Ariaspis

Ariaspis is an extinct genus of cyathaspidiform heterostracan agnathan. Fossils are found in marine strata of Canada and Europe from the late Silurian period until its extinction during the Early Devonian. A new species, A. arctata, was described by David K. Elliott and Sandra Swift in 2010.

Ariaspis

Canadian Museum of Nature · CC BY 4.0 · 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
AriaspididaePBDB
Motility
actively mobilePBDB, for Chordata

Time the record covers

At least 4 million years on record.

The record covers at least 426.7 Mya to 422.7 Mya. No occurrence read is dated outside 443.1 Mya to 419.62 Mya.

Ordovician — about 0 of 5 occurrencesSilurian — about 5 of 5 occurrencesSilurianDevonian — about 0 of 5 occurrences444–443 Mya — about 0.0 occurrences443–442 Mya — about 0.0 occurrences442–441 Mya — about 0.0 occurrences441–440 Mya — about 0.0 occurrences440–440 Mya — about 0.0 occurrences440–439 Mya — about 0.0 occurrences439–438 Mya — about 0.0 occurrences438–437 Mya — about 0.0 occurrences437–436 Mya — about 0.0 occurrences436–435 Mya — about 0.0 occurrences435–435 Mya — about 0.0 occurrences435–434 Mya — about 0.0 occurrences434–433 Mya — about 0.0 occurrences433–432 Mya — about 0.0 occurrences432–431 Mya — about 0.0 occurrences431–431 Mya — about 0.1 occurrences431–430 Mya — about 0.5 occurrences430–429 Mya — about 0.5 occurrences429–428 Mya — about 0.5 occurrences428–427 Mya — about 0.5 occurrences427–426 Mya — about 0.4 occurrences426–426 Mya — about 0.1 occurrences426–425 Mya — about 0.1 occurrences425–424 Mya — about 0.1 occurrences424–423 Mya — about 0.1 occurrences423–422 Mya — about 0.3 occurrences422–422 Mya — about 0.4 occurrences422–421 Mya — about 0.4 occurrences421–420 Mya — about 0.4 occurrences420–419 Mya — about 0.2 occurrences426.7 Mya422.7 Mya443.6 Mya419.1 Mya

5 occurrences of Ariaspis on record, most of them in the Silurian. 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

3 formations

Cape Phillips — 75.13°N, 95.00°WSomerset Island — 73.98°N, 95.23°WPeel Sound — 72.23°N, 96.55°W

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The named rock units Ariaspis has been recovered from, largest first. Drawn where the rock is now, not where it formed. 1 occurrence has no formation on record, which is common for older literature.

Ariaspis and its relatives

Silurian

Where Ariaspis and its relatives were recorded in the Silurian.

Found in the same rock

69 taxa

The Paleobiology Database records 4 sites for Ariaspis, 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 content1

Picture of Ariaspis

Source
GBIF
Credit
Canadian Museum of Nature
Licence
CC BY 4.0
Commercial use
the licence allows it

No 3D scan was found. Smithsonian Open Access, MorphoSource and Sketchfab were all searched.

The description on this site

Licence
CC BY-SA 4.0

This is what the site found, which is not the same as what exists.

Keep going

What may have been alongside itAriaspididae through timeFormations of the SilurianThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. Denison 1963