Trinucleus

Trinucleus is a genus of trilobites of the order Asaphida. It is in the family Trinucleidae.

Trinucleus

AtmosPhysicist · CC BY-SA 4.0 · 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
TrinucleidaePBDB
Diet
suspension feederPBDB, for Trinucleidae
Life habit
low-level epifaunalPBDB, for Trilobita
Motility
fast-movingPBDB, for Trilobita
Vision
blindPBDB
Environment
marinePBDB, for Trilobita

Time the record covers

At least 18 million years on record.

The record covers at least 468 Mya to 449.5 Mya. No occurrence read is dated outside 477.1 Mya to 445.2 Mya.

Ordovician — about 29 of 29 occurrencesOrdovician478–477 Mya — about 0.1 occurrences477–476 Mya — about 0.2 occurrences476–474 Mya — about 0.2 occurrences474–473 Mya — about 0.2 occurrences473–472 Mya — about 0.2 occurrences472–471 Mya — about 0.2 occurrences471–470 Mya — about 0.2 occurrences470–469 Mya — about 0.3 occurrences469–468 Mya — about 0.4 occurrences468–467 Mya — about 0.4 occurrences467–466 Mya — about 0.4 occurrences466–464 Mya — about 0.4 occurrences464–463 Mya — about 0.4 occurrences463–462 Mya — about 0.4 occurrences462–461 Mya — about 0.4 occurrences461–460 Mya — about 1 occurrence460–459 Mya — about 1 occurrence459–458 Mya — about 1 occurrence458–457 Mya — about 1 occurrence457–456 Mya — about 0.4 occurrences456–455 Mya — about 0.4 occurrences455–453 Mya — about 0.4 occurrences453–452 Mya — about 0.8 occurrences452–451 Mya — about 1 occurrence451–450 Mya — about 1 occurrence450–449 Mya — about 2 occurrences449–448 Mya — about 3 occurrences448–447 Mya — about 3 occurrences447–446 Mya — about 3 occurrences446–445 Mya — about 1 occurrence468 Mya449.5 Mya477.7 Mya444.6 Mya

29 occurrences of Trinucleus 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

29 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

10 formations

Sella — 21.38°S, 64.72°WGullhögen — 58.00°N, 12.00°ESepulturas — 22.92°S, 65.62°WKermeur — 47.79°N, 3.80°WKermeur Sandstone — 47.79°N, 3.80°WAber Mawr Shale — 51.93°N, 5.20°WLlanfawr Mudstone — 52.23°N, 3.37°WElnes — 59.53°N, 9.58°EMydrim Shales — 51.85°N, 4.84°WLyckholm — 59.28°N, 26.18°E

Loading coastlines…

The named rock units Trinucleus has been recovered from, largest first. Drawn where the rock is now, not where it formed. 17 occurrences have no formation on record, which is common for older literature.

Trinucleus and its relatives

Ordovician

Where Trinucleus and its relatives were recorded in the Ordovician.

Found in the same rock

109 taxa

The Paleobiology Database records 19 sites for Trinucleus, 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

11 references

Each of the 29 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 content2

Picture of Trinucleus

Credit
AtmosPhysicist
Licence
CC BY-SA 4.0
Commercial use
the licence allows it

3D model

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

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 itTrinucleidae through timeFormations of the OrdovicianThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. Murchison 1839