157.72°WCarbonera — 24.22°N, 102.82°WAldabra Limestone — 9.42°S, 46.45°Emarly chalk — 51.22°N, 21.43°EPolonez Cove — 62.25°S, 59.00°WKhuiala — 27.86°N, 72.93°EHangu — 33.53°N, 71.06°EFuranui — 42.52°N, 142.23°EAkasawa Silt — 34.67°N, 137.25°EToshima Sand — 34.62°N, 137.22°EGosport Sand — 31.54°N, 87.52°WArakida — 35.75°N, 137.92°EChico — 38.72°N, 121.21°W

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The named rock units Trapezium has been recovered from, largest first. Drawn where the rock is now, not where it formed. 16 occurrences have no formation on record, which is common for older literature.

Trapezium and its relatives

Pleistocene

Where Trapezium and its relatives were recorded in the Pleistocene.

Found in the same rock

794 taxa

The Paleobiology Database records 31 sites for Trapezium, 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

26 references

Each of the 53 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. 14 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 Trapezium

Source
iDigBio
Credit
via iDigBio
Licence
not stated by the source
Commercial use
cannot be read from the licence given — check the record

3D model

Source
Sketchfab
Licence
CC Attribution-NonCommercial
Commercial use
the licence does not allow it

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

Keep going

What may have been alongside itTrapezidae through timeFormations of the PleistoceneThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. Mühlfeld 1811