Cyrtorizoceras

Cyrtorizoceras

via iDigBio · CC BY-SA · 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
OncoceratidaePBDB
Diet
carnivorePBDB, for Oncocerida
Life habit
nektobenthicPBDB, for Oncocerida
Motility
fast-movingPBDB, for Cephalopoda
Vision
well-developedPBDB, for Cephalopoda
Environment
marinePBDB, for Cephalopoda

Time the record covers

At least 115 million years on record.

The record covers at least 451 Mya to 335.4 Mya. No occurrence read is dated outside 458.2 Mya to 323.4 Mya.

Ordovician — about 16 of 27 occurrencesOrdovicianSilurian — about 10 of 27 occurrencesSilurianDevonian — about 0 of 27 occurrencesCarboniferous — about 1 of 27 occurrencesCarboniferous461–456 Mya — about 1 occurrence456–452 Mya — about 7 occurrences452–447 Mya — about 6 occurrences447–442 Mya — about 2 occurrences442–438 Mya — about 1 occurrence438–433 Mya — about 2 occurrences433–428 Mya — about 5 occurrences428–424 Mya — about 0.5 occurrences339–335 Mya — about 0.1 occurrences335–330 Mya — about 0.4 occurrences330–325 Mya — about 0.4 occurrences325–321 Mya — about 0.2 occurrences451 Mya335.4 Mya461 Mya321 Mya

27 occurrences of Cyrtorizoceras 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

27 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

14 formations

Racine — 42.73°N, 87.78°WRacine — 42.88°N, 88.04°WRacine — 43.05°N, 88.01°WDenley Limestone — 43.21°N, 75.46°WDenley Limestone — 44.00°N, 75.00°WDenley Limestone — 43.28°N, 75.14°WBoda Limestone — 61.17°N, 14.71°EBoda Limestone — 61.05°N, 15.20°ECarey — 34.48°N, 97.19°WMifflin — 43.00°N, 91.00°WGrand Detour — 43.00°N, 91.00°WNachusa — 43.00°N, 91.00°WQuimbys Mill — 43.00°N, 91.00°WKanKing — 41.00°N, 79.00°EEllis Bay — 49.83°N, 64.38°WAtikameg Dolomite — 58.77°N, 94.17°WKilbride — 53.65°N, 9.37°WBønsnes — 66.77°N, 13.47°ESouth Threave — 55.25°N, 4.85°W

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The named rock units Cyrtorizoceras 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.

Cyrtorizoceras and its relatives

Ordovician

Where Cyrtorizoceras and its relatives were recorded in the Ordovician.

Found in the same rock

653 taxa

The Paleobiology Database records 23 sites for Cyrtorizoceras, 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

13 references

Each of the 27 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. 1 further reference is 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 Cyrtorizoceras

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

No 3D scan of Cyrtorizoceras was found in MorphoSource and Sketchfab.

Smithsonian Open Access was not reached for this taxon, so this list is what the others held rather than everything there is.

This is what the site found, which is not the same as what exists.

Keep going

What may have been alongside itOncoceratidae through timeFormations of the OrdovicianThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. Hyatt 1900