Eleutherocentrus

Eleutherocentrus is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the later part of the Arenig stage of the Ordovician Period, approximately 478 to 471 million years ago.

No picture of Eleutherocentrus was found. Wikipedia, Wikidata and iDigBio were searched and had none. 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 Eleutherocentrus, or no answer at all. This entry cannot say which.

On record

Recorded, not inferred
Sits inside
BathyuridaePBDB
Diet
deposit feederPBDB, for Proetida
Life habit
low-level epifaunalPBDB, for Trilobita
Motility
fast-movingPBDB, for Trilobita
Vision
well-developedPBDB, for Bathyuridae
Environment
marinePBDB, for Trilobita

Time the record covers

At most 18 million years on record.

Every occurrence read is dated to somewhere between 475.3 Mya and 457.3 Mya, and nothing in the dating separates them, so that window is what the record shows rather than a span.

Ordovician — about 22 of 22 occurrencesOrdovician476–475 Mya — about 0.0 occurrences475–475 Mya — about 0.2 occurrences475–474 Mya — about 0.2 occurrences474–473 Mya — about 0.2 occurrences473–473 Mya — about 0.2 occurrences473–472 Mya — about 0.2 occurrences472–471 Mya — about 0.2 occurrences471–471 Mya — about 4 occurrences471–470 Mya — about 4 occurrences470–469 Mya — about 3 occurrences469–469 Mya — about 0.8 occurrences469–468 Mya — about 0.5 occurrences468–468 Mya — about 0.5 occurrences468–467 Mya — about 0.5 occurrences467–466 Mya — about 0.5 occurrences466–466 Mya — about 0.5 occurrences466–465 Mya — about 0.5 occurrences465–464 Mya — about 0.5 occurrences464–464 Mya — about 0.5 occurrences464–463 Mya — about 0.5 occurrences463–463 Mya — about 0.5 occurrences463–462 Mya — about 0.5 occurrences462–461 Mya — about 0.5 occurrences461–461 Mya — about 0.5 occurrences461–460 Mya — about 0.5 occurrences460–459 Mya — about 0.5 occurrences459–459 Mya — about 0.5 occurrences459–458 Mya — about 0.5 occurrences458–457 Mya — about 0.5 occurrences457–457 Mya — about 0.1 occurrences475.8 Mya456.8 Mya

22 occurrences of Eleutherocentrus 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

22 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

Swan Peak — 40.16°N, 110.40°WSwan Peak — 41.97°N, 111.47°WSwan Peak — 41.92°N, 112.15°WSwan Peak — 41.77°N, 111.77°WSwan Peak — 41.52°N, 111.94°WSwan Peak — 41.74°N, 111.83°WSwan Peak — 40.89°N, 112.82°WSwan Peak — 41.55°N, 111.96°WKanosh Shale — 38.60°N, 113.75°WKanosh Shale — 38.85°N, 113.46°WKanosh Shale — 38.87°N, 113.42°WJuab Limestone — 38.85°N, 113.46°WJuab Limestone — 39.17°N, 112.17°WGarden City — 40.16°N, 110.40°WKanosh Shale? — 38.47°N, 113.27°W

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

Eleutherocentrus and its relatives

Ordovician

Where Eleutherocentrus and its relatives were recorded in the Ordovician.

Found in the same rock

45 taxa

The Paleobiology Database records 22 sites for Eleutherocentrus, 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

6 references

Each of the 22 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 content0

No picture of Eleutherocentrus was found. Wikipedia, Wikidata and iDigBio were searched and had none.

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 Eleutherocentrus, or no answer at all. This entry cannot say which.

No 3D scan of Eleutherocentrus 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.

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 itBathyuridae through timeFormations of the OrdovicianThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. Clark 1935