Holcacephalus

Searched as Holcacephalus tunda atypicala. The Paleobiology Database treats Holcacephalus as the accepted name.

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

On record

Recorded, not inferred
Sits inside
NorwoodiidaePBDB
Diet
suspension feederPBDB, for Norwoodiidae
Life habit
low-level epifaunalPBDB, for Trilobita
Motility
fast-movingPBDB, for Trilobita
Vision
well-developedPBDB, for Norwoodiidae
Environment
marinePBDB, for Trilobita

Time the record covers

At most 11 million years on record.

The one occurrence read is dated to somewhere between 497 Mya and 486.85 Mya, which is a dating window rather than a span.

Cambrian — about 1 of 1 occurrenceCambrianOrdovician — about 0 of 1 occurrence497–497 Mya — about 0.0 occurrences497–496 Mya — about 0.0 occurrences496–496 Mya — about 0.0 occurrences496–496 Mya — about 0.0 occurrences496–495 Mya — about 0.0 occurrences495–495 Mya — about 0.0 occurrences495–495 Mya — about 0.0 occurrences495–494 Mya — about 0.0 occurrences494–494 Mya — about 0.0 occurrences494–493 Mya — about 0.0 occurrences493–493 Mya — about 0.0 occurrences493–493 Mya — about 0.0 occurrences493–492 Mya — about 0.0 occurrences492–492 Mya — about 0.0 occurrences492–492 Mya — about 0.0 occurrences492–491 Mya — about 0.0 occurrences491–491 Mya — about 0.0 occurrences491–490 Mya — about 0.0 occurrences490–490 Mya — about 0.0 occurrences490–490 Mya — about 0.0 occurrences490–489 Mya — about 0.0 occurrences489–489 Mya — about 0.0 occurrences489–489 Mya — about 0.0 occurrences489–488 Mya — about 0.0 occurrences488–488 Mya — about 0.0 occurrences488–487 Mya — about 0.0 occurrences487–487 Mya — about 0.0 occurrences487–487 Mya — about 0.0 occurrences497.5 Mya486.4 Mya

1 occurrence of Holcacephalus 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

1 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

Warrior — 40.83°N, 77.93°W

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

Holcacephalus and its relatives

Cambrian

Where Holcacephalus and its relatives were recorded in the Cambrian.

Found in the same rock

38 taxa

The Paleobiology Database records 4 sites for Holcacephalus, 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

1 reference

Each of the 1 occurrence 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 the Paleobiology Database's own record for the work.

Media and terms

Media content0

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

No 3D scan of Holcacephalus 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 itNorwoodiidae through timeFormations of the CambrianThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. Resser 1938