Holdenia

No picture of Holdenia was found. Wikipedia and iDigBio were searched and had none. Wikidata and 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 Holdenia, or no answer at all. This entry cannot say which.

On record

Recorded, not inferred
Sits inside
IsocolidaePBDB
Diet
carnivorePBDB, for Trilobita
Life habit
low-level epifaunalPBDB, for Trilobita
Motility
fast-movingPBDB, for Trilobita
Vision
blindPBDB, for Isocolidae
Environment
marinePBDB, for Trilobita

Time the record covers

At least 3.3 million years on record.

The record covers at least 452.8 Mya to 449.5 Mya. No occurrence read is dated outside 458.2 Mya to 443.1 Mya.

Ordovician — about 5 of 5 occurrencesOrdovicianSilurian — about 0 of 5 occurrences459–458 Mya — about 0.0 occurrences458–458 Mya — about 0.1 occurrences458–457 Mya — about 0.2 occurrences457–457 Mya — about 0.2 occurrences457–456 Mya — about 0.2 occurrences456–455 Mya — about 0.2 occurrences455–455 Mya — about 0.2 occurrences455–454 Mya — about 0.2 occurrences454–454 Mya — about 0.2 occurrences454–453 Mya — about 0.2 occurrences453–453 Mya — about 0.2 occurrences453–452 Mya — about 0.1 occurrences452–452 Mya — about 0.1 occurrences452–451 Mya — about 0.1 occurrences451–451 Mya — about 0.1 occurrences451–450 Mya — about 0.1 occurrences450–450 Mya — about 0.2 occurrences450–449 Mya — about 0.2 occurrences449–449 Mya — about 0.2 occurrences449–448 Mya — about 0.2 occurrences448–447 Mya — about 0.2 occurrences447–447 Mya — about 0.2 occurrences447–446 Mya — about 0.2 occurrences446–446 Mya — about 0.2 occurrences446–445 Mya — about 0.2 occurrences445–445 Mya — about 0.1 occurrences445–444 Mya — about 0.1 occurrences444–444 Mya — about 0.1 occurrences444–443 Mya — about 0.1 occurrences443–443 Mya — about 0.0 occurrences452.8 Mya449.5 Mya458.7 Mya442.6 Mya

5 occurrences of Holdenia 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

5 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

2 formations

Edinburg — 36.93°N, 81.70°WEdinburg — 36.96°N, 81.77°WCystoid Limestone — 41.00°N, 1.00°WCystoid Limestone — 41.15°N, 1.18°W

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

Holdenia and its relatives

Ordovician

Where Holdenia and its relatives were recorded in the Ordovician.

Found in the same rock

129 taxa

The Paleobiology Database records 5 sites for Holdenia, 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

4 references

Each of the 5 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 Holdenia was found. Wikipedia and iDigBio were searched and had none.

Wikidata and 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 Holdenia, or no answer at all. This entry cannot say which.

No 3D scan of Holdenia 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 itIsocolidae through timeFormations of the OrdovicianThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. Cooper 1953