Yorkella

Yorkella is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the later part of the Botomian stage, which lasted from approximately 524 to 518.5 million years ago. This faunal stage was part of the Cambrian Period.

No picture of Yorkella 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 Yorkella, or no answer at all. This entry cannot say which.

On record

Recorded, not inferred
Sits inside
RedlichiidaePBDB
Diet
deposit feederPBDB, for Redlichiidae
Life habit
nektobenthicPBDB, for Redlichiidae
Motility
actively mobilePBDB, for Redlichiidae
Vision
well-developedPBDB, for Redlichiidae
Environment
marinePBDB, for Trilobita

Time the record covers

At most 8.9 million years on record.

Every occurrence read is dated to somewhere between 521 Mya and 512.1 Mya, and nothing in the dating separates them, so that window is what the record shows rather than a span.

Cambrian — about 8 of 8 occurrencesCambrian521–521 Mya — about 0.1 occurrences521–521 Mya — about 0.1 occurrences521–520 Mya — about 0.1 occurrences520–520 Mya — about 0.1 occurrences520–520 Mya — about 0.1 occurrences520–519 Mya — about 0.1 occurrences519–519 Mya — about 0.1 occurrences519–519 Mya — about 0.1 occurrences519–518 Mya — about 0.1 occurrences518–518 Mya — about 0.1 occurrences518–518 Mya — about 0.1 occurrences518–517 Mya — about 0.1 occurrences517–517 Mya — about 0.1 occurrences517–517 Mya — about 0.1 occurrences517–516 Mya — about 0.1 occurrences516–516 Mya — about 0.3 occurrences516–516 Mya — about 0.5 occurrences516–515 Mya — about 0.5 occurrences515–515 Mya — about 0.5 occurrences515–515 Mya — about 0.5 occurrences515–514 Mya — about 0.5 occurrences514–514 Mya — about 0.5 occurrences514–514 Mya — about 0.5 occurrences514–513 Mya — about 0.5 occurrences513–513 Mya — about 0.5 occurrences513–513 Mya — about 0.5 occurrences513–512 Mya — about 0.5 occurrences512–512 Mya — about 0.2 occurrences521.5 Mya511.6 Mya

8 occurrences of Yorkella on record, most of them in the Cambrian. 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

8 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

4 formations

Mernmerna — 31.19°S, 138.87°EParara Limestone — 34.92°S, 137.80°EKulpara Limestone — 34.92°S, 137.80°EParara — 34.06°S, 138.02°E

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The named rock units Yorkella 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.

Yorkella and its relatives

Cambrian

Where Yorkella and its relatives were recorded in the Cambrian.

Found in the same rock

81 taxa

The Paleobiology Database records 8 sites for Yorkella, 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

3 references

Each of the 8 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 Yorkella 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 Yorkella, or no answer at all. This entry cannot say which.

No 3D scan of Yorkella 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 itRedlichiidae through timeFormations of the CambrianThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. Kobayashi 1942