Compacoleus

Arctonoe fragilis (Baird, 1863), a relative of Compacoleus — not Compacoleus itself

Not Compacoleus. This is Arctonoe fragilis (Baird, 1863), a relative.

Collier Sparks · CC BY-NC 4.0 · via GBIF. 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
PlumulitidaePBDB
Diet
grazerPBDB, for Machaeridia
Life habit
epifaunalPBDB, for Machaeridia
Motility
actively mobilePBDB, for Machaeridia
Vision
limitedPBDB, for Polychaeta

Time the record covers

At most 11 million years on record.

Every occurrence read is dated to somewhere between 443.1 Mya and 432.9 Mya, and nothing in the dating separates them, so that window is what the record shows rather than a span.

Ordovician — about 0 of 2 occurrencesSilurian — about 2 of 2 occurrencesSilurian443–443 Mya — about 0.0 occurrences443–442 Mya — about 0.0 occurrences442–442 Mya — about 0.0 occurrences442–442 Mya — about 0.0 occurrences442–441 Mya — about 0.0 occurrences441–441 Mya — about 0.0 occurrences441–441 Mya — about 0.0 occurrences441–440 Mya — about 0.0 occurrences440–440 Mya — about 0.0 occurrences440–439 Mya — about 0.0 occurrences439–439 Mya — about 0.0 occurrences439–439 Mya — about 0.0 occurrences439–438 Mya — about 0.1 occurrences438–438 Mya — about 0.1 occurrences438–438 Mya — about 0.1 occurrences438–437 Mya — about 0.1 occurrences437–437 Mya — about 0.1 occurrences437–437 Mya — about 0.1 occurrences437–436 Mya — about 0.1 occurrences436–436 Mya — about 0.1 occurrences436–435 Mya — about 0.1 occurrences435–435 Mya — about 0.1 occurrences435–435 Mya — about 0.1 occurrences435–434 Mya — about 0.1 occurrences434–434 Mya — about 0.1 occurrences434–434 Mya — about 0.1 occurrences434–433 Mya — about 0.1 occurrences433–433 Mya — about 0.1 occurrences443.6 Mya432.4 Mya

2 occurrences of Compacoleus 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

2 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

1 formation

Hughley Shales — 52.63°N, 2.52°W

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The named rock units Compacoleus 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.

Compacoleus and its relatives

Silurian

Where Compacoleus and its relatives were recorded in the Silurian.

Found in the same rock

12 taxa

The Paleobiology Database records 2 sites for Compacoleus, and this reads all of them. The number is how many of those sites it was catalogued from too.

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

2 references

Each of the 2 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. Each entry links to doi.org. Relayed as the Paleobiology Database holds them, not checked against what they resolve to.

Media and terms

Media content1

Picture of Arctonoe fragilis (Baird, 1863)

Source
GBIF
Credit
Collier Sparks
Licence
CC BY-NC 4.0
Commercial use
the licence does not allow it

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

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

Keep going

What may have been alongside itPlumulitidae through timeFormations of the SilurianThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0.