Hadragnostus

Searched as Hadragnostus helixensis. The Paleobiology Database treats Hadragnostus as the accepted name.

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

On record

Recorded, not inferred
Sits inside
AmmagnostidaePBDB
Diet
detritivorePBDB, for Agnostida
Life habit
epifaunalPBDB, for Agnostida
Motility
slow-movingPBDB, for Agnostida

Time the record covers

At most 2 million years on record.

Every occurrence read is dated to somewhere between 499 Mya and 497 Mya, and nothing in the dating separates them, so that window is what the record shows rather than a span.

Cambrian — about 5 of 5 occurrencesCambrian499–499 Mya — about 0.3 occurrences499–499 Mya — about 0.3 occurrences499–499 Mya — about 0.3 occurrences499–499 Mya — about 0.3 occurrences499–499 Mya — about 0.3 occurrences499–498 Mya — about 0.3 occurrences498–498 Mya — about 0.3 occurrences498–498 Mya — about 0.3 occurrences498–498 Mya — about 0.3 occurrences498–498 Mya — about 0.3 occurrences498–498 Mya — about 0.3 occurrences498–498 Mya — about 0.3 occurrences498–498 Mya — about 0.3 occurrences498–498 Mya — about 0.3 occurrences498–498 Mya — about 0.3 occurrences498–497 Mya — about 0.3 occurrences497–497 Mya — about 0.3 occurrences497–497 Mya — about 0.3 occurrences497–497 Mya — about 0.3 occurrences497–497 Mya — about 0.3 occurrences499.5 Mya496.5 Mya

5 occurrences of Hadragnostus 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

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

Goyder — 23.61°S, 134.49°EShannon — 23.61°S, 134.49°E

Loading coastlines…

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

Hadragnostus and its relatives

Cambrian

Where Hadragnostus and its relatives were recorded in the Cambrian.

Found in the same rock

128 taxa

The Paleobiology Database records 19 sites for Hadragnostus, 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 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. Each entry links to doi.org. Relayed as the Paleobiology Database holds them, not checked against what they resolve to.

Media and terms

Media content0

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

No 3D scan of Hadragnostus 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 itAmmagnostidae through timeFormations of the CambrianThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. Opik 1967