Birkeniida

No picture of Birkeniida was found. Wikidata and iDigBio were searched and had none. Wikipedia has a picture filed under this name, but nothing tied it to Birkeniida itself, so it was not used. 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 Birkeniida, or no answer at all. This entry cannot say which.

On record

Recorded, not inferred
Sits inside
AnaspidaPBDB
Motility
actively mobilePBDB, for Chordata

Time the record covers

At least 5.1 million years on record.

The record covers at least 426.7 Mya to 421.6 Mya. No occurrence read is dated outside 432.9 Mya to 419.62 Mya.

Silurian — about 4 of 4 occurrencesSilurianDevonian — about 0 of 4 occurrences433–432 Mya — about 0.1 occurrences432–432 Mya — about 0.1 occurrences432–431 Mya — about 0.1 occurrences431–431 Mya — about 0.1 occurrences431–431 Mya — about 0.1 occurrences431–430 Mya — about 0.2 occurrences430–430 Mya — about 0.2 occurrences430–429 Mya — about 0.2 occurrences429–429 Mya — about 0.2 occurrences429–428 Mya — about 0.2 occurrences428–428 Mya — about 0.2 occurrences428–427 Mya — about 0.2 occurrences427–427 Mya — about 0.2 occurrences427–426 Mya — about 0.1 occurrences426–426 Mya — about 0.1 occurrences426–425 Mya — about 0.1 occurrences425–425 Mya — about 0.1 occurrences425–424 Mya — about 0.1 occurrences424–424 Mya — about 0.1 occurrences424–423 Mya — about 0.1 occurrences423–423 Mya — about 0.1 occurrences422–422 Mya — about 0.1 occurrences422–421 Mya — about 0.2 occurrences421–421 Mya — about 0.2 occurrences421–420 Mya — about 0.2 occurrences420–420 Mya — about 0.2 occurrences426.7 Mya421.6 Mya433.4 Mya419.1 Mya

4 occurrences of Birkeniida on record, most of them in the Silurian. The Paleobiology Database records this as a living group, and the chart stops with its fossils rather than at the present. 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

4 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

3 formations

Cowie — 56.95°N, 2.20°WHimmiste — 58.27°N, 21.96°EOhesaare — 58.00°N, 22.02°E

Loading coastlines…

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

Birkeniida and its relatives

Silurian

Where Birkeniida and its relatives were recorded in the Silurian.

Found in the same rock

83 taxa

The Paleobiology Database records 4 sites for Birkeniida, 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 4 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 Birkeniida was found. Wikidata and iDigBio were searched and had none.

Wikipedia has a picture filed under this name, but nothing tied it to Birkeniida itself, so it was not used.

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 Birkeniida, or no answer at all. This entry cannot say which.

No 3D scan of Birkeniida 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 itAnaspida through timeFormations of the SilurianThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. Berg 1937