Sigmocheilus

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

On record

Recorded, not inferred
Sits inside
PterocephaliinaePBDB
Diet
carnivorePBDB, for Trilobita
Life habit
low-level epifaunalPBDB, for Trilobita
Motility
fast-movingPBDB, for Trilobita
Vision
well-developedPBDB, for Pterocephaliidae
Environment
marinePBDB, for Trilobita

Time the record covers

At most 11 million years on record.

Every occurrence read is dated to somewhere between 497 Mya and 486.85 Mya, and nothing in the dating separates them, so that window is what the record shows rather than a span.

Cambrian — about 30 of 30 occurrencesCambrianOrdovician — about 0 of 30 occurrences497–497 Mya — about 2 occurrences497–496 Mya — about 3 occurrences496–496 Mya — about 3 occurrences496–496 Mya — about 3 occurrences496–495 Mya — about 3 occurrences495–495 Mya — about 3 occurrences495–495 Mya — about 3 occurrences495–494 Mya — about 3 occurrences494–494 Mya — about 3 occurrences494–493 Mya — about 2 occurrences493–493 Mya — about 0.3 occurrences493–493 Mya — about 0.3 occurrences493–492 Mya — about 0.2 occurrences492–492 Mya — about 0.2 occurrences492–492 Mya — about 0.2 occurrences492–491 Mya — about 0.2 occurrences491–491 Mya — about 0.2 occurrences491–490 Mya — about 0.2 occurrences490–490 Mya — about 0.2 occurrences490–490 Mya — about 0.2 occurrences490–489 Mya — about 0.2 occurrences489–489 Mya — about 0.2 occurrences489–489 Mya — about 0.2 occurrences489–488 Mya — about 0.2 occurrences488–488 Mya — about 0.2 occurrences488–487 Mya — about 0.2 occurrences487–487 Mya — about 0.2 occurrences487–487 Mya — about 0.1 occurrences497.5 Mya486.4 Mya

30 occurrences of Sigmocheilus 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

30 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

9 formations

Dunderberg Shale — 39.97°N, 114.88°WNopah — 40.00°N, 115.00°WNopah — 39.00°N, 116.00°WNopah — 36.58°N, 117.10°WOrr — 36.17°N, 115.14°WJones Ridge Limestone — 65.08°N, 141.10°WWindfall — 37.15°N, 116.00°WCorset Spring Shale — 38.52°N, 114.97°WRabbitkettle — 62.70°N, 128.38°WDunderberg — 37.15°N, 116.00°WOrakta — 68.00°N, 88.00°E

Loading coastlines…

The named rock units Sigmocheilus 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.

Sigmocheilus and its relatives

Cambrian

Where Sigmocheilus and its relatives were recorded in the Cambrian.

Found in the same rock

81 taxa

The Paleobiology Database records 27 sites for Sigmocheilus, 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

7 references

Each of the 30 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 Sigmocheilus 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 Sigmocheilus, or no answer at all. This entry cannot say which.

No 3D scan of Sigmocheilus 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.

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

Keep going

What may have been alongside itPterocephaliinae through timeFormations of the CambrianThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. Palmer 1960