Cyclorisma

Cyclorisma

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
TapetiniPBDB
Diet
suspension feederPBDB, for Veneridae
Life habit
infaunalPBDB, for Veneridae
Motility
facultatively mobilePBDB, for Veneridae
Vision
blindPBDB, for Bivalvia

Time the record covers

At least 64 million years on record.

The record covers at least 137.05 Mya to 72.2 Mya. No occurrence read is dated outside 143.1 Mya to 66 Mya.

Late Jurassic — about 0 of 136 occurrencesEarly Cretaceous — about 4 of 136 occurrencesEarly CretaceousLate Cretaceous — about 132 of 136 occurrencesLate CretaceousPaleocene — about 0 of 136 occurrences145–142 Mya — about 0.2 occurrences142–139 Mya — about 0.4 occurrences139–137 Mya — about 0.4 occurrences115–113 Mya — about 0.3 occurrences113–110 Mya — about 1 occurrence110–107 Mya — about 0.9 occurrences107–105 Mya — about 0.5 occurrences105–102 Mya — about 0.2 occurrences102–99 Mya — about 0.9 occurrences99–97 Mya — about 2 occurrences97–94 Mya — about 2 occurrences94–91 Mya — about 2 occurrences91–89 Mya — about 1 occurrence86–83 Mya — about 1 occurrence83–80 Mya — about 2 occurrences80–78 Mya — about 2 occurrences78–75 Mya — about 2 occurrences75–72 Mya — about 2 occurrences72–70 Mya — about 45 occurrences70–67 Mya — about 50 occurrences67–64 Mya — about 21 occurrences137.05 Mya72.2 Mya145 Mya64 Mya

136 occurrences of Cyclorisma 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

136 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

18 formations

Providence — 31.97°N, 86.00°WProvidence — 31.92°N, 85.82°WProvidence — 31.89°N, 85.70°WProvidence — 31.95°N, 85.68°WProvidence — 31.92°N, 85.35°WProvidence — 31.84°N, 85.22°WProvidence — 31.75°N, 85.12°WProvidence — 31.77°N, 85.14°WProvidence — 31.80°N, 85.00°WProvidence — 31.89°N, 85.21°WNacatoch Sand — 32.10°N, 96.47°WNacatoch Sand — 32.59°N, 96.31°WPrairie Bluff — 32.73°N, 88.30°WPrairie Bluff — 32.43°N, 88.04°WPrairie Bluff — 32.23°N, 87.50°WPrairie Bluff — 32.05°N, 86.99°WPrairie Bluff — 31.95°N, 86.70°WPrairie Bluff — 31.97°N, 86.00°WPrairie Bluff — 32.05°N, 86.78°WSevern — 38.89°N, 76.85°WSevern — 38.92°N, 76.85°WPeedee — 34.03°N, 79.82°WPeedee — 33.99°N, 79.52°WPeedee — 33.90°N, 79.43°WPeedee — 33.83°N, 79.25°WLopez de Bertodano — 64.25°S, 56.75°WLopez de Bertodano — 64.17°S, 57.75°WCorsicana Marl — 32.88°N, 96.20°WCorsicana Marl — 30.37°N, 97.46°WCorsicana Marl — 30.37°N, 97.45°WCorsicana Marl — 29.83°N, 97.84°WChiwapa — 34.60°N, 88.95°WChiwapa — 34.35°N, 88.92°WOwl Creek — 34.78°N, 88.89°WOwl Creek — 34.88°N, 88.87°WCotinguiba — 10.86°S, 37.15°WCarbonera — 24.22°N, 102.82°WWoodbine — 33.87°N, 95.57°WToreva — 35.74°N, 110.82°WDakota — 35.73°N, 110.83°WRipley — 32.05°N, 86.78°WDunvegan — 56.25°N, 118.95°WHochmoos — 47.57°N, 13.52°EBelle Fourche — 47.00°N, 107.88°W

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The named rock units Cyclorisma has been recovered from, largest first. Drawn where the rock is now, not where it formed. 20 occurrences have no formation on record, which is common for older literature.

Cyclorisma and its relatives

Late Cretaceous

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

Found in the same rock

607 taxa

The Paleobiology Database records 128 sites for Cyclorisma, and this reads all of them. Of that, one read hit the database's own return limit, so every count below is a floor rather than a total. 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

18 references

Each of the 136 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. 6 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 Cyclorisma

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

No 3D scan of Cyclorisma was found in MorphoSource and Sketchfab.

Smithsonian Open Access was 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 itTapetini through timeFormations of the Late CretaceousThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. (Dall 1902)