Oncagnostus

Oncagnostus is a genus of trilobite in the order Agnostida, which existed in what is now Shandong, China. It was described by Whitehouse in 1936, and the type species is Oncagnostus hoi, which was originally described as a species of Agnostus by Sun in 1924.

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

On record

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

Time the record covers

At least 4 million years on record.

The record covers at least 494.2 Mya to 490.2 Mya. No occurrence read is dated outside 497 Mya to 486.85 Mya.

Cambrian — about 20 of 20 occurrencesCambrianOrdovician — about 0 of 20 occurrences497–497 Mya — about 0.7 occurrences497–496 Mya — about 1 occurrence496–496 Mya — about 1 occurrence496–496 Mya — about 1 occurrence496–495 Mya — about 1 occurrence495–495 Mya — about 1 occurrence495–495 Mya — about 1 occurrence495–494 Mya — about 1 occurrence494–494 Mya — about 1 occurrence494–493 Mya — about 1 occurrence493–493 Mya — about 1 occurrence493–493 Mya — about 0.8 occurrences493–492 Mya — about 0.4 occurrences492–492 Mya — about 0.4 occurrences492–492 Mya — about 0.4 occurrences492–491 Mya — about 0.4 occurrences491–491 Mya — about 0.3 occurrences491–490 Mya — about 0.3 occurrences490–490 Mya — about 0.4 occurrences490–490 Mya — about 0.6 occurrences490–489 Mya — about 0.6 occurrences489–489 Mya — about 0.6 occurrences489–489 Mya — about 0.6 occurrences489–488 Mya — about 0.6 occurrences488–488 Mya — about 0.6 occurrences488–487 Mya — about 0.6 occurrences487–487 Mya — about 0.6 occurrences487–487 Mya — about 0.4 occurrences494.2 Mya490.2 Mya497.5 Mya486.4 Mya

20 occurrences of Oncagnostus 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

20 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

Zhumabai — 43.53°N, 69.95°EDavis — 37.77°N, 90.52°WDavis — 37.97°N, 90.03°WRabbitkettle — 64.59°N, 130.01°WJones Ridge Limestone — 65.08°N, 141.10°WCerro Pelado — 32.89°S, 69.16°WChangshan — 35.93°N, 117.08°ENopah — 36.46°N, 116.76°WKalladeina — 27.20°S, 140.11°EReagan Sandstone — 34.82°N, 98.41°W

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

Oncagnostus and its relatives

Cambrian

Where Oncagnostus and its relatives were recorded in the Cambrian.

Found in the same rock

50 taxa

The Paleobiology Database records 12 sites for Oncagnostus, 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 20 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 Oncagnostus 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 Oncagnostus, or no answer at all. This entry cannot say which.

No 3D scan of Oncagnostus 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 itAgnostidae through timeFormations of the CambrianThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. Whitehouse 1936