Periaster

Periaster

via iDigBio · 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
HemiasteridaePBDB
Diet
deposit feeder, detritivorePBDB, for Spatangoida
Life habit
shallow infaunalPBDB, for Spatangoida
Motility
slow-movingPBDB, for Spatangoida
Vision
limitedPBDB, for Echinoidea
Environment
marinePBDB, for Spatangoida

Time the record covers

At least 27 million years on record.

The record covers at least 93.9 Mya to 66 Mya. No occurrence read is dated outside 100.5 Mya to 61.66 Mya.

Early Cretaceous — about 0 of 20 occurrencesLate Cretaceous — about 18 of 20 occurrencesLate CretaceousPaleocene — about 2 of 20 occurrencesPaleocene101–100 Mya — about 1 occurrence100–99 Mya — about 3 occurrences99–97 Mya — about 3 occurrences97–96 Mya — about 3 occurrences96–95 Mya — about 3 occurrences95–93 Mya — about 2 occurrences93–92 Mya — about 1 occurrence92–91 Mya — about 1 occurrence91–89 Mya — about 0.7 occurrences84–82 Mya — about 0.1 occurrences82–81 Mya — about 0.1 occurrences81–80 Mya — about 0.1 occurrences80–78 Mya — about 0.1 occurrences78–77 Mya — about 0.1 occurrences77–76 Mya — about 0.1 occurrences76–74 Mya — about 0.1 occurrences74–73 Mya — about 0.1 occurrences73–72 Mya — about 0.1 occurrences72–70 Mya — about 0.1 occurrences70–69 Mya — about 0.1 occurrences69–68 Mya — about 0.1 occurrences68–66 Mya — about 0.1 occurrences66–65 Mya — about 0.5 occurrences65–64 Mya — about 0.6 occurrences64–62 Mya — about 0.6 occurrences62–61 Mya — about 0.3 occurrences93.9 Mya66 Mya101.3 Mya60.9 Mya

20 occurrences of Periaster 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

20 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

Locatelli — 37.04°N, 122.07°WBagua — 5.74°S, 78.51°W

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The named rock units Periaster has been recovered from, largest first. Drawn where the rock is now, not where it formed. 17 occurrences have no formation on record, which is common for older literature.

Periaster and its relatives

Late Cretaceous

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

Found in the same rock

150 taxa

The Paleobiology Database records 19 sites for Periaster, 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

6 references

Each of the 20 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 content1

Picture of Periaster

Source
iDigBio
Credit
via iDigBio
Licence
not stated by the source
Commercial use
cannot be read from the licence given — check the record

No 3D scan of Periaster was found in Sketchfab.

Smithsonian Open Access and MorphoSource were 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 itHemiasteridae through timeFormations of the Late CretaceousThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0.