Alisocrinus

Alisocrinus

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
MelocrinitidaePBDB
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 16 million years on record.

The record covers at least 443.1 Mya to 426.7 Mya. No occurrence read is dated outside 445.2 Mya to 422.7 Mya.

Ordovician — about 2 of 8 occurrencesOrdovicianSilurian — about 6 of 8 occurrencesSilurian446–445 Mya — about 0.3 occurrences445–444 Mya — about 0.7 occurrences444–443 Mya — about 0.7 occurrences443–443 Mya — about 0.4 occurrences443–442 Mya — about 0.3 occurrences442–441 Mya — about 0.3 occurrences441–440 Mya — about 0.2 occurrences433–432 Mya — about 0.3 occurrences432–432 Mya — about 0.5 occurrences432–431 Mya — about 0.5 occurrences431–430 Mya — about 0.5 occurrences430–429 Mya — about 0.5 occurrences429–428 Mya — about 0.5 occurrences428–428 Mya — about 0.5 occurrences428–427 Mya — about 0.5 occurrences427–426 Mya — about 0.3 occurrences426–425 Mya — about 0.2 occurrences425–425 Mya — about 0.2 occurrences425–424 Mya — about 0.2 occurrences424–423 Mya — about 0.2 occurrences423–422 Mya — about 0.1 occurrences443.1 Mya426.7 Mya445.7 Mya422.2 Mya

8 occurrences of Alisocrinus 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

8 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

5 formations

Laurel Limestone — 39.43°N, 85.63°WGirardeau Limestone — 37.19°N, 89.45°WGirardeau Limestone — 37.33°N, 89.50°WRochester Shale — 43.12°N, 79.20°WClonbinane Sandstone — 37.00°S, 145.00°EPower Glen — 43.11°N, 79.28°W

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

Alisocrinus and its relatives

Silurian

Where Alisocrinus and its relatives were recorded in the Silurian.

Found in the same rock

70 taxa

The Paleobiology Database records 6 sites for Alisocrinus, 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

4 references

Each of the 8 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 Alisocrinus

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

No 3D scan of Alisocrinus 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 itMelocrinitidae through timeFormations of the SilurianThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. Kirk 1929