Trimerocephalus

Trimerocephalus is a genus of eyeless trilobites from the order Phacopida, family Phacopidae. It lived during the final stage of the Devonian, the Famennian, and became extinct at the end of this stage, together with all other trilobites with the exception of some Proetida. It can be found in Australia, the Czech Republic, France, Germany, Iran, Kazakhstan, Morocco, Poland, the Russian Federation (Urals), Spain, and the United Kingdom (England).

Trimerocephalus

Uncredited · 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
PhacopidaePBDB
Diet
carnivorePBDB, for Phacopina
Life habit
infaunalPBDB
Motility
fast-movingPBDB, for Trilobita
Vision
blindPBDB
Environment
marinePBDB, for Trilobita

Time the record covers

At least 22 million years on record.

The record covers at least 387.95 Mya to 365.2 Mya. No occurrence read is dated outside 410.2 Mya to 358.86 Mya.

Devonian — about 36 of 36 occurrencesDevonianCarboniferous — about 0 of 36 occurrences411–409 Mya — about 0.0 occurrences409–408 Mya — about 0.1 occurrences408–406 Mya — about 0.1 occurrences406–404 Mya — about 0.1 occurrences404–402 Mya — about 0.1 occurrences402–401 Mya — about 0.1 occurrences401–399 Mya — about 0.1 occurrences399–397 Mya — about 0.1 occurrences397–395 Mya — about 0.1 occurrences395–393 Mya — about 0.1 occurrences393–392 Mya — about 0.1 occurrences392–390 Mya — about 0.1 occurrences390–388 Mya — about 0.1 occurrences388–386 Mya — about 0.0 occurrences386–385 Mya — about 0.5 occurrences385–383 Mya — about 0.5 occurrences383–381 Mya — about 0.1 occurrences381–379 Mya — about 0.1 occurrences379–377 Mya — about 0.1 occurrences377–376 Mya — about 0.1 occurrences376–374 Mya — about 0.5 occurrences374–372 Mya — about 0.8 occurrences372–370 Mya — about 5 occurrences370–369 Mya — about 5 occurrences369–367 Mya — about 9 occurrences367–365 Mya — about 8 occurrences365–363 Mya — about 2 occurrences363–361 Mya — about 2 occurrences361–360 Mya — about 2 occurrences360–358 Mya — about 0.8 occurrences387.95 Mya365.2 Mya411 Mya358 Mya

36 occurrences of Trimerocephalus 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

36 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

17 formations

Thalenberg — 50.71°N, 8.18°EVirgin Hills — 18.51°S, 125.95°EVirgin Hills — 18.73°S, 126.08°EMarhouma — 30.23°N, 2.41°WMarhouma — 29.95°N, 2.10°WMarhouma — 29.93°N, 1.97°WManticoceras Limestone — 50.78°N, 20.55°EManticoceras Limestone — 50.80°N, 20.57°EErfoud — 31.26°N, 3.91°WErfoud — 31.23°N, 3.98°WVidrieros — 43.08°N, 4.92°WZorn — 48.40°N, 4.48°WLa Hoya — 41.70°N, 1.55°WWee Jasper — 35.06°S, 148.64°EShishtu — 33.67°N, 57.10°ECoumiac — 43.47°N, 3.09°EMarhouma — 29.96°N, 2.10°WBohlen — 50.63°N, 11.38°EMassenkalk — 51.20°N, 8.05°EBicken-Ense — 51.38°N, 8.81°EPlattensandstein — 51.38°N, 7.73°ENehden — 51.43°N, 8.63°E

Loading coastlines…

The named rock units Trimerocephalus has been recovered from, largest first. Drawn where the rock is now, not where it formed. 8 occurrences have no formation on record, which is common for older literature.

Trimerocephalus and its relatives

Devonian

Where Trimerocephalus and its relatives were recorded in the Devonian.

Found in the same rock

119 taxa

The Paleobiology Database records 29 sites for Trimerocephalus, 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

24 references

Each of the 36 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. 12 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 content1

Picture of Trimerocephalus

Credit
nobody named on the record
Licence
not stated by the source
Commercial use
cannot be read from the licence given — check the record

No 3D scan of Trimerocephalus 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 itPhacopidae through timeFormations of the DevonianThe world it lived on

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