Crotalocephalus

Crotalocephalus is a genus of trilobites that lived from the Late Silurian to the Early Devonian. Its remains have been found in Asia, Australia, Africa, and Europe.

Crotalocephalus

DardS8Br · 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
CheiruridaePBDB
Diet
carnivorePBDB, for Cheiruridae
Life habit
low-level epifaunalPBDB, for Trilobita
Motility
fast-movingPBDB, for Trilobita
Vision
well-developedPBDB
Environment
marinePBDB, for Trilobita

Time the record covers

At least 44 million years on record.

The record covers at least 426.7 Mya to 382.31 Mya. No occurrence read is dated outside 432.9 Mya to 379 Mya.

Silurian — about 20 of 80 occurrencesSilurianDevonian — about 60 of 80 occurrencesDevonian434–432 Mya — about 0.1 occurrences432–430 Mya — about 0.3 occurrences430–428 Mya — about 0.3 occurrences428–427 Mya — about 0.6 occurrences427–425 Mya — about 4 occurrences425–423 Mya — about 9 occurrences423–421 Mya — about 4 occurrences421–419 Mya — about 3 occurrences419–417 Mya — about 3 occurrences417–415 Mya — about 3 occurrences415–413 Mya — about 3 occurrences413–412 Mya — about 10 occurrences412–410 Mya — about 7 occurrences410–408 Mya — about 2 occurrences408–406 Mya — about 2 occurrences406–404 Mya — about 2 occurrences404–402 Mya — about 2 occurrences402–400 Mya — about 2 occurrences400–398 Mya — about 3 occurrences398–397 Mya — about 4 occurrences397–395 Mya — about 4 occurrences395–393 Mya — about 3 occurrences393–391 Mya — about 3 occurrences391–389 Mya — about 3 occurrences389–387 Mya — about 2 occurrences387–385 Mya — about 0.2 occurrences385–384 Mya — about 0.2 occurrences384–382 Mya — about 0.3 occurrences382–380 Mya — about 0.6 occurrences380–378 Mya — about 0.2 occurrences426.7 Mya382.31 Mya434 Mya378 Mya

80 occurrences of Crotalocephalus 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

80 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

35 formations

Kopanina — 50.00°N, 14.35°EKopanina — 49.95°N, 12.93°EKopanina — 49.52°N, 13.50°EKopanina — 50.08°N, 14.47°EPozary — 49.95°N, 12.93°EPozary — 50.03°N, 14.32°EPozary — 49.52°N, 13.50°EPozary — 50.00°N, 17.78°EBoola Beds — 38.15°S, 146.47°ELambertenghi — 46.50°N, 13.00°EZlichov Limestone — 50.00°N, 14.00°EZlichov Limestone — 49.50°N, 14.33°EDzhalpak — 40.47°N, 66.13°EFukata — 33.53°N, 133.22°EPort Refugia — 55.50°N, 132.33°WVinarice Limestone — 50.00°N, 14.00°ESaheb el Djir — 31.92°N, 1.85°WKhodzhakurgan — 39.21°N, 67.38°EDaleje-Trebotov — 49.92°N, 14.07°EChotec Limestone — 49.92°N, 14.07°EDaleje Shale — 50.04°N, 14.39°EChotec — 49.50°N, 14.33°EFairhill — 33.20°S, 148.68°EMaradana Shale — 33.20°S, 148.68°EBlack Bog — 35.00°S, 149.00°ESilverdale — 34.83°S, 148.92°ERosebank Shale — 34.83°S, 148.92°EMason Porcus — 39.43°N, 8.50°EGrou Limestone — 34.03°N, 6.85°WGhtira Limestone — 34.03°N, 6.85°WSafsaf Limestone — 34.03°N, 6.85°W

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The named rock units Crotalocephalus has been recovered from, largest first. Drawn where the rock is now, not where it formed. 11 further formations hold fewer occurrences each and are not listed. 20 occurrences have no formation on record, which is common for older literature.

Crotalocephalus and its relatives

Devonian

Where Crotalocephalus and its relatives were recorded in the Devonian.

Found in the same rock

1,033 taxa

The Paleobiology Database records 76 sites for Crotalocephalus, 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

30 references

Each of the 80 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. 18 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 Crotalocephalus

Credit
DardS8Br
Licence
CC BY-SA 4.0
Commercial use
the licence allows it

3D model

Source
Sketchfab
Licence
CC Attribution
Commercial use
cannot be read from the licence given — check the record

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 itCheiruridae through timeFormations of the DevonianThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. (Salter 1853)