Arandaspis

Arandaspis

Michal Maňas · Public Domain · via Wikidata/Commons. 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
ArandaspididaePBDB
Motility
actively mobilePBDB, for Chordata

Time the record covers

At most 19 million years on record.

Every occurrence read is dated to somewhere between 477.1 Mya and 458.2 Mya, and nothing in the dating separates them, so that window is what the record shows rather than a span.

Ordovician — about 4 of 4 occurrencesOrdovician478–477 Mya — about 0.0 occurrences477–476 Mya — about 0.1 occurrences476–476 Mya — about 0.1 occurrences476–475 Mya — about 0.1 occurrences475–474 Mya — about 0.1 occurrences474–474 Mya — about 0.1 occurrences474–473 Mya — about 0.1 occurrences473–472 Mya — about 0.1 occurrences472–472 Mya — about 0.1 occurrences472–471 Mya — about 0.1 occurrences471–470 Mya — about 0.1 occurrences470–470 Mya — about 0.1 occurrences470–469 Mya — about 0.1 occurrences469–468 Mya — about 0.1 occurrences468–468 Mya — about 0.1 occurrences468–467 Mya — about 0.1 occurrences467–466 Mya — about 0.1 occurrences466–466 Mya — about 0.1 occurrences466–465 Mya — about 0.1 occurrences465–464 Mya — about 0.1 occurrences464–464 Mya — about 0.1 occurrences464–463 Mya — about 0.1 occurrences463–462 Mya — about 0.1 occurrences462–462 Mya — about 0.1 occurrences462–461 Mya — about 0.1 occurrences461–460 Mya — about 0.1 occurrences460–460 Mya — about 0.1 occurrences460–459 Mya — about 0.1 occurrences459–458 Mya — about 0.1 occurrences458–458 Mya — about 0.0 occurrences477.6 Mya457.7 Mya

4 occurrences of Arandaspis 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

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

2 formations

Stairway Sandstone — 25.50°S, 134.00°EStairway Sandstone — 24.72°S, 134.02°EStairway Sandstone — 24.02°S, 133.42°ERowena — 31.15°S, 142.38°E

Loading coastlines…

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

Arandaspis and its relatives

Ordovician

Where Arandaspis and its relatives were recorded in the Ordovician.

Found in the same rock

5 taxa

The Paleobiology Database records 4 sites for Arandaspis, and this reads all of them. The number is how many of those sites it was catalogued from too.

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

3 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. Each entry links to doi.org. Relayed as the Paleobiology Database holds them, not checked against what they resolve to.

Media and terms

Media content2

Picture of Arandaspis

Credit
Michal Maňas
Licence
Public Domain
Commercial use
the licence allows it

3D model

Source
Sketchfab
Licence
CC Attribution
Commercial use
cannot be read from the licence given — check the record

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

Keep going

What may have been alongside itArandaspididae through timeFormations of the OrdovicianThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. Ritchie and Gilbert-Tomlinson 1977