Holotrachelus

Agriopis marginaria (Fabricius), a relative of Holotrachelus — not Holotrachelus itself

Not Holotrachelus. This is Agriopis marginaria (Fabricius), a relative.

via GBIF · CC0 · 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
CheiruridaePBDB
Diet
carnivorePBDB, for Cheiruridae
Life habit
low-level epifaunalPBDB, for Trilobita
Motility
fast-movingPBDB, for Trilobita
Environment
marinePBDB, for Trilobita

Time the record covers

At least 3 million years on record.

The record covers at least 451.8 Mya to 448.8 Mya. No occurrence read is dated outside 453.9 Mya to 443.1 Mya.

Ordovician — about 20 of 20 occurrencesOrdovicianSilurian — about 0 of 20 occurrences454–454 Mya — about 0.1 occurrences454–453 Mya — about 0.2 occurrences453–453 Mya — about 0.2 occurrences453–452 Mya — about 0.4 occurrences452–452 Mya — about 0.4 occurrences452–452 Mya — about 0.3 occurrences452–451 Mya — about 0.2 occurrences451–451 Mya — about 0.2 occurrences451–450 Mya — about 0.3 occurrences450–450 Mya — about 0.3 occurrences450–450 Mya — about 0.3 occurrences450–449 Mya — about 0.5 occurrences449–449 Mya — about 0.7 occurrences449–449 Mya — about 1 occurrence449–448 Mya — about 2 occurrences448–448 Mya — about 2 occurrences448–447 Mya — about 2 occurrences447–447 Mya — about 2 occurrences447–447 Mya — about 2 occurrences447–446 Mya — about 2 occurrences446–446 Mya — about 2 occurrences446–445 Mya — about 2 occurrences445–445 Mya — about 0.8 occurrences445–445 Mya — about 0.4 occurrences445–444 Mya — about 0.4 occurrences444–444 Mya — about 0.4 occurrences444–443 Mya — about 0.4 occurrences443–443 Mya — about 0.3 occurrences451.8 Mya448.8 Mya454.4 Mya442.6 Mya

20 occurrences of Holotrachelus on record, most of them in the Ordovician. 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

8 formations

Boda Limestone — 60.97°N, 15.15°EBoda Limestone — 61.17°N, 14.71°EBoda Limestone — 61.05°N, 15.20°EBoda Limestone — 61.12°N, 15.16°EBoda Limestone — 60.97°N, 15.43°EKildare Limestone — 53.17°N, 6.75°WKildare Limestone — 53.20°N, 6.92°WPabos — 48.56°N, 64.35°WKeisley — 54.62°N, 2.45°WKullsberg Limestone — 61.07°N, 15.17°ESørbakken — 60.05°N, 10.18°EBønsnes — 60.07°N, 10.22°ELangåra — 59.85°N, 10.50°E

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

Holotrachelus and its relatives

Ordovician

Where Holotrachelus and its relatives were recorded in the Ordovician.

Found in the same rock

394 taxa

The Paleobiology Database records 20 sites for Holotrachelus, 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

5 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 content1

Picture of Agriopis marginaria (Fabricius)

Source
GBIF
Credit
via GBIF
Licence
CC0
Commercial use
the licence allows it

No 3D scan of Holotrachelus 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 itCheiruridae through timeFormations of the OrdovicianThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. Holm 1898