Diadematacea

The Diadematacea are a superorder of sea urchins. Unlike most other sea urchins, they generally have hollow spines. The tubercles on their tests are perforated, and most species possess gills.

Diadematacea

Spaully at English Wikipedia · CC BY-SA 1.0 · 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
EuechinoideaPBDB
Diet
grazer, deposit feederPBDB, for Echinoidea
Life habit
epifaunalPBDB, for Echinoidea
Motility
actively mobilePBDB, for Echinoidea
Vision
limitedPBDB, for Echinoidea
Environment
marinePBDB, for Echinodermata

Time the record covers

At most 3.9 million years on record.

The one occurrence read is dated to somewhere between 37.71 Mya and 33.9 Mya, which is a dating window rather than a span.

Eocene — about 1 of 1 occurrenceEoceneOligocene — about 0 of 1 occurrence38–38 Mya — about 0.0 occurrences38–37 Mya — about 0.0 occurrences37–37 Mya — about 0.0 occurrences37–37 Mya — about 0.0 occurrences37–37 Mya — about 0.0 occurrences37–37 Mya — about 0.0 occurrences37–37 Mya — about 0.0 occurrences37–36 Mya — about 0.0 occurrences36–36 Mya — about 0.0 occurrences36–36 Mya — about 0.0 occurrences36–36 Mya — about 0.0 occurrences36–36 Mya — about 0.0 occurrences36–36 Mya — about 0.0 occurrences36–35 Mya — about 0.0 occurrences35–35 Mya — about 0.0 occurrences35–35 Mya — about 0.0 occurrences35–35 Mya — about 0.0 occurrences35–35 Mya — about 0.0 occurrences35–35 Mya — about 0.0 occurrences35–35 Mya — about 0.0 occurrences35–34 Mya — about 0.0 occurrences34–34 Mya — about 0.0 occurrences34–34 Mya — about 0.0 occurrences34–34 Mya — about 0.0 occurrences38.21 Mya33.4 Mya

1 occurrence of Diadematacea on record, most of them in the Eocene. The Paleobiology Database records this as a living group, and the chart stops with its fossils rather than at the present. 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

1 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

1 formation

Crystal River Limestone — 28.93°N, 82.70°W

Loading coastlines…

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

Diadematacea and its relatives

Eocene

Where Diadematacea and its relatives were recorded in the Eocene.

Found in the same rock

25 taxa

The Paleobiology Database records 1 site for Diadematacea, 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

1 reference

Each of the 1 occurrence 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 doi.org. Relayed as the Paleobiology Database holds them, not checked against what they resolve to.

Media and terms

Media content1

Picture of Diadematacea

Credit
Spaully at English Wikipedia
Licence
CC BY-SA 1.0
Commercial use
the licence allows it

No 3D scan of Diadematacea 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.

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 itEuechinoidea through timeFormations of the EoceneThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. (Duncan 1889)