Leurocycloceras

Leurocycloceras is an extinct genus of actively mobile carnivorous cephalopod, essentially a nautiloid, that lived in what would be North America, Europe, and Asia during the Silurian from 443.7—418.7 mya, existing for approximately 25 million years.

Leurocycloceras

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
LeurocycloceratinaePBDB
Diet
carnivorePBDB, for Orthocerida
Life habit
nektonicPBDB, for Orthocerida
Motility
actively mobilePBDB, for Orthocerida
Vision
well-developedPBDB, for Cephalopoda
Environment
marinePBDB, for Orthocerida

Time the record covers

At least 7.9 million years on record.

The record covers at least 432.9 Mya to 425 Mya. No occurrence read is dated outside 443.1 Mya to 422.7 Mya.

Ordovician — about 0 of 13 occurrencesSilurian — about 13 of 13 occurrencesSilurian444–443 Mya — about 0.0 occurrences443–442 Mya — about 0.2 occurrences442–441 Mya — about 0.2 occurrences441–441 Mya — about 0.2 occurrences441–440 Mya — about 0.2 occurrences440–439 Mya — about 0.2 occurrences439–439 Mya — about 0.2 occurrences439–438 Mya — about 0.3 occurrences438–437 Mya — about 0.3 occurrences437–436 Mya — about 0.3 occurrences436–436 Mya — about 0.3 occurrences436–435 Mya — about 0.3 occurrences435–434 Mya — about 0.3 occurrences434–434 Mya — about 0.3 occurrences434–433 Mya — about 0.3 occurrences433–432 Mya — about 0.7 occurrences432–431 Mya — about 0.7 occurrences431–431 Mya — about 0.7 occurrences431–430 Mya — about 0.2 occurrences430–429 Mya — about 0.1 occurrences429–429 Mya — about 0.1 occurrences429–428 Mya — about 0.1 occurrences428–427 Mya — about 0.1 occurrences427–426 Mya — about 0.2 occurrences426–426 Mya — about 0.4 occurrences426–425 Mya — about 0.4 occurrences425–424 Mya — about 2 occurrences424–424 Mya — about 2 occurrences424–423 Mya — about 2 occurrences423–422 Mya — about 0.6 occurrences432.9 Mya425 Mya443.6 Mya422.2 Mya

13 occurrences of Leurocycloceras on record, most of them in the Silurian. 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

13 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

5 formations

Overton — 52.48°N, 2.63°WRacine — 42.73°N, 87.78°WRacine — 42.88°N, 88.04°WRacine — 43.05°N, 88.01°WLower Whitcliffe — 52.00°N, 3.00°WWhitcliffe — 51.88°N, 2.23°WWether Law Linn — 55.81°N, 3.35°W

Loading coastlines…

The named rock units Leurocycloceras has been recovered from, largest first. Drawn where the rock is now, not where it formed. 2 occurrences have no formation on record, which is common for older literature.

Leurocycloceras and its relatives

Silurian

Where Leurocycloceras and its relatives were recorded in the Silurian.

Found in the same rock

230 taxa

The Paleobiology Database records 13 sites for Leurocycloceras, 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

7 references

Each of the 13 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 Leurocycloceras

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

No 3D scan of Leurocycloceras 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 itLeurocycloceratinae through timeFormations of the SilurianThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. Foerste 1928