Eupachydiscus

Searched as Eupachydiscus haradai usheri. The Paleobiology Database treats Eupachydiscus as the accepted name.

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

Uncredited · 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 most 2.1 million years on record.

Every occurrence read is dated to somewhere between 85.7 Mya and 83.6 Mya, and nothing in the dating separates them, so that window is what the record shows rather than a span.

Late Cretaceous — about 3 of 3 occurrencesLate Cretaceous86–86 Mya — about 0.0 occurrences86–86 Mya — about 0.1 occurrences86–85 Mya — about 0.1 occurrences85–85 Mya — about 0.1 occurrences85–85 Mya — about 0.1 occurrences85–85 Mya — about 0.1 occurrences85–85 Mya — about 0.1 occurrences85–85 Mya — about 0.1 occurrences85–85 Mya — about 0.1 occurrences85–85 Mya — about 0.1 occurrences85–85 Mya — about 0.1 occurrences85–85 Mya — about 0.1 occurrences85–84 Mya — about 0.1 occurrences84–84 Mya — about 0.1 occurrences84–84 Mya — about 0.1 occurrences84–84 Mya — about 0.1 occurrences84–84 Mya — about 0.1 occurrences84–84 Mya — about 0.1 occurrences84–84 Mya — about 0.1 occurrences84–84 Mya — about 0.1 occurrences84–84 Mya — about 0.1 occurrences84–84 Mya — about 0.0 occurrences86.2 Mya83.1 Mya

3 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

3 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

1 formation

Haslam — 49.18°N, 124.33°WHaslam — 49.08°N, 124.01°W

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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.

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

1 reference

Each of the 3 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. Each entry links to doi.org. Relayed as the Paleobiology Database holds them, not checked against what they resolve to.

Media and terms

Media content1

Picture of Eupachydiscus

Credit
nobody named on the record
Licence
not stated by the source
Commercial use
cannot be read from the licence given — check the record

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