Arctinurus

Smokeybjb · CC BY-SA 3.0 · via Wikidata/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
- PlatylichiniPBDB
- Diet
- carnivorePBDB, for Lichida
- Life habit
- low-level epifaunalPBDB, for Trilobita
- Motility
- fast-movingPBDB, for Trilobita
- Vision
- well-developedPBDB, for Lichidae
- Environment
- marinePBDB, for Trilobita
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 449.6 Mya to 419.62 Mya.
60 occurrences of Arctinurus 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
60 occurrences- Ordovician2%
- Silurian98%
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
25 formations
- Rochester Formation · Clinton Group8
- Jupiter Formation7
- Rochester Shale Formation · Clinton Group5
- Racine Dolomite Formation5
- Racine Formation4
- Waldron Shale Formation3
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The named rock units Arctinurus has been recovered from, largest first. Drawn where the rock is now, not where it formed. One further formation holds fewer occurrences and is not listed. 4 occurrences have no formation on record, which is common for older literature.
Arctinurus and its relatives
SilurianWhere Arctinurus and its relatives were recorded in the Silurian.
Found in the same rock
827 taxa- Dalmanites27 sites
- Atrypa reticularis25 sites
- Leptaena rhomboidalis24 sites
- Bryozoa22 sites
- Bumastus22 sites
- Favosites22 sites
- Eospirifer radiatus19 sites
- Calymene18 sites
- Eucalyptocrinites18 sites
- Dimerocrinites15 sites
- Fardenia (Coolinia)15 sites
- Stegerhynchus15 sites
- Whitfieldella nitida15 sites
- Macrostylocrinus14 sites
- Nucleospira14 sites
- Pterinea14 sites
- Fenestella13 sites
- Rugosa13 sites
- Stenopareia13 sites
- Anastrophia12 sites
- Cornulites12 sites
- Eodictyonella12 sites
- Gastropoda12 sites
- Lecanocrinus12 sites
The Paleobiology Database records 59 sites for Arctinurus, 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
17 references- Caradocian-Gedinnian echinoderm associations of Central and Eastern North America12
- The Clinton of Western and Central New York9
- Early Silurian trilobites of Anticosti Island, Québec, Canada8
- Silurian trilobite associations in North America8
- Silurian Reefs of Gotland5
- The Silurian (Wenlockian) reef fauna of Southeastern Wisconsin3
- Wenlockian fossil communities in New York State and adjacent areas: Paleontology and Paleoecology2
- Silurian brachiopod and related benthic communities from carbonate platform and mound environments of Iowa and surrounding areas2
- Trilobites in Paleozoic carbonate buildups2
- Stratigraphy and palaeontology of the Interlake Group and Stonewall Formation of Southern Manitoba2
- Middle Silurian trilobites from Arkansas and Oklahoma, USA. Orders Lichida and Odontopleurida1
- Silurian communities of the Oslo Region, Norway1
Each of the 60 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. 5 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 content1

Picture of Arctinurus
- Source
- Wikidata/Commons
- Credit
- Smokeybjb
- Licence
- CC BY-SA 3.0
- 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 itPlatylichini through timeFormations of the SilurianThe world it lived on
Occurrence data from the Paleobiology Database, CC BY 4.0. (Castelnau 1843)