Opertochasma

Opertochasma

via iDigBio · CC0 · 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
PholadidaePBDB
Diet
suspension feederPBDB, for Pholadidae
Life habit
boringPBDB, for Pholadidae
Motility
stationaryPBDB, for Pholadidae
Vision
blindPBDB, for Bivalvia

Time the record covers

At least 32 million years on record.

The record covers at least 93.9 Mya to 61.66 Mya. No occurrence read is dated outside 100.5 Mya to 59.24 Mya.

Early Cretaceous — about 0 of 37 occurrencesLate Cretaceous — about 36 of 37 occurrencesLate CretaceousPaleocene — about 1 of 37 occurrencesPaleocene101–100 Mya — about 0.6 occurrences100–98 Mya — about 2 occurrences98–97 Mya — about 2 occurrences97–96 Mya — about 2 occurrences96–94 Mya — about 2 occurrences94–93 Mya — about 0.3 occurrences84–83 Mya — about 0.2 occurrences83–81 Mya — about 0.3 occurrences81–80 Mya — about 0.3 occurrences80–78 Mya — about 0.3 occurrences78–77 Mya — about 0.3 occurrences77–76 Mya — about 0.3 occurrences76–74 Mya — about 0.3 occurrences74–73 Mya — about 0.3 occurrences73–71 Mya — about 4 occurrences71–70 Mya — about 6 occurrences70–68 Mya — about 6 occurrences68–67 Mya — about 6 occurrences67–66 Mya — about 4 occurrences63–61 Mya — about 0.2 occurrences61–60 Mya — about 0.6 occurrences60–58 Mya — about 0.3 occurrences93.9 Mya61.66 Mya101.3 Mya58.4 Mya

37 occurrences of Opertochasma on record, most of them in the Late 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

37 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

10 formations

Woodbine — 33.66°N, 96.45°WWoodbine — 32.86°N, 97.06°WWoodbine — 32.97°N, 96.94°WWoodbine — 33.71°N, 96.46°WWoodbine — 33.67°N, 96.34°WSevern — 38.80°N, 77.00°WSevern — 38.89°N, 76.85°WSevern — 38.92°N, 76.85°WPrairie Bluff — 32.04°N, 86.78°WPrairie Bluff — 31.95°N, 86.70°WPierre Shale — 43.30°N, 104.14°WPierre Shale — 40.06°N, 106.39°WCabrillo — 32.68°N, 117.24°WCabrillo — 32.81°N, 117.27°WChiwapa — 34.63°N, 88.94°WProvidence — 31.82°N, 85.00°WSandy Hook — 40.40°N, 74.12°WFox Hills — 45.14°N, 100.88°WSanta Susana — 34.24°N, 118.73°W

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The named rock units Opertochasma has been recovered from, largest first. Drawn where the rock is now, not where it formed. 12 occurrences have no formation on record, which is common for older literature.

Opertochasma and its relatives

Late Cretaceous

Where Opertochasma and its relatives were recorded in the Late Cretaceous.

Found in the same rock

694 taxa

The Paleobiology Database records 37 sites for Opertochasma, 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

10 references

Each of the 37 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 content1

Picture of Opertochasma

Source
iDigBio
Credit
via iDigBio
Licence
CC0
Commercial use
the licence allows it

No 3D scan of Opertochasma 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 itPholadidae through timeFormations of the Late CretaceousThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. Stephenson 1953