Exocrinus
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
- ArticuliformesPBDB
- Diet
- suspension feederPBDB, for Cladida
- Life habit
- intermediate-level epifaunalPBDB, for Cladida
- Motility
- stationary, attachedPBDB, for Cladida
- Vision
- blindPBDB, for Crinoidea
- Environment
- marinePBDB, for Echinodermata
Time the record covers
At least 13 million years on record.
The record covers at least 303.7 Mya to 290.1 Mya. No occurrence read is dated outside 306 Mya to 283.3 Mya.
20 occurrences of Exocrinus on record, most of them in the Carboniferous. 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- Carboniferous78%
- Permian22%
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
- Stanton Formation · Lansing Group9
- Barnsdall Formation · Lansing Group5
- Bird Spring Formation3
- Kanwaka Formation · Shawnee Group2
- Bond Formation · McLeansboro Group1
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The named rock units Exocrinus has been recovered from, largest first. Drawn where the rock is now, not where it formed.
Exocrinus and its relatives
CarboniferousWhere Exocrinus and its relatives were recorded in the Carboniferous.
Found in the same rock
127 taxa- Apographiocrinus13 sites
- Delocrinus13 sites
- Stellarocrinus13 sites
- Erisocrinus12 sites
- Pirasocrinidae12 sites
- Cibolocrinus11 sites
- Scytalocrinidae11 sites
- Ampelocrinidae10 sites
- Cymbiocrinidae10 sites
- Elibatocrinus10 sites
- Exoriocrinus10 sites
- Stenopecrinidae indet.10 sites
- Galateacrinus9 sites
- Kallimorphocrinus9 sites
- Cromyocrinidae8 sites
- Laudonocrinidae8 sites
- Paramphicrinus8 sites
- Euonychocrinus7 sites
- Glaukosocrinus7 sites
- Plummericrinus7 sites
- Ulocrinus7 sites
- Graffhamicrinus6 sites
- Lecythiocrinus4 sites
- Arroyocrinus popenoei3 sites
The Paleobiology Database records 20 sites for Exocrinus, 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
5 references- Filtration models, guilds, and biofacies: crinoid paleoecology of the Stanton Formation (Upper Pennsylvanian), Midcontinent, North America13
- New Permian crinoids from the Battleship Wash patch reef in southern Nevada3
- Taphonomic Analysis and Systematic Descriptions of Some Late Pennsylvanian and Early Permian Crinoids from Southeastern Nebraska, Eastern Kansas and Southwestern Iowa2
- Genus-level taphonomic variation within cladid crinoids from the upper Pennsylvanian Barnsdall Formation, Northeastern Oklahoma1
- Crinoids of the LaSalle Limestone (Pennsylvanian) of Illinois1
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 Exocrinus
- Source
- iDigBio
- Credit
- via iDigBio
- Licence
- CC0
- Commercial use
- the licence allows it
No 3D scan was found. Smithsonian Open Access, MorphoSource and Sketchfab were all searched.
This is what the site found, which is not the same as what exists.
Keep going
What may have been alongside itArticuliformes through timeFormations of the CarboniferousThe world it lived on
Occurrence data from the Paleobiology Database, CC BY 4.0. Strimple 1949