Poraspis

Poraspis is an extinct genus of heterostracan. Fossils are found in Late Silurian and Early Devonian marine strata of Norway, Canada and the United States.

Poraspis

Lycaon.cl · CC BY-SA 3.0 · 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
PoraspidinaePBDB
Motility
actively mobilePBDB, for Chordata

Time the record covers

At least 20 million years on record.

The record covers at least 419.62 Mya to 399.5 Mya. No occurrence read is dated outside 426.7 Mya to 387.95 Mya.

Silurian — about 2 of 33 occurrencesSilurianDevonian — about 31 of 33 occurrencesDevonian427–426 Mya — about 0.2 occurrences426–425 Mya — about 0.4 occurrences425–423 Mya — about 0.4 occurrences423–422 Mya — about 0.4 occurrences422–421 Mya — about 0.4 occurrences421–419 Mya — about 1 occurrence419–418 Mya — about 6 occurrences418–417 Mya — about 6 occurrences417–415 Mya — about 5 occurrences415–414 Mya — about 5 occurrences414–413 Mya — about 4 occurrences413–411 Mya — about 0.8 occurrences411–410 Mya — about 0.5 occurrences410–409 Mya — about 0.2 occurrences409–407 Mya — about 0.2 occurrences407–406 Mya — about 0.2 occurrences406–405 Mya — about 0.2 occurrences405–403 Mya — about 0.2 occurrences403–402 Mya — about 0.2 occurrences402–401 Mya — about 0.2 occurrences401–399 Mya — about 0.2 occurrences399–398 Mya — about 0.3 occurrences398–397 Mya — about 0.3 occurrences397–395 Mya — about 0.3 occurrences395–394 Mya — about 0.3 occurrences394–393 Mya — about 0.1 occurrences393–391 Mya — about 0.0 occurrences391–390 Mya — about 0.0 occurrences390–389 Mya — about 0.0 occurrences389–387 Mya — about 0.0 occurrences419.62 Mya399.5 Mya427.5 Mya387.2 Mya

33 occurrences of Poraspis on record, most of them in the Devonian. 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

33 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

14 formations

Fraenkelryggen — 79.83°N, 12.00°EFraenkelryggen — 79.67°N, 12.37°EBen Nevis — 79.63°N, 12.29°EDelorme — 62.55°N, 127.75°WDelorme — 63.42°N, 128.00°WDelorme — 63.23°N, 128.01°WPod''emnaya — 79.50°N, 96.00°EPeel Sound — 72.23°N, 96.55°WTyver — 48.98°N, 25.71°ETyver — 48.64°N, 25.73°EDniester — 48.86°N, 25.59°EDniester — 48.77°N, 25.61°ELievin — 50.42°N, 2.77°ESpokojnaya — 79.50°N, 96.00°ELost Burro — 36.30°N, 116.96°WPsammosteus Limestone — 52.53°N, 2.48°WOld Red Sandstone — 51.86°N, 2.73°WIvanie — 48.67°N, 25.76°EChortkiv/Ivanie — 49.26°N, 25.69°E

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The named rock units Poraspis 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.

Poraspis and its relatives

Devonian

Where Poraspis and its relatives were recorded in the Devonian.

Found in the same rock

205 taxa

The Paleobiology Database records 29 sites for Poraspis, 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

10 references

Each of the 33 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 Poraspis

Credit
Lycaon.cl
Licence
CC BY-SA 3.0
Commercial use
the licence allows it

No 3D scan of Poraspis 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.

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 itPoraspidinae through timeFormations of the DevonianThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. Kiaer 1932