Rotadiscus

Rotadiscus is a genus of discoidal animal known from the Cambrian Chengjiang biota and classified with the eldonioids.

Rotadiscus

Lukas Large · CC BY-SA 2.0 · via Wikipedia/Commons. 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
RotadiscidaePBDB
Diet
suspension feederPBDB
Life habit
nektonicPBDB
Motility
actively mobilePBDB

Time the record covers

At least 468 million years on record.

The record covers at least 516 Mya to 48 Mya. No occurrence read is dated outside 521 Mya to 42 Mya.

Cambrian — about 1 of 2 occurrencesCambrianOrdovician — about 0 of 2 occurrencesSilurian — about 0 of 2 occurrencesDevonian — about 0 of 2 occurrencesCarboniferous — about 0 of 2 occurrencesPermian — about 0 of 2 occurrencesEarly Triassic — about 0 of 2 occurrencesMiddle Triassic — about 0 of 2 occurrencesLate Triassic — about 0 of 2 occurrencesEarly Jurassic — about 0 of 2 occurrencesMiddle Jurassic — about 0 of 2 occurrencesLate Jurassic — about 0 of 2 occurrencesEarly Cretaceous — about 0 of 2 occurrencesLate Cretaceous — about 0 of 2 occurrencesPaleocene — about 0 of 2 occurrencesEocene — about 1 of 2 occurrencesOligocene — about 0 of 2 occurrences531–514 Mya — about 1 occurrence49–32 Mya — about 1 occurrence516 Mya48 Mya531 Mya32 Mya

2 occurrences of Rotadiscus 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

2 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

Yuanshan — 24.00°N, 102.00°ESarmiento — 42.90°S, 71.32°W

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

Rotadiscus and its relatives

Cambrian

Where Rotadiscus and its relatives were recorded in the Cambrian.

Found in the same rock

37 taxa

The Paleobiology Database records 2 sites for Rotadiscus, 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

2 references

Each of the 2 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 content1

Picture of Rotadiscus

Credit
Lukas Large
Licence
CC BY-SA 2.0
Commercial use
the licence allows it

No 3D scan was found. Smithsonian Open Access, MorphoSource and Sketchfab were all searched.

The description on this site

Licence
CC BY-SA 4.0

This is what the site found, which is not the same as what exists.

Keep going

What may have been alongside itRotadiscidae through timeFormations of the CambrianThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. Sun and Hou 1987