Quadrotheca

No picture of Quadrotheca was found. Wikidata and iDigBio were searched and had none. Wikipedia and Smithsonian Open Access did not answer, so this is what the others held rather than everything there is. GBIF was asked, and what came back is not recorded: nothing, or a picture this site could not tie to Quadrotheca, or no answer at all. This entry cannot say which.

On record

Recorded, not inferred
Sits inside
QuadrothecidaePBDB
Diet
suspension feederPBDB, for Hyolitha
Life habit
epifaunalPBDB, for Hyolitha
Motility
stationaryPBDB, for Hyolitha
Vision
blindPBDB, for Hyolitha
Environment
marinePBDB, for Hyolitha

Time the record covers

At least 71 million years on record.

The record covers at least 521 Mya to 449.5 Mya. No occurrence read is dated outside 530.7 Mya to 445.2 Mya.

Cambrian — about 1 of 3 occurrencesCambrianOrdovician — about 2 of 3 occurrencesOrdovician532–529 Mya — about 0.1 occurrences529–526 Mya — about 0.3 occurrences526–524 Mya — about 0.3 occurrences524–521 Mya — about 0.3 occurrences458–455 Mya — about 0.3 occurrences455–452 Mya — about 0.3 occurrences452–449 Mya — about 0.3 occurrences449–446 Mya — about 0.7 occurrences446–443 Mya — about 0.3 occurrences521 Mya449.5 Mya532 Mya443 Mya

3 occurrences of Quadrotheca on record, most of them in the Ordovician. 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

3 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

3 formations

Huangshandong — 30.83°N, 111.17°ELindegard Mudstone — 55.53°N, 14.23°EMójcza Limestone — 50.83°N, 20.68°E

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

Quadrotheca and its relatives

Ordovician

Where Quadrotheca and its relatives were recorded in the Ordovician.

Found in the same rock

54 taxa

The Paleobiology Database records 3 sites for Quadrotheca, 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

3 references

Each of the 3 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 content0

No picture of Quadrotheca was found. Wikidata and iDigBio were searched and had none.

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

GBIF was asked, and what came back is not recorded: nothing, or a picture this site could not tie to Quadrotheca, or no answer at all. This entry cannot say which.

No 3D scan of Quadrotheca 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 itQuadrothecidae through timeFormations of the OrdovicianThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. Sysoyev 1958