Pseudotrapezium

Pseudotrapezium

via iDigBio · CC BY-NC-ND · 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
ArcticidaePBDB
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 78 million years on record.

The record covers at least 199.5 Mya to 121.4 Mya. No occurrence read is dated outside 201.4 Mya to 113.2 Mya.

Late Triassic — about 0 of 78 occurrencesEarly Jurassic — about 37 of 78 occurrencesEarly JurassicMiddle Jurassic — about 27 of 78 occurrencesMiddle JurassicLate Jurassic — about 10 of 78 occurrencesLate JurassicEarly Cretaceous — about 4 of 78 occurrencesEarly Cretaceous203–200 Mya — about 0.7 occurrences200–197 Mya — about 2 occurrences197–194 Mya — about 2 occurrences194–191 Mya — about 7 occurrences191–188 Mya — about 10 occurrences188–185 Mya — about 10 occurrences185–182 Mya — about 6 occurrences176–173 Mya — about 0.9 occurrences173–170 Mya — about 0.9 occurrences170–166 Mya — about 6 occurrences166–163 Mya — about 12 occurrences163–160 Mya — about 8 occurrences160–157 Mya — about 3 occurrences157–154 Mya — about 3 occurrences151–148 Mya — about 0.5 occurrences148–145 Mya — about 2 occurrences145–142 Mya — about 2 occurrences142–139 Mya — about 2 occurrences139–136 Mya — about 0.9 occurrences124–121 Mya — about 0.1 occurrences121–118 Mya — about 0.4 occurrences118–114 Mya — about 0.4 occurrences114–111 Mya — about 0.2 occurrences199.5 Mya121.4 Mya203 Mya111 Mya

78 occurrences of Pseudotrapezium on record, most of them in the Early 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

78 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

24 formations

White Limestone — 51.75°N, 1.17°WDhruma — 23.97°N, 46.17°EDhruma — 23.97°N, 46.00°EDhruma — 22.83°N, 46.83°EDhruma — 21.88°N, 45.83°EBarahona Limestone — 40.67°N, 1.20°WShuqra — 14.27°N, 48.57°EShuqra — 14.32°N, 48.45°EAberhan Sinemur — 33.47°S, 70.75°WAberhan Pliensbach — 33.47°S, 70.75°WCape Stewart — 70.47°N, 22.36°WCape Stewart — 70.46°N, 22.33°WOolite — 14.44°S, 48.02°ECape Stewart Beds — 70.46°N, 22.71°WMadbi — 14.27°N, 48.57°ETuwaiq Mountain Limestone — 25.75°N, 45.17°EForest Marble — 51.00°N, 1.00°WBaghamshah — 32.00°N, 57.00°ERat River — 68.07°N, 135.58°WGoradongar — 23.50°N, 70.50°EGadhada — 23.50°N, 70.50°EBihen Limestone — 10.15°N, 45.10°EAgardhfjellet — 78.33°N, 15.80°EClypeus Grit — 51.80°N, 1.88°WGryphite Grits — 51.80°N, 1.88°WDogger — 54.42°N, 0.86°WIfenthal — 47.40°N, 7.42°EWagad Sandstone — 23.49°N, 70.49°EKhadir — 23.92°N, 70.39°E

Loading coastlines…

The named rock units Pseudotrapezium has been recovered from, largest first. Drawn where the rock is now, not where it formed. 26 occurrences have no formation on record, which is common for older literature.

Pseudotrapezium and its relatives

Early Jurassic

Where Pseudotrapezium and its relatives were recorded in the Early Jurassic.

Found in the same rock

610 taxa

The Paleobiology Database records 64 sites for Pseudotrapezium, 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

22 references

Each of the 78 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. 10 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 Pseudotrapezium

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

No 3D scan of Pseudotrapezium 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 itArcticidae through timeFormations of the Early JurassicThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. Fischer 1887