Ristnacrinus marinus

Ristnacrinus marinus

Öpik, Armin · CC BY-NC 4.0 · via GBIF. 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
RistnacrinusPBDB
Diet
suspension feederPBDB, for Disparida
Life habit
intermediate-level epifaunalPBDB, for Disparida
Motility
stationary, attachedPBDB, for Disparida
Vision
blindPBDB, for Crinoidea
Environment
marinePBDB, for Echinodermata

Time the record covers

At least 4 million years on record.

The record covers at least 456.8 Mya to 452.8 Mya. No occurrence read is dated outside 458 Mya to 449.9 Mya.

Ordovician — about 33 of 33 occurrencesOrdovician458–458 Mya — about 0.2 occurrences458–458 Mya — about 0.6 occurrences458–457 Mya — about 0.6 occurrences457–457 Mya — about 0.6 occurrences457–457 Mya — about 0.5 occurrences457–456 Mya — about 0.3 occurrences456–456 Mya — about 0.3 occurrences456–456 Mya — about 0.3 occurrences456–455 Mya — about 0.3 occurrences455–455 Mya — about 0.3 occurrences455–455 Mya — about 0.3 occurrences455–455 Mya — about 0.3 occurrences455–454 Mya — about 0.3 occurrences454–454 Mya — about 0.3 occurrences454–454 Mya — about 3 occurrences454–453 Mya — about 3 occurrences453–453 Mya — about 3 occurrences453–453 Mya — about 3 occurrences453–452 Mya — about 2 occurrences452–452 Mya — about 2 occurrences452–452 Mya — about 2 occurrences452–452 Mya — about 2 occurrences452–451 Mya — about 2 occurrences451–451 Mya — about 2 occurrences451–451 Mya — about 2 occurrences451–450 Mya — about 2 occurrences450–450 Mya — about 2 occurrences450–450 Mya — about 0.6 occurrences456.8 Mya452.8 Mya458.5 Mya449.4 Mya

33 occurrences of Ristnacrinus marinus 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

33 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

7 formations

Aluvere — 59.34°N, 27.41°EAluvere — 59.30°N, 27.51°EAluvere — 59.31°N, 24.31°EAluvere — 59.37°N, 24.50°EKahula — 59.00°N, 26.00°EKahula — 59.26°N, 27.40°EKahula — 59.27°N, 23.75°EMadise — 59.26°N, 27.40°EMadise — 59.31°N, 24.31°EMadise — 59.31°N, 24.43°EPagari — 59.26°N, 27.40°EPagari — 59.31°N, 24.31°EPagari — 59.31°N, 24.43°EKeila — 59.31°N, 24.43°EKeila — 59.30°N, 24.65°EVasalemma — 59.24°N, 24.29°EJohvi — 59.34°N, 27.41°E

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The named rock units Ristnacrinus marinus has been recovered from, largest first. Drawn where the rock is now, not where it formed. 14 occurrences have no formation on record, which is common for older literature.

Ristnacrinus marinus and its relatives

Ordovician

Where Ristnacrinus marinus and its relatives were recorded in the Ordovician.

Found in the same rock

103 taxa

The Paleobiology Database records 33 sites for Ristnacrinus marinus, 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 33 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 Ristnacrinus marinus

Source
GBIF
Credit
Öpik, Armin
Licence
CC BY-NC 4.0
Commercial use
the licence does not allow it

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

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

Keep going

What may have been alongside itRistnacrinus through timeFormations of the OrdovicianThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. Opik 1934