Isoarca

Isoarca

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
IsoarcidaePBDB
Diet
deposit feederPBDB, for Nuculanoidea
Life habit
infaunalPBDB, for Nuculanoidea
Motility
facultatively mobilePBDB, for Nuculanoidea
Vision
blindPBDB, for Bivalvia

Time the record covers

At least 109 million years on record.

The record covers at least 215.38 Mya to 106.3 Mya. No occurrence read is dated outside 227.3 Mya to 100.5 Mya.

Late Triassic — about 2 of 39 occurrencesLate TriassicEarly Jurassic — about 4 of 39 occurrencesEarly JurassicMiddle Jurassic — about 7 of 39 occurrencesMiddle JurassicLate Jurassic — about 23 of 39 occurrencesLate JurassicEarly Cretaceous — about 3 of 39 occurrencesEarly CretaceousLate Cretaceous — about 0 of 39 occurrences230–225 Mya — about 0.2 occurrences225–221 Mya — about 0.4 occurrences221–217 Mya — about 0.4 occurrences217–212 Mya — about 0.1 occurrences208–203 Mya — about 0.5 occurrences203–199 Mya — about 2 occurrences195–190 Mya — about 0.6 occurrences190–186 Mya — about 1 occurrence186–181 Mya — about 0.4 occurrences177–173 Mya — about 0.2 occurrences173–168 Mya — about 1 occurrence168–164 Mya — about 4 occurrences164–160 Mya — about 1 occurrence160–155 Mya — about 3 occurrences155–151 Mya — about 2 occurrences151–146 Mya — about 12 occurrences146–142 Mya — about 5 occurrences133–129 Mya — about 0.6 occurrences129–124 Mya — about 0.4 occurrences116–111 Mya — about 0.7 occurrences111–107 Mya — about 0.3 occurrences107–102 Mya — about 0.7 occurrences102–98 Mya — about 0.3 occurrences215.38 Mya106.3 Mya230 Mya98 Mya

39 occurrences of Isoarca on record, most of them in the Late 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

39 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

Kehalia — 30.71°N, 33.37°EKehalia — 30.71°N, 33.50°EWest Walton — 52.18°N, 0.12°EKalchreuth — 49.55°N, 11.13°EGrès verts helvétiques — 45.90°N, 6.34°EConglomérats de Bargy — 46.02°N, 6.46°EStrunga — 45.40°N, 25.85°EUpper Trigonia Grit — 51.80°N, 1.88°WMassenkalk — 48.89°N, 11.94°ETotoralillo — 27.36°S, 70.18°WArousiah — 30.66°N, 33.40°E

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The named rock units Isoarca has been recovered from, largest first. Drawn where the rock is now, not where it formed. 27 occurrences have no formation on record, which is common for older literature.

Isoarca and its relatives

Late Jurassic

Where Isoarca and its relatives were recorded in the Late Jurassic.

Found in the same rock

724 taxa

The Paleobiology Database records 25 sites for Isoarca, 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

21 references

Each of the 39 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. 9 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 Isoarca

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

No 3D scan of Isoarca 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 itIsoarcidae through timeFormations of the Late JurassicThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. Muenster 1842