Periechocrinus

Periechocrinus is an extinct genus of crinoids belonging to the order Monobathrida, family Periechecrinidae.

Periechocrinus

Hectonichus · CC BY-SA 3.0 · 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
PeriechocrinidaePBDB
Diet
suspension feederPBDB
Life habit
upper-level epifaunalPBDB
Motility
stationary, attachedPBDB
Vision
blindPBDB, for Crinoidea
Environment
marinePBDB, for Echinodermata

Time the record covers

At least 74 million years on record.

The record covers at least 432.9 Mya to 358.86 Mya. No occurrence read is dated outside 443.1 Mya to 323.4 Mya.

Ordovician — about 0 of 40 occurrencesSilurian — about 38 of 40 occurrencesSilurianDevonian — about 0 of 40 occurrencesCarboniferous — about 2 of 40 occurrencesCarboniferous445–441 Mya — about 0.4 occurrences441–437 Mya — about 2 occurrences437–433 Mya — about 4 occurrences433–429 Mya — about 18 occurrences429–425 Mya — about 10 occurrences425–421 Mya — about 3 occurrences421–416 Mya — about 0.9 occurrences363–358 Mya — about 0.1 occurrences358–354 Mya — about 0.5 occurrences354–350 Mya — about 0.5 occurrences350–346 Mya — about 0.4 occurrences346–342 Mya — about 0.1 occurrences342–338 Mya — about 0.1 occurrences338–333 Mya — about 0.1 occurrences333–329 Mya — about 0.1 occurrences329–325 Mya — about 0.1 occurrences325–321 Mya — about 0.1 occurrences432.9 Mya358.86 Mya445 Mya321 Mya

40 occurrences of Periechocrinus on record, most of them in the Silurian. 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

40 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

15 formations

Racine — 42.73°N, 87.78°WRacine — 42.88°N, 88.04°WRacine — 43.01°N, 88.38°WRacine — 41.85°N, 87.65°WScotch Grove — 42.00°N, 91.00°WScotch Grove — 42.00°N, 90.50°WScotch Grove — 42.12°N, 91.13°WScotch Grove — 42.48°N, 90.87°WScotch Grove — 41.85°N, 90.18°WScotch Grove — 42.10°N, 91.28°WGower — 41.51°N, 90.58°WLockport — 43.15°N, 77.62°WGasport Limestone — 43.20°N, 78.58°WGasport Limstone — 43.20°N, 78.58°WKopanina — 49.96°N, 14.18°EWaldron Shale — 39.00°N, 86.00°WRacine Dolomite — 41.57°N, 87.60°WLaurel Limestone — 39.43°N, 85.63°WOsgood Shale — 39.13°N, 85.30°WKeyser Limestone — 39.45°N, 78.97°WRochester Shale — 43.03°N, 79.28°WMuch Wenlock — 52.50°N, 2.08°WMirari — 32.51°S, 151.66°E

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The named rock units Periechocrinus has been recovered from, largest first. Drawn where the rock is now, not where it formed. 6 occurrences have no formation on record, which is common for older literature.

Periechocrinus and its relatives

Silurian

Where Periechocrinus and its relatives were recorded in the Silurian.

Found in the same rock

512 taxa

The Paleobiology Database records 29 sites for Periechocrinus, 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

10 references

Each of the 40 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 content2

Picture of Periechocrinus

Credit
Hectonichus
Licence
CC BY-SA 3.0
Commercial use
the licence allows it

3D model

Source
Sketchfab
Licence
CC Attribution-NonCommercial
Commercial use
the licence does not allow it

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 itPeriechocrinidae through timeFormations of the SilurianThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. Morris 1843