Arthrorhachis

No picture of Arthrorhachis was found. Wikidata and iDigBio were searched and had none. Wikipedia has a picture filed under this name, but nothing tied it to Arthrorhachis itself, so it was not used. Smithsonian Open Access did not answer, so this is what the others held rather than everything there is. GBIF was asked, and what came back is not recorded: nothing, or a picture this site could not tie to Arthrorhachis, or no answer at all. This entry cannot say which.

On record

Recorded, not inferred
Sits inside
MetagnostidaePBDB
Diet
detritivorePBDB, for Agnostida
Life habit
epifaunalPBDB, for Agnostida
Motility
slow-movingPBDB, for Agnostida
Vision
blindPBDB, for Metagnostidae

Time the record covers

At least 37 million years on record.

The record covers at least 482.9 Mya to 445.2 Mya. No occurrence read is dated outside 488.9 Mya to 443.1 Mya.

Cambrian — about 0 of 83 occurrencesOrdovician — about 83 of 83 occurrencesOrdovicianSilurian — about 0 of 83 occurrences490–488 Mya — about 0.0 occurrences488–487 Mya — about 0.1 occurrences487–485 Mya — about 0.5 occurrences485–483 Mya — about 1 occurrence483–482 Mya — about 2 occurrences482–480 Mya — about 0.5 occurrences480–479 Mya — about 0.5 occurrences479–477 Mya — about 0.5 occurrences477–476 Mya — about 0.9 occurrences476–474 Mya — about 2 occurrences474–472 Mya — about 2 occurrences472–471 Mya — about 2 occurrences471–469 Mya — about 2 occurrences469–468 Mya — about 0.4 occurrences468–466 Mya — about 0.2 occurrences466–464 Mya — about 0.2 occurrences464–463 Mya — about 0.2 occurrences463–461 Mya — about 0.2 occurrences461–460 Mya — about 0.3 occurrences460–458 Mya — about 2 occurrences458–456 Mya — about 7 occurrences456–455 Mya — about 5 occurrences455–453 Mya — about 6 occurrences453–452 Mya — about 5 occurrences452–450 Mya — about 2 occurrences450–449 Mya — about 11 occurrences449–447 Mya — about 14 occurrences447–445 Mya — about 14 occurrences445–444 Mya — about 2 occurrences444–442 Mya — about 0.3 occurrences482.9 Mya445.2 Mya489.8 Mya442.2 Mya

83 occurrences of Arthrorhachis 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

83 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

39 formations

Jonstorp — 58.23°N, 15.73°EJonstorp — 58.22°N, 13.82°EJonstorp — 58.00°N, 13.00°EJonstorp — 58.61°N, 13.42°EJonstorp — 58.53°N, 14.98°EJonstorp — 60.91°N, 15.02°EJonstorp — 60.07°N, 15.18°EBalclatchie — 55.24°N, 4.78°WBalclatchie — 54.84°N, 4.05°WBalclatchie — 55.17°N, 4.87°WBalclatchie — 55.31°N, 4.80°WDomusnovas — 40.34°N, 8.69°EDomusnovas — 39.44°N, 8.42°EDomusnovas — 39.33°N, 8.67°EDomusnovas — 39.24°N, 8.49°EJerrestad — 55.71°N, 13.28°EJerrestad — 55.43°N, 13.30°EJerrestad — 55.53°N, 14.27°ETøyen — 59.72°N, 9.85°ETøyen — 59.73°N, 9.87°ETøyen — 59.92°N, 10.78°ETangtou — 32.07°N, 119.26°ETangtou — 32.00°N, 119.00°EJerrestad — 55.06°N, 14.89°EJerrestad — 55.09°N, 15.04°EJerrestad — 55.04°N, 14.84°EEdinburg — 37.74°N, 79.51°WArdwell Farm — 55.25°N, 4.85°WArdwell Farm — 55.22°N, 4.77°WRoad River — 62.83°N, 136.58°WRoad River — 64.50°N, 130.00°WPontyfenni — 52.00°N, 5.00°WKraluv Dvur — 50.00°N, 14.00°EValhallfonna — 79.80°N, 17.76°EUlunda Mudstone — 58.24°N, 13.73°EUlunda Mudstone — 58.00°N, 13.00°EDoularg — 55.20°N, 4.74°WFosses — 50.34°N, 5.08°ELantz Mills — 38.53°N, 78.60°WLiberty Hall — 38.53°N, 78.60°WZalesia — 50.77°N, 21.45°EBjorkasholmen — 59.14°N, 11.18°ECrugan Mudstone — 53.00°N, 4.00°WDwyfor Mudstone — 53.00°N, 4.00°WRhiwlas Limestone — 53.00°N, 3.00°WBaota — 27.00°N, 101.00°E

Loading coastlines…

The named rock units Arthrorhachis has been recovered from, largest first. Drawn where the rock is now, not where it formed. 15 further formations hold fewer occurrences each and are not listed. 4 occurrences have no formation on record, which is common for older literature.

Arthrorhachis and its relatives

Ordovician

Where Arthrorhachis and its relatives were recorded in the Ordovician.

Found in the same rock

566 taxa

The Paleobiology Database records 83 sites for Arthrorhachis, 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

34 references

Each of the 83 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. 22 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 content0

No picture of Arthrorhachis was found. Wikidata and iDigBio were searched and had none.

Wikipedia has a picture filed under this name, but nothing tied it to Arthrorhachis itself, so it was not used.

Smithsonian Open Access did not answer, so this is what the others held rather than everything there is.

GBIF was asked, and what came back is not recorded: nothing, or a picture this site could not tie to Arthrorhachis, or no answer at all. This entry cannot say which.

No 3D scan of Arthrorhachis 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.

This is what the site found, which is not the same as what exists.

Keep going

What may have been alongside itMetagnostidae through timeFormations of the OrdovicianThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. Hawle and Corda 1847