Democrinus

Democrinus

Döderlein, Ludwig; Deutsche Tiefsee-Expedition (1898-1899) · No restrictions · via Wikidata/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
BourgueticrinidaePBDB
Diet
suspension feederPBDB, for Comatulida
Life habit
intermediate-level epifaunalPBDB, for Comatulida
Motility
facultatively mobile, attachedPBDB, for Comatulida
Vision
blindPBDB, for Crinoidea
Environment
marinePBDB, for Comatulida

Time the record covers

At least 24 million years on record.

The record covers at least 66 Mya to 41.03 Mya. No occurrence read is dated outside 72.2 Mya to 37.71 Mya.

Late Cretaceous — about 1 of 9 occurrencesLate CretaceousPaleocene — about 2 of 9 occurrencesPaleoceneEocene — about 6 of 9 occurrencesEocene73–72 Mya — about 0.1 occurrences72–70 Mya — about 0.2 occurrences70–69 Mya — about 0.2 occurrences69–68 Mya — about 0.2 occurrences68–67 Mya — about 0.2 occurrences67–66 Mya — about 0.3 occurrences66–65 Mya — about 0.6 occurrences65–63 Mya — about 0.6 occurrences63–62 Mya — about 0.6 occurrences62–61 Mya — about 0.2 occurrences56–55 Mya — about 0.3 occurrences55–54 Mya — about 0.3 occurrences54–53 Mya — about 0.3 occurrences53–51 Mya — about 0.3 occurrences51–50 Mya — about 0.3 occurrences50–49 Mya — about 0.3 occurrences49–48 Mya — about 0.2 occurrences42–41 Mya — about 0.5 occurrences41–39 Mya — about 1 occurrence39–38 Mya — about 1 occurrence38–37 Mya — about 0.6 occurrences66 Mya41.03 Mya72.9 Mya37 Mya

9 occurrences of Democrinus 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

9 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

5 formations

Castle Hayne — 34.64°N, 77.65°WCastle Hayne — 34.37°N, 77.86°WLondon Clay — 51.40°N, 0.83°ELondon Clay — 51.51°N, 0.24°ESantee Limestone — 33.33°N, 79.69°WHouthem — 50.87°N, 5.78°EWhite Chalk — 54.52°N, 13.63°E

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The named rock units Democrinus has been recovered from, largest first. Drawn where the rock is now, not where it formed. 1 occurrence has no formation on record, which is common for older literature.

Democrinus and its relatives

Eocene

Where Democrinus and its relatives were recorded in the Eocene.

Found in the same rock

481 taxa

The Paleobiology Database records 9 sites for Democrinus, 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

7 references

Each of the 9 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 Democrinus

Credit
Döderlein, Ludwig; Deutsche Tiefsee-Expedition (1898-1899)
Licence
No restrictions
Commercial use
cannot be read from the licence given — check the record

No 3D scan of Democrinus 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 itBourgueticrinidae through timeFormations of the EoceneThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. Perrier 1883