Crepicephalina

Crepicephalina is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the Cambrian Period, which lasted from approximately 542 to 488 million years ago.

Crepicephalina

via iDigBio · 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
CrepicephalidaePBDB
Diet
carnivorePBDB, for Trilobita
Life habit
low-level epifaunalPBDB, for Trilobita
Motility
fast-movingPBDB, for Trilobita
Vision
well-developedPBDB, for Crepicephalidae
Environment
marinePBDB, for Trilobita

Time the record covers

At most 9.5 million years on record.

Every occurrence read is dated to somewhere between 506.5 Mya and 497 Mya, and nothing in the dating separates them, so that window is what the record shows rather than a span.

Cambrian — about 11 of 11 occurrencesCambrian507–506 Mya — about 1 occurrence506–506 Mya — about 2 occurrences506–506 Mya — about 2 occurrences506–505 Mya — about 2 occurrences505–505 Mya — about 2 occurrences505–505 Mya — about 2 occurrences505–504 Mya — about 0.3 occurrences504–504 Mya — about 0.0 occurrences504–504 Mya — about 0.0 occurrences504–503 Mya — about 0.0 occurrences503–503 Mya — about 0.0 occurrences503–502 Mya — about 0.0 occurrences502–502 Mya — about 0.0 occurrences502–502 Mya — about 0.0 occurrences502–501 Mya — about 0.0 occurrences501–501 Mya — about 0.0 occurrences501–501 Mya — about 0.0 occurrences501–500 Mya — about 0.0 occurrences500–500 Mya — about 0.0 occurrences500–500 Mya — about 0.0 occurrences500–499 Mya — about 0.0 occurrences499–499 Mya — about 0.0 occurrences499–499 Mya — about 0.0 occurrences499–498 Mya — about 0.0 occurrences498–498 Mya — about 0.0 occurrences498–498 Mya — about 0.0 occurrences498–497 Mya — about 0.0 occurrences497–497 Mya — about 0.0 occurrences507 Mya496.5 Mya

11 occurrences of Crepicephalina on record, most of them in the Cambrian. 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

11 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

2 formations

Zhangxia — 35.57°N, 110.47°EZhangxia — 34.75°N, 110.62°EZhangxia — 34.85°N, 117.55°EZhangxia — 34.63°N, 112.97°EZhangxia — 34.80°N, 111.90°EZhangxia — 35.42°N, 114.05°EZhangxia — 36.63°N, 116.95°EHuaqiao — 28.39°N, 109.53°EHuaqiao — 28.72°N, 109.97°E

Loading coastlines…

The named rock units Crepicephalina has been recovered from, largest first. Drawn where the rock is now, not where it formed.

Crepicephalina and its relatives

Cambrian

Where Crepicephalina and its relatives were recorded in the Cambrian.

Found in the same rock

5 taxa

The Paleobiology Database records 1 site for Crepicephalina, and this reads all of them. The number is how many of those sites it was catalogued from too.

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

6 references

Each of the 11 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 Crepicephalina

Source
iDigBio
Credit
via iDigBio
Licence
not stated by the source
Commercial use
cannot be read from the licence given — check the record

No 3D scan of Crepicephalina 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 itCrepicephalidae through timeFormations of the CambrianThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. Resser and Endo 1935