Semicircularea arcuata

No picture of Semicircularea arcuata was found. Wikipedia and Wikidata were searched and had none. iDigBio and GBIF were not searched: the Paleobiology Database does not place Semicircularea arcuata firmly enough to tell it from something else bearing the same name, and a search on the name alone returns whichever of them was photographed. Smithsonian Open Access did not answer, so this is what the others held rather than everything there is.

Time the record covers

At most 11 million years on record.

Every occurrence read is dated to somewhere between 497 Mya and 486.85 Mya, and nothing in the dating separates them, so that window is what the record shows rather than a span.

Cambrian — about 12 of 12 occurrencesCambrianOrdovician — about 0 of 12 occurrences497–497 Mya — about 0.3 occurrences497–496 Mya — about 0.4 occurrences496–496 Mya — about 0.4 occurrences496–496 Mya — about 0.4 occurrences496–495 Mya — about 0.4 occurrences495–495 Mya — about 0.4 occurrences495–495 Mya — about 0.4 occurrences495–494 Mya — about 0.4 occurrences494–494 Mya — about 0.4 occurrences494–493 Mya — about 0.4 occurrences493–493 Mya — about 0.4 occurrences493–493 Mya — about 0.4 occurrences493–492 Mya — about 0.4 occurrences492–492 Mya — about 0.4 occurrences492–492 Mya — about 0.4 occurrences492–491 Mya — about 0.4 occurrences491–491 Mya — about 0.4 occurrences491–490 Mya — about 0.4 occurrences490–490 Mya — about 0.4 occurrences490–490 Mya — about 0.4 occurrences490–489 Mya — about 0.4 occurrences489–489 Mya — about 0.4 occurrences489–489 Mya — about 0.4 occurrences489–488 Mya — about 0.4 occurrences488–488 Mya — about 0.4 occurrences488–487 Mya — about 0.4 occurrences487–487 Mya — about 0.4 occurrences487–487 Mya — about 0.3 occurrences497.5 Mya486.4 Mya

12 occurrences of Semicircularea arcuata on record, most of them in the Cambrian. 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

12 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

2 formations

DuNoir — 43.28°N, 109.83°WDuNoir Limestone — 43.29°N, 109.83°W

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The named rock units Semicircularea arcuata has been recovered from, largest first. Drawn where the rock is now, not where it formed.

Semicircularea arcuata and its relatives

Cambrian

Where Semicircularea arcuata and its relatives were recorded in the Cambrian.

Found in the same rock

20 taxa

The Paleobiology Database records 12 sites for Semicircularea arcuata, and this reads all of them. The number is how many of those sites it was catalogued from too.

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

1 reference

Each of the 12 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. Each entry links to the Paleobiology Database's own record for the work.

Media and terms

Media content0

No picture of Semicircularea arcuata was found. Wikipedia and Wikidata were searched and had none.

iDigBio and GBIF were not searched: the Paleobiology Database does not place Semicircularea arcuata firmly enough to tell it from something else bearing the same name, and a search on the name alone returns whichever of them was photographed.

Smithsonian Open Access did not answer, so this is what the others held rather than everything there is.

No 3D scan of Semicircularea arcuata 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 itFormations of the CambrianThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0.