Tremataspis

Tremataspis is a genus of an extinct osteostracan agnathan from the Silurian period of what is now Estonia.

Tremataspis

Tommy from Arad · CC BY 2.0 · via Wikipedia/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
TremataspididaePBDB
Motility
actively mobilePBDB, for Chordata

Time the record covers

At most 7.9 million years on record.

Every occurrence read is dated to somewhere between 430.6 Mya and 422.7 Mya, and nothing in the dating separates them, so that window is what the record shows rather than a span.

Silurian — about 25 of 25 occurrencesSilurian431–431 Mya — about 0.1 occurrences431–430 Mya — about 0.5 occurrences430–430 Mya — about 0.5 occurrences430–430 Mya — about 0.5 occurrences430–429 Mya — about 0.5 occurrences429–429 Mya — about 0.5 occurrences429–429 Mya — about 0.5 occurrences429–428 Mya — about 1 occurrence428–428 Mya — about 2 occurrences428–428 Mya — about 2 occurrences428–428 Mya — about 2 occurrences428–427 Mya — about 2 occurrences427–427 Mya — about 2 occurrences427–427 Mya — about 1 occurrence427–426 Mya — about 1.0 occurrences426–426 Mya — about 1.0 occurrences426–426 Mya — about 1.0 occurrences426–425 Mya — about 1.0 occurrences425–425 Mya — about 1.0 occurrences425–425 Mya — about 1.0 occurrences425–425 Mya — about 1.0 occurrences425–424 Mya — about 1.0 occurrences424–424 Mya — about 1.0 occurrences424–424 Mya — about 1.0 occurrences424–423 Mya — about 1.0 occurrences423–423 Mya — about 1.0 occurrences423–423 Mya — about 0.3 occurrences423–422 Mya — about 0.0 occurrences431.1 Mya422.2 Mya

25 occurrences of Tremataspis 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

25 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

5 formations

Himmiste — 59.07°N, 24.79°EHimmiste — 58.27°N, 21.96°EHalla — 57.61°N, 18.80°EViita Beds — 59.07°N, 24.79°EVesiku Beds — 59.07°N, 24.79°EVelikoretskaya — 67.59°N, 49.12°E

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The named rock units Tremataspis has been recovered from, largest first. Drawn where the rock is now, not where it formed. 3 occurrences have no formation on record, which is common for older literature.

Tremataspis and its relatives

Silurian

Where Tremataspis and its relatives were recorded in the Silurian.

Found in the same rock

52 taxa

The Paleobiology Database records 10 sites for Tremataspis, 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

5 references

Each of the 25 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 Tremataspis

Credit
Tommy from Arad
Licence
CC BY 2.0
Commercial use
the licence allows it

No 3D scan of Tremataspis 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.

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 itTremataspididae through timeFormations of the SilurianThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. Schmidt 1866