Ristnacrinus

Ristnacrinus

via iDigBio · CC0 · 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
IocrinidaePBDB
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 8 million years on record.

The record covers at least 456.8 Mya to 448.8 Mya. No occurrence read is dated outside 458.2 Mya to 443.1 Mya.

Ordovician — about 55 of 55 occurrencesOrdovicianSilurian — about 0 of 55 occurrences459–458 Mya — about 0.0 occurrences458–458 Mya — about 1 occurrence458–457 Mya — about 1 occurrence457–457 Mya — about 1 occurrence457–456 Mya — about 0.9 occurrences456–455 Mya — about 0.9 occurrences455–455 Mya — about 0.9 occurrences455–454 Mya — about 0.9 occurrences454–454 Mya — about 1 occurrence454–453 Mya — about 7 occurrences453–453 Mya — about 7 occurrences453–452 Mya — about 4 occurrences452–452 Mya — about 4 occurrences452–451 Mya — about 4 occurrences451–451 Mya — about 4 occurrences451–450 Mya — about 4 occurrences450–450 Mya — about 2 occurrences450–449 Mya — about 2 occurrences449–449 Mya — about 2 occurrences449–448 Mya — about 0.9 occurrences448–447 Mya — about 0.9 occurrences447–447 Mya — about 0.9 occurrences447–446 Mya — about 0.9 occurrences446–446 Mya — about 0.9 occurrences446–445 Mya — about 0.9 occurrences445–445 Mya — about 0.3 occurrences445–444 Mya — about 0.2 occurrences444–444 Mya — about 0.2 occurrences444–443 Mya — about 0.2 occurrences443–443 Mya — about 0.0 occurrences456.8 Mya448.8 Mya458.7 Mya442.6 Mya

55 occurrences of Ristnacrinus 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

55 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

16 formations

Kahula — 59.00°N, 26.00°EKahula — 59.25°N, 27.45°EKahula — 59.26°N, 27.40°EKahula — 59.27°N, 23.75°EAluvere — 59.34°N, 27.41°EAluvere — 59.30°N, 27.51°EAluvere — 59.31°N, 24.31°EAluvere — 59.37°N, 24.50°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°EKeisley Limestone — 54.61°N, 2.45°WKeisley Limestone — 54.62°N, 2.45°WBoda Limestone — 61.05°N, 15.20°EVasalemma — 59.24°N, 24.29°ECystoid Limestone — 41.15°N, 1.20°WCystoid Limestone — 41.17°N, 1.15°WPortixeddu — 39.23°N, 8.51°ESholeshook — 51.82°N, 4.95°WRhiwlas — 52.91°N, 3.60°WKeisley — 54.62°N, 2.45°WPorto de Santa Anna — 40.38°N, 8.35°WJohvi — 59.34°N, 27.41°EFerradosa — 40.31°N, 8.33°W

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The named rock units Ristnacrinus has been recovered from, largest first. Drawn where the rock is now, not where it formed. 19 occurrences have no formation on record, which is common for older literature.

Ristnacrinus and its relatives

Ordovician

Where Ristnacrinus and its relatives were recorded in the Ordovician.

Found in the same rock

258 taxa

The Paleobiology Database records 46 sites for Ristnacrinus, 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

13 references

Each of the 55 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. 1 further reference is not listed. 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

Source
iDigBio
Credit
via iDigBio
Licence
CC0
Commercial use
the licence allows it

No 3D scan of Ristnacrinus was found in MorphoSource and Sketchfab.

Smithsonian Open Access was 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 itIocrinidae through timeFormations of the OrdovicianThe world it lived on

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