Arthricocephalus

Arthricocephalus 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 Arthricocephalus was found. Wikipedia, Wikidata, iDigBio and Smithsonian Open Access were searched and had none. GBIF was asked, and what came back is not recorded: nothing, or a picture this site could not tie to Arthricocephalus, or no answer at all. This entry cannot say which.

On record

Recorded, not inferred
Sits inside
OryctocephalidaePBDB
Diet
carnivorePBDB, for Corynexochida
Life habit
nektobenthicPBDB, for Corynexochida
Motility
actively mobilePBDB, for Corynexochida
Vision
well-developedPBDB, for Oryctocephalidae
Environment
marinePBDB, for Trilobita

Time the record covers

At most 17 million years on record.

Every occurrence read is dated to somewhere between 521 Mya and 504.5 Mya, and nothing in the dating separates them, so that window is what the record shows rather than a span.

Cambrian — about 16 of 16 occurrencesCambrian522–521 Mya — about 0.0 occurrences521–520 Mya — about 0.1 occurrences520–520 Mya — about 0.1 occurrences520–519 Mya — about 0.1 occurrences519–519 Mya — about 0.1 occurrences519–518 Mya — about 0.1 occurrences518–517 Mya — about 0.1 occurrences517–517 Mya — about 0.1 occurrences517–516 Mya — about 0.1 occurrences516–516 Mya — about 0.1 occurrences516–515 Mya — about 0.1 occurrences515–515 Mya — about 0.1 occurrences515–514 Mya — about 1.0 occurrences514–513 Mya — about 1.0 occurrences513–513 Mya — about 1.0 occurrences513–512 Mya — about 1.0 occurrences512–512 Mya — about 1.0 occurrences512–511 Mya — about 1.0 occurrences511–510 Mya — about 1.0 occurrences510–510 Mya — about 1.0 occurrences510–509 Mya — about 1.0 occurrences509–509 Mya — about 1.0 occurrences509–508 Mya — about 1 occurrence508–508 Mya — about 1 occurrence508–507 Mya — about 1 occurrence507–506 Mya — about 0.9 occurrences506–506 Mya — about 0.2 occurrences506–505 Mya — about 0.2 occurrences505–505 Mya — about 0.2 occurrences505–504 Mya — about 0.0 occurrences521.5 Mya504 Mya

16 occurrences of Arthricocephalus 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

16 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

Balang — 26.65°N, 107.95°EBalang — 28.37°N, 109.34°EBalang — 26.39°N, 107.69°EBalang — 26.24°N, 107.62°EBalang — 28.42°N, 109.42°EDachenling — 28.82°N, 118.60°EDachenling — 28.73°N, 118.62°EKuonamka — 69.66°N, 124.18°E

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The named rock units Arthricocephalus has been recovered from, largest first. Drawn where the rock is now, not where it formed. 2 occurrences have no formation on record, which is common for older literature.

Arthricocephalus and its relatives

Cambrian

Where Arthricocephalus and its relatives were recorded in the Cambrian.

Found in the same rock

152 taxa

The Paleobiology Database records 6 sites for Arthricocephalus, 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

9 references

Each of the 16 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 Arthricocephalus was found. Wikipedia, Wikidata, iDigBio and Smithsonian Open Access were searched and had none.

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

No 3D scan was found. Smithsonian Open Access, MorphoSource and Sketchfab were all searched.

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 itOryctocephalidae through timeFormations of the CambrianThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. Bergeron 1899