Tretaspis

Tretaspis

via iDigBio · CC BY · via iDigBio. 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
TrinucleinaePBDB
Diet
suspension feederPBDB, for Trinucleidae
Life habit
low-level epifaunalPBDB, for Trilobita
Motility
fast-movingPBDB, for Trilobita
Vision
limitedPBDB
Environment
marinePBDB, for Trilobita

Time the record covers

At least 12 million years on record.

The record covers at least 457.2 Mya to 445.2 Mya. No occurrence read is dated outside 458.2 Mya to 432.9 Mya.

Ordovician — about 209 of 210 occurrencesOrdovicianSilurian — about 1 of 210 occurrencesSilurian459–458 Mya — about 3 occurrences458–457 Mya — about 7 occurrences457–456 Mya — about 5 occurrences456–455 Mya — about 4 occurrences455–454 Mya — about 3 occurrences454–453 Mya — about 4 occurrences453–453 Mya — about 6 occurrences453–452 Mya — about 9 occurrences452–451 Mya — about 9 occurrences451–450 Mya — about 14 occurrences450–449 Mya — about 58 occurrences449–448 Mya — about 23 occurrences448–447 Mya — about 16 occurrences447–446 Mya — about 16 occurrences446–446 Mya — about 16 occurrences446–445 Mya — about 9 occurrences445–444 Mya — about 4 occurrences444–443 Mya — about 3 occurrences443–442 Mya — about 0.1 occurrences442–441 Mya — about 0.1 occurrences441–440 Mya — about 0.1 occurrences440–439 Mya — about 0.1 occurrences439–439 Mya — about 0.1 occurrences439–438 Mya — about 0.1 occurrences438–437 Mya — about 0.1 occurrences437–436 Mya — about 0.1 occurrences436–435 Mya — about 0.1 occurrences435–434 Mya — about 0.1 occurrences434–433 Mya — about 0.1 occurrences433–432 Mya — about 0.0 occurrences457.2 Mya445.2 Mya458.7 Mya432.4 Mya

210 occurrences of Tretaspis 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

210 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

53 formations

Dufton Shales — 54.72°N, 2.48°WHusbergøya — 59.88°N, 10.72°EHusbergøya — 59.85°N, 10.53°EHusbergøya — 59.89°N, 10.53°EHusbergøya — 59.83°N, 10.43°EHusbergøya — 59.86°N, 10.56°EVenstøp — 59.89°N, 10.69°EVenstøp — 59.92°N, 10.83°EVenstøp — 59.87°N, 10.46°EVenstøp — 60.05°N, 10.18°EVenstøp — 60.13°N, 10.28°EVenstøp — 60.00°N, 10.35°EVenstøp — 61.33°N, 8.80°EVenstøp — 59.10°N, 9.62°EVenstøp — 61.08°N, 11.75°ECampile — 53.44°N, 7.23°WCampile — 53.22°N, 7.93°WCampile — 53.45°N, 7.17°WSolvang — 60.00°N, 11.00°ESolvang — 60.13°N, 10.28°ESolvang — 60.05°N, 10.18°ESolvang — 58.45°N, 8.76°ESolvang — 59.84°N, 10.54°ESolvang — 60.22°N, 10.67°EWhite Head — 48.47°N, 64.32°WWhite Head — 48.53°N, 64.22°WWhite Head — 48.58°N, 68.18°WEdinburg — 38.99°N, 78.36°WEdinburg — 38.99°N, 78.35°WEdinburg — 38.82°N, 78.55°WEdinburg — 38.53°N, 78.78°WEdinburg — 38.56°N, 78.86°WSørbakken — 60.05°N, 10.18°ESørbakken — 60.13°N, 10.28°EKirkley Bank — 54.43°N, 2.78°WKirkley Bank — 54.43°N, 2.88°WFjacka Shale — 61.00°N, 15.00°EFjacka Shale — 58.00°N, 12.00°EFjacka Shale — 60.00°N, 16.00°EGrimsøya — 59.92°N, 10.72°EGrimsøya — 59.87°N, 10.50°EGrimsøya — 59.87°N, 10.58°EGrimsøya — 59.85°N, 10.53°EGrimsøya — 58.45°N, 8.76°ELunner — 60.33°N, 10.55°ELunner — 60.30°N, 10.53°ERaheen — 52.21°N, 6.98°WKraluv Dvur — 50.00°N, 14.00°EGrande Coupe — 48.54°N, 64.25°WFosses — 50.34°N, 5.08°EFosses — 50.39°N, 4.60°EFosses — 50.43°N, 4.99°EKnockerk — 53.75°N, 6.55°WSkjerholmen — 59.92°N, 10.72°EGagnum Limestone — 60.33°N, 10.55°EGagnum Limestone — 60.30°N, 10.52°ESholeshook — 51.80°N, 4.53°WBalclatchie — 54.84°N, 4.05°WBalclatchie — 55.24°N, 4.78°WJerrestad Shale — 57.78°N, 14.18°EJerrestad Shale — 55.54°N, 14.29°EDolhir — 52.93°N, 3.18°WGrande Coupe Beds — 49.00°N, 64.00°W

Loading coastlines…

The named rock units Tretaspis has been recovered from, largest first. Drawn where the rock is now, not where it formed. 29 further formations hold fewer occurrences each and are not listed. 11 occurrences have no formation on record, which is common for older literature.

Tretaspis and its relatives

Ordovician

Where Tretaspis and its relatives were recorded in the Ordovician.

Found in the same rock

936 taxa

The Paleobiology Database records 194 sites for Tretaspis, 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

46 references

Each of the 210 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. 34 further references are not listed. 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 content2

Picture of Tretaspis

Source
iDigBio
Credit
via iDigBio
Licence
CC BY
Commercial use
the licence allows it

3D model

Source
Sketchfab
Licence
CC Attribution-NonCommercial-ShareAlike
Commercial use
the licence does not allow it

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

Keep going

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

Occurrence data from the Paleobiology Database, CC BY 4.0. M'Coy 1849