Eupachydiscus

Eupachydisus is a large, coarse-ribbed Pachydiscid ammonite genus from the Upper Cretaceous, found in Coniacian to Campanian age strata in Europe, Madagascar, Japan, and British Columbia.

Eupachydiscus

Daderot · CC0 · 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
PachydiscidaePBDB
Diet
carnivorePBDB, for Ammonoidea
Life habit
nektonicPBDB, for Ammonoidea
Motility
fast-movingPBDB, for Ammonoidea
Vision
well-developedPBDB, for Cephalopoda
Environment
marinePBDB, for Cephalopoda

Time the record covers

At least 13 million years on record.

The record covers at least 85.7 Mya to 72.2 Mya. No occurrence read is dated outside 89.8 Mya to 66 Mya.

Late Cretaceous — about 60 of 60 occurrencesLate CretaceousPaleocene — about 0 of 60 occurrences90–89 Mya — about 0.7 occurrences89–89 Mya — about 2 occurrences89–88 Mya — about 2 occurrences88–87 Mya — about 2 occurrences87–86 Mya — about 2 occurrences86–85 Mya — about 5 occurrences85–85 Mya — about 10 occurrences85–84 Mya — about 10 occurrences84–83 Mya — about 3 occurrences83–82 Mya — about 2 occurrences82–81 Mya — about 2 occurrences81–80 Mya — about 2 occurrences80–80 Mya — about 2 occurrences80–79 Mya — about 2 occurrences79–78 Mya — about 2 occurrences78–77 Mya — about 2 occurrences77–76 Mya — about 2 occurrences76–75 Mya — about 2 occurrences75–75 Mya — about 2 occurrences75–74 Mya — about 2 occurrences74–73 Mya — about 2 occurrences73–72 Mya — about 2 occurrences72–71 Mya — about 0.4 occurrences71–70 Mya — about 0.4 occurrences70–70 Mya — about 0.4 occurrences70–69 Mya — about 0.4 occurrences69–68 Mya — about 0.4 occurrences68–67 Mya — about 0.4 occurrences67–66 Mya — about 0.4 occurrences66–66 Mya — about 0.2 occurrences85.7 Mya72.2 Mya90.3 Mya65.5 Mya

60 occurrences of Eupachydiscus on record, most of them in the Late Cretaceous. 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

60 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

22 formations

Hinoshima — 32.47°N, 130.47°EHinoshima — 32.39°N, 130.40°ESanta Marta — 63.75°S, 58.00°WSanta Marta — 64.23°S, 56.62°WRedding — 40.56°N, 122.16°WRedding — 40.62°N, 122.12°WBykov — 48.73°N, 142.60°ESant Corneli — 42.17°N, 0.90°EKashima — 43.26°N, 142.06°EKashima — 43.20°N, 142.02°EForbes — 38.88°N, 122.17°WFunks — 38.90°N, 122.26°WCarregador de Carreu — 42.17°N, 0.90°ETexanitid Marls — 42.17°N, 0.90°EOzan — 33.42°N, 95.95°WSaint Cirac — 42.92°N, 1.75°EUmzamba — 29.87°S, 31.02°EHidden Lake — 63.75°S, 58.00°WKajisako — 33.75°N, 133.97°EOhimisaki — 45.52°N, 141.94°EMount Peace — 18.38°N, 78.13°WChinomigawa — 42.18°N, 142.73°EHochmoos — 47.58°N, 13.51°ECalcaires à Lima — 42.91°N, 2.35°EPender — 49.69°N, 125.04°WUpper Haborogawa — 44.69°N, 142.02°E

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The named rock units Eupachydiscus has been recovered from, largest first. Drawn where the rock is now, not where it formed. 21 occurrences have no formation on record, which is common for older literature.

Eupachydiscus and its relatives

Late Cretaceous

Where Eupachydiscus and its relatives were recorded in the Late Cretaceous.

Found in the same rock

266 taxa

The Paleobiology Database records 54 sites for Eupachydiscus, 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

33 references

Each of the 60 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. 21 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 Eupachydiscus

Credit
Daderot
Licence
CC0
Commercial use
the licence allows it

No 3D scan of Eupachydiscus 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 itPachydiscidae through timeFormations of the Late CretaceousThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. Spath 1922