Onchus

Onchus

Agassiz, 1837 · CC BY-SA 4.0 · via Wikidata/Commons. May be a photograph of a specimen, or an artist’s reconstruction — an interpretation of a skeleton, since colour and soft tissue are almost never preserved.

On record

Recorded, not inferred
Sits inside
OnchidaePBDB
Diet
carnivorePBDB, for Acanthodii
Life habit
nektonicPBDB, for Acanthodii
Motility
actively mobilePBDB, for Acanthodii

Time the record covers

At least 155 million years on record.

The record covers at least 422.7 Mya to 266.9 Mya. No occurrence read is dated outside 425 Mya to 259.857 Mya.

Silurian — about 12 of 23 occurrencesDevonian — about 10 of 23 occurrencesDevonianCarboniferous — about 0 of 23 occurrencesPermian — about 1 of 23 occurrencesPermian428–423 Mya — about 2 occurrences423–417 Mya — about 12 occurrences417–411 Mya — about 4 occurrences411–405 Mya — about 1 occurrence405–400 Mya — about 1.0 occurrences400–394 Mya — about 1.0 occurrences394–388 Mya — about 1 occurrence388–383 Mya — about 0.1 occurrences268–262 Mya — about 0.7 occurrences262–257 Mya — about 0.3 occurrences422.7 Mya266.9 Mya428 Mya257 Mya

23 occurrences of Onchus on record, most of them in the Silurian. 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

23 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

14 formations

Catavi — 18.45°S, 64.80°WAigu — 59.07°N, 24.79°EOverton — 52.48°N, 2.63°WLoo Beds — 59.07°N, 24.79°EKnoydart — 45.62°N, 61.97°WBeartooth Butte — 44.95°N, 109.62°WHolland Quarry Shale — 41.67°N, 83.55°WPozary — 49.93°N, 14.18°EBen Nevis — 79.63°N, 12.29°ETemeside Shale — 52.37°N, 2.73°WWhitcliffe — 51.58°N, 1.87°WRaglan Marl — 51.71°N, 2.51°WDownton — 52.21°N, 3.04°WKush Yeilagh — 36.85°N, 55.35°E

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The named rock units Onchus has been recovered from, largest first. Drawn where the rock is now, not where it formed. 6 occurrences have no formation on record, which is common for older literature.

Onchus and its relatives

Silurian

Where Onchus and its relatives were recorded in the Silurian.

Found in the same rock

252 taxa

The Paleobiology Database records 17 sites for Onchus, 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

11 references

Each of the 23 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 content1

Picture of Onchus

Credit
Agassiz, 1837
Licence
CC BY-SA 4.0
Commercial use
the licence allows it

No 3D scan of Onchus was found in Sketchfab.

Smithsonian Open Access and MorphoSource were 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 itOnchidae through timeFormations of the SilurianThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. Agassiz 1837