Anacheirurus

Anacheirurus is a genus of trilobites. It was described by Reed in 1896, as a new genus for the species Cheirurus frederici, and was originally described by Salter in 1864.

Anacheirurus

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
PilekiinaePBDB
Diet
carnivorePBDB, for Cheiruridae
Life habit
low-level epifaunalPBDB, for Trilobita
Motility
fast-movingPBDB, for Trilobita
Vision
well-developedPBDB, for Pilekiinae
Environment
marinePBDB, for Trilobita

Time the record covers

At most 9.8 million years on record.

Every occurrence read is dated to somewhere between 486.85 Mya and 477.1 Mya, and nothing in the dating separates them, so that window is what the record shows rather than a span.

Cambrian — about 0 of 5 occurrencesOrdovician — about 5 of 5 occurrencesOrdovician487–487 Mya — about 0.0 occurrences487–486 Mya — about 0.1 occurrences486–486 Mya — about 0.2 occurrences486–486 Mya — about 0.2 occurrences486–485 Mya — about 0.2 occurrences485–485 Mya — about 0.2 occurrences485–484 Mya — about 0.2 occurrences484–484 Mya — about 0.2 occurrences484–484 Mya — about 0.2 occurrences484–483 Mya — about 0.2 occurrences483–483 Mya — about 0.2 occurrences483–483 Mya — about 0.2 occurrences483–482 Mya — about 0.2 occurrences482–482 Mya — about 0.2 occurrences482–482 Mya — about 0.2 occurrences482–481 Mya — about 0.2 occurrences481–481 Mya — about 0.2 occurrences481–481 Mya — about 0.2 occurrences481–480 Mya — about 0.2 occurrences480–480 Mya — about 0.2 occurrences480–479 Mya — about 0.2 occurrences479–479 Mya — about 0.2 occurrences479–479 Mya — about 0.2 occurrences479–478 Mya — about 0.2 occurrences478–478 Mya — about 0.2 occurrences478–478 Mya — about 0.2 occurrences478–477 Mya — about 0.2 occurrences477–477 Mya — about 0.1 occurrences487.4 Mya476.6 Mya

5 occurrences of Anacheirurus 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

5 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

3 formations

Trenice — 49.78°N, 13.68°EMilina — 49.77°N, 13.80°EFezouata Shale — 30.35°N, 6.30°W

Loading coastlines…

The named rock units Anacheirurus 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.

Anacheirurus and its relatives

Ordovician

Where Anacheirurus and its relatives were recorded in the Ordovician.

Found in the same rock

70 taxa

The Paleobiology Database records 5 sites for Anacheirurus, 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 5 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 Anacheirurus

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

No 3D scan of Anacheirurus was found in Sketchfab.

Smithsonian Open Access and MorphoSource were 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 itPilekiinae through timeFormations of the OrdovicianThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. Reed 1896