Ptychocrinus

Ptychocrinus

via iDigBio · 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
DimerocrinitidaePBDB
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 11 million years on record.

The record covers at least 449.6 Mya to 438.6 Mya. No occurrence read is dated outside 457.3 Mya to 432.9 Mya.

Ordovician — about 12 of 20 occurrencesOrdovicianSilurian — about 8 of 20 occurrencesSilurian458–457 Mya — about 0.2 occurrences457–456 Mya — about 0.6 occurrences456–455 Mya — about 0.6 occurrences455–454 Mya — about 0.6 occurrences454–454 Mya — about 0.6 occurrences454–453 Mya — about 0.6 occurrences453–452 Mya — about 0.6 occurrences452–451 Mya — about 0.6 occurrences451–450 Mya — about 0.8 occurrences450–449 Mya — about 6 occurrences449–448 Mya — about 0.2 occurrences448–448 Mya — about 0.2 occurrences448–447 Mya — about 0.2 occurrences447–446 Mya — about 0.2 occurrences446–445 Mya — about 0.1 occurrences443–443 Mya — about 0.7 occurrences443–442 Mya — about 1 occurrence442–441 Mya — about 1 occurrence441–440 Mya — about 0.7 occurrences440–439 Mya — about 0.4 occurrences439–438 Mya — about 0.5 occurrences438–437 Mya — about 0.6 occurrences437–437 Mya — about 0.6 occurrences437–436 Mya — about 0.6 occurrences436–435 Mya — about 0.6 occurrences435–434 Mya — about 0.6 occurrences434–433 Mya — about 0.6 occurrences433–432 Mya — about 0.2 occurrences449.6 Mya438.6 Mya457.8 Mya432.4 Mya

20 occurrences of Ptychocrinus 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

20 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

13 formations

Dunleith — 42.00°N, 90.50°WFairview — 39.00°N, 84.00°WFairview — 39.03°N, 84.51°WCabot Head — 43.14°N, 79.38°WCalloway Creek — 37.59°N, 85.07°WCalloway Creek — 37.66°N, 85.17°WPower Glen Shale — 43.00°N, 79.25°WBear Creek Shale — 43.15°N, 77.06°WProsser Limestone — 44.00°N, 92.00°WSunset — 39.43°N, 84.60°WStingy Creek — 37.57°N, 84.61°WReba — 37.58°N, 84.61°WPower Glen — 43.16°N, 79.04°WPower Glen — 43.15°N, 79.37°WMulloch Hill Sandstone — 55.23°N, 4.86°W

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The named rock units Ptychocrinus 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.

Ptychocrinus and its relatives

Ordovician

Where Ptychocrinus and its relatives were recorded in the Ordovician.

Found in the same rock

172 taxa

The Paleobiology Database records 20 sites for Ptychocrinus, 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

8 references

Each of the 20 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 Ptychocrinus

Source
iDigBio
Credit
via iDigBio
Licence
not stated by the source
Commercial use
cannot be read from the licence given — check the record

No 3D scan of Ptychocrinus 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 itDimerocrinitidae through timeFormations of the OrdovicianThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. Wachsmuth and Springer 1885