Iocrinus

Iocrinus is an extinct genus of crinoid. It is an early form of crinoid, from the Ordovician rock of North America, England, and Gilwern Hill, Powys in Wales.

Iocrinus

Daderot · CC0 · 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
IocrinidaePBDB
Diet
suspension feederPBDB
Life habit
intermediate-level epifaunalPBDB
Motility
stationary, attachedPBDB
Vision
blindPBDB, for Crinoidea
Environment
marinePBDB, for Echinodermata

Time the record covers

At least 21 million years on record.

The record covers at least 471.3 Mya to 449.6 Mya. No occurrence read is dated outside 477.1 Mya to 443.1 Mya.

Ordovician — about 76 of 76 occurrencesOrdovicianSilurian — about 0 of 76 occurrences478–477 Mya — about 0.1 occurrences477–475 Mya — about 0.2 occurrences475–474 Mya — about 0.2 occurrences474–473 Mya — about 0.2 occurrences473–472 Mya — about 0.2 occurrences472–471 Mya — about 0.3 occurrences471–470 Mya — about 0.4 occurrences470–468 Mya — about 0.4 occurrences468–467 Mya — about 0.5 occurrences467–466 Mya — about 0.6 occurrences466–465 Mya — about 0.6 occurrences465–464 Mya — about 0.6 occurrences464–462 Mya — about 0.6 occurrences462–461 Mya — about 0.6 occurrences461–460 Mya — about 0.6 occurrences460–459 Mya — about 0.6 occurrences459–458 Mya — about 0.4 occurrences458–457 Mya — about 2 occurrences457–455 Mya — about 3 occurrences455–454 Mya — about 3 occurrences454–453 Mya — about 5 occurrences453–452 Mya — about 6 occurrences452–451 Mya — about 8 occurrences451–449 Mya — about 20 occurrences449–448 Mya — about 6 occurrences448–447 Mya — about 6 occurrences447–446 Mya — about 6 occurrences446–445 Mya — about 3 occurrences445–444 Mya — about 0.5 occurrences444–442 Mya — about 0.2 occurrences471.3 Mya449.6 Mya477.8 Mya442.4 Mya

76 occurrences of Iocrinus 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

76 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

24 formations

Denley Limestone — 43.21°N, 75.46°WDenley Limestone — 43.88°N, 75.49°WWaynesville — 39.45°N, 83.83°WWaynesville — 39.00°N, 84.00°WWaynesville — 39.48°N, 84.07°WWaynesville — 39.36°N, 84.36°WWaynesville — 39.33°N, 84.07°WWaynesville — 38.77°N, 85.36°WCorryville — 39.00°N, 84.00°WCorryville — 39.43°N, 84.60°WCorryville — 39.17°N, 84.12°WCorryville — 39.30°N, 84.40°WCorryville — 38.68°N, 83.79°WKope — 39.00°N, 84.00°WKope — 39.01°N, 84.45°WLiberty — 39.49°N, 84.95°WLiberty — 39.48°N, 84.06°WLiberty — 39.48°N, 84.05°WLiberty — 38.78°N, 85.37°WSugar River Limestone — 44.00°N, 75.00°WSugar River Limestone — 43.00°N, 75.00°WKings Falls — 43.21°N, 75.46°WFairview — 39.00°N, 84.00°WBellevue — 39.00°N, 84.00°WBellevue — 39.30°N, 84.40°WMount Auburn — 39.00°N, 84.00°WMount Auburn — 38.87°N, 83.91°WSunset — 39.43°N, 84.60°WSunset — 39.13°N, 84.62°WBuilth Volcanic — 52.24°N, 3.28°WSugar River — 43.21°N, 75.46°WGrant Lake — 39.25°N, 84.25°WFort Atkinson — 43.13°N, 91.88°WScales Shale — 42.00°N, 90.50°WFort Atkinson Limestone — 42.00°N, 93.50°WMartinsburg — 40.48°N, 76.53°WOregonia — 39.44°N, 84.98°WSheguiandah — 45.95°N, 81.91°WBobcaygeon-Verulam — 44.57°N, 79.10°WVerulam — 44.50°N, 79.16°WUpper Fezouata — 30.48°N, 5.67°WNeuville — 47.07°N, 70.86°W

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

Iocrinus and its relatives

Ordovician

Where Iocrinus and its relatives were recorded in the Ordovician.

Found in the same rock

482 taxa

The Paleobiology Database records 71 sites for Iocrinus, 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

15 references

Each of the 76 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. 3 further references are 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 content2

Picture of Iocrinus

Credit
Daderot
Licence
CC0
Commercial use
the licence allows it

3D model

Source
Sketchfab
Licence
CC Attribution
Commercial use
cannot be read from the licence given — check the record

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

Occurrence data from the Paleobiology Database, CC BY 4.0. Hall 1866