Pachydiscus

Pachydiscus is an extinct genus of ammonite from the Late Cretaceous and Early Paleocene with a worldwide distribution, and type for the desmoceratacean family Pachydiscidae. The genus' type species is P. neubergicus. Altogether some 28 species have been described.

Pachydiscus

Wikipek · CC BY 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
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 17 million years on record.

The record covers at least 89.8 Mya to 72.2 Mya. No occurrence read is dated outside 100.5 Mya to 61.66 Mya.

Early Cretaceous — about 0 of 443 occurrencesLate Cretaceous — about 442 of 443 occurrencesLate CretaceousPaleocene — about 1 of 443 occurrencesPaleocene101–100 Mya — about 0.0 occurrences100–99 Mya — about 0.0 occurrences99–97 Mya — about 0.0 occurrences97–96 Mya — about 0.0 occurrences96–95 Mya — about 0.0 occurrences95–93 Mya — about 0.4 occurrences93–92 Mya — about 0.7 occurrences92–91 Mya — about 0.7 occurrences91–89 Mya — about 2 occurrences89–88 Mya — about 3 occurrences88–86 Mya — about 3 occurrences86–85 Mya — about 4 occurrences85–84 Mya — about 6 occurrences84–82 Mya — about 21 occurrences82–81 Mya — about 23 occurrences81–80 Mya — about 23 occurrences80–78 Mya — about 23 occurrences78–77 Mya — about 23 occurrences77–76 Mya — about 23 occurrences76–74 Mya — about 23 occurrences74–73 Mya — about 23 occurrences73–72 Mya — about 34 occurrences72–70 Mya — about 49 occurrences70–69 Mya — about 49 occurrences69–68 Mya — about 49 occurrences68–66 Mya — about 49 occurrences66–65 Mya — about 10 occurrences65–64 Mya — about 0.3 occurrences64–62 Mya — about 0.3 occurrences62–61 Mya — about 0.1 occurrences89.8 Mya72.2 Mya101.3 Mya60.9 Mya

443 occurrences of Pachydiscus 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

443 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

76 formations

Lopez de Bertodano — 64.25°S, 56.75°WLopez de Bertodano — 64.26°S, 56.72°WAhlen — 51.75°N, 8.03°EAhlen — 51.72°N, 8.03°EAhlen — 51.82°N, 8.15°EAhlen — 51.70°N, 7.92°EAhlen — 51.72°N, 7.85°EMatanuska — 62.08°N, 147.83°WMatanuska — 61.84°N, 148.06°WMatanuska — 61.91°N, 147.46°WMatanuska — 62.50°N, 150.01°WMatanuska — 62.01°N, 147.58°WMatanuska — 62.01°N, 146.80°WMatanuska — 61.97°N, 147.72°WMatanuska — 62.16°N, 147.76°WMatanuska — 61.92°N, 147.57°WKrasnoyarka — 47.33°N, 142.50°EKrasnoyarka — 47.39°N, 142.49°EKrasnoyarka — 48.71°N, 142.66°EKrasnoyarka — 48.67°N, 142.64°EGramame — 7.25°S, 34.80°WKaguyak — 58.58°N, 153.89°WKaguyak — 58.96°N, 153.95°WKaguyak — 58.92°N, 154.03°WKaguyak — 58.61°N, 153.84°WKaguyak — 58.86°N, 154.06°WKaguyak — 58.79°N, 154.07°WKaguyak — 58.88°N, 153.77°WKaguyak — 58.94°N, 153.88°WMiria — 22.77°S, 114.18°EMiria — 22.68°S, 114.24°EMiria — 22.96°S, 114.08°EMiria — 22.89°S, 114.12°EMiria — 22.83°S, 114.14°EMiria — 22.72°S, 114.25°EMoreno — 36.22°N, 120.12°WMoreno — 37.85°N, 121.71°WMoreno — 36.37°N, 120.29°WMoreno — 37.48°N, 121.23°WMoreno — 37.41°N, 121.20°WMoreno — 37.24°N, 121.14°WMoreno — 36.95°N, 120.89°WMoreno — 36.03°N, 120.14°WMoreno — 36.97°N, 120.91°WCraie de Valognes — 49.43°N, 1.35°WCraie de Valognes — 49.27°N, 0.33°WCraie de Valognes — 49.52°N, 1.47°WQuiriquina — 36.59°S, 72.98°WQuiriquina — 36.61°S, 73.06°WQuiriquina — 36.70°S, 72.97°WQuiriquina — 36.77°S, 73.09°WPrairie Bluff — 34.22°N, 89.00°WPrairie Bluff — 33.07°N, 88.61°WPrairie Bluff — 33.05°N, 88.56°WPrairie Bluff — 32.39°N, 87.92°WNacatoch Sand — 32.59°N, 96.31°WNacatoch Sand — 32.10°N, 96.47°WRagged Valley Shale — 36.33°N, 120.57°WRagged Valley Shale — 36.21°N, 120.45°WValudavur — 12.03°N, 79.75°EChico — 39.83°N, 121.71°WChico — 39.71°N, 121.94°WRosario — 30.58°N, 114.68°WRosario — 29.58°N, 115.24°WRosario — 32.41°N, 117.09°WSenpohshi — 43.01°N, 144.73°EDanish White Chalk — 57.07°N, 9.98°EDanish White Chalk — 57.02°N, 8.75°EDanish White Chalk — 57.07°N, 9.92°EDanish White Chalk — 55.85°N, 12.28°EDülmener Schichten — 51.85°N, 7.25°EDülmener Schichten — 51.90°N, 7.20°EJalama — 34.53°N, 120.41°WMarshalltown — 39.54°N, 75.72°WMarshalltown — 39.55°N, 75.65°WQahlah — 24.28°N, 55.83°EQahlah — 24.30°N, 55.86°ENkporo Shale — 5.20°N, 8.22°ENkporo Shale — 5.83°N, 7.85°EAnnona — 33.77°N, 93.92°WAnnona — 33.83°N, 93.81°WAnnona — 33.80°N, 94.06°W

Loading coastlines…

The named rock units Pachydiscus has been recovered from, largest first. Drawn where the rock is now, not where it formed. 52 further formations hold fewer occurrences each and are not listed. 110 occurrences have no formation on record, which is common for older literature.

Pachydiscus and its relatives

Late Cretaceous

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

Found in the same rock

959 taxa

The Paleobiology Database records 354 sites for Pachydiscus, and this reads 240 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

92 references

Each of the 443 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. 80 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 content2

Picture of Pachydiscus

Credit
Wikipek
Licence
CC BY 3.0
Commercial use
the licence allows it

3D model

Source
Sketchfab
Licence
CC Attribution
Commercial use
cannot be read from the licence given — check the record

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. Zittel 1884