Geisonoceras

Geisonoceras is an extinct orthocerid genus named by Hyatt, 1884, and type for the Geisonoceratidae established by Zhuravleva in 1959.

Geisonoceras

“Jon Zander ( Digon3 )" · CC BY-SA 3.0 · 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
GeisonoceratidaePBDB
Diet
carnivorePBDB, for Cephalopoda
Life habit
nektonicPBDB, for Cephalopoda
Motility
fast-movingPBDB, for Cephalopoda
Vision
well-developedPBDB, for Cephalopoda
Environment
marinePBDB, for Cephalopoda

Time the record covers

At least 71 million years on record.

The record covers at least 459.7 Mya to 387.95 Mya. No occurrence read is dated outside 486.85 Mya to 385.9 Mya.

Cambrian — about 0 of 85 occurrencesOrdovician — about 57 of 85 occurrencesOrdovicianSilurian — about 27 of 85 occurrencesSilurianDevonian — about 1 of 85 occurrencesDevonian489–485 Mya — about 0.0 occurrences485–482 Mya — about 0.1 occurrences482–478 Mya — about 0.1 occurrences478–475 Mya — about 0.1 occurrences475–471 Mya — about 0.1 occurrences471–468 Mya — about 2 occurrences468–464 Mya — about 2 occurrences464–461 Mya — about 3 occurrences461–457 Mya — about 7 occurrences457–454 Mya — about 6 occurrences454–450 Mya — about 21 occurrences450–447 Mya — about 12 occurrences447–443 Mya — about 3 occurrences443–440 Mya — about 7 occurrences440–436 Mya — about 3 occurrences436–433 Mya — about 3 occurrences433–429 Mya — about 3 occurrences429–426 Mya — about 4 occurrences426–422 Mya — about 7 occurrences422–419 Mya — about 0.8 occurrences391–387 Mya — about 0.3 occurrences387–384 Mya — about 0.7 occurrences459.7 Mya387.95 Mya489 Mya384 Mya

85 occurrences of Geisonoceras 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

85 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

39 formations

Denley Limestone — 43.21°N, 75.46°WDenley Limestone — 44.00°N, 75.00°WDenley Limestone — 43.28°N, 75.14°WDenley Limestone — 43.00°N, 75.00°WWhitby — 45.50°N, 81.00°WWhitby — 43.88°N, 78.86°WWhitby — 43.87°N, 79.03°WWhitby — 43.80°N, 79.12°WWhitby — 44.53°N, 80.38°WFluminimaggiore — 39.43°N, 8.50°EFluminimaggiore — 39.32°N, 8.53°EBoda Limestone — 61.17°N, 14.71°EBoda Limestone — 61.05°N, 15.20°EBoda Limestone — 60.97°N, 15.13°EKings Falls — 43.21°N, 75.46°WKochumdek — 49.40°N, 136.38°ESegerstad Limestone — 57.00°N, 17.00°ESegerstad Limestone — 61.00°N, 15.00°EFolkeslunda — 57.00°N, 17.00°EFolkeslunda — 60.91°N, 15.02°ESeby Limestone — 60.91°N, 15.02°ESeby Limestone — 62.97°N, 14.48°EKopanina — 50.00°N, 14.35°EKopanina — 49.93°N, 14.05°EMaquoketa — 45.00°N, 93.00°WLower Shiqipo — 28.15°N, 85.97°EChorkuin — 39.88°N, 70.25°EUtica Shale — 42.99°N, 74.80°WUtica Shale — 43.24°N, 75.26°WUtica — 42.98°N, 74.82°WMoyerokan — 67.37°N, 104.10°EMoyerokan — 67.34°N, 104.10°ESugar River — 43.21°N, 75.46°WDolgeville Facies — 43.21°N, 75.46°WNicolet River — 45.37°N, 73.44°WPozary — 50.03°N, 14.32°ENingqiang — 32.83°N, 106.29°EGlenwood — 45.00°N, 93.00°WPlatteville — 45.00°N, 93.00°WPecatonica — 43.00°N, 91.00°W

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The named rock units Geisonoceras has been recovered from, largest first. Drawn where the rock is now, not where it formed. 15 further formations hold fewer occurrences each and are not listed. 9 occurrences have no formation on record, which is common for older literature.

Geisonoceras and its relatives

Ordovician

Where Geisonoceras and its relatives were recorded in the Ordovician.

Found in the same rock

1,080 taxa

The Paleobiology Database records 75 sites for Geisonoceras, 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

32 references

Each of the 85 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. 20 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 Geisonoceras

Credit
“Jon Zander ( Digon3 )"
Licence
CC BY-SA 3.0
Commercial use
the licence allows it

No 3D scan was found. Smithsonian Open Access, MorphoSource and Sketchfab were all searched.

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 itGeisonoceratidae through timeFormations of the OrdovicianThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. Hyatt 1884