Pachycrommium

Pachycrommium

via iDigBio · CC BY · 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
AmpullinidaePBDB
Diet
grazerPBDB, for Ampullinoidea
Life habit
epifaunalPBDB, for Ampullinoidea
Motility
actively mobilePBDB, for Ampullinoidea
Vision
limitedPBDB, for Gastropoda

Time the record covers

At least 52 million years on record.

The record covers at least 56 Mya to 3.6 Mya. No occurrence read is dated outside 66 Mya to 2.58 Mya.

Late Cretaceous — about 0 of 250 occurrencesPaleocene — about 4 of 250 occurrencesPaleoceneEocene — about 129 of 250 occurrencesEoceneOligocene — about 19 of 250 occurrencesOligoceneMiocene — about 83 of 250 occurrencesMiocenePliocene — about 15 of 250 occurrencesPleistocene — about 0 of 250 occurrences67–65 Mya — about 0.1 occurrences65–63 Mya — about 0.2 occurrences63–61 Mya — about 0.4 occurrences61–58 Mya — about 1 occurrence58–56 Mya — about 2 occurrences56–54 Mya — about 9 occurrences54–52 Mya — about 10 occurrences52–50 Mya — about 10 occurrences50–47 Mya — about 13 occurrences47–45 Mya — about 23 occurrences45–43 Mya — about 23 occurrences43–41 Mya — about 22 occurrences41–39 Mya — about 5 occurrences39–36 Mya — about 6 occurrences36–34 Mya — about 7 occurrences34–32 Mya — about 5 occurrences32–30 Mya — about 5 occurrences30–28 Mya — about 5 occurrences28–25 Mya — about 3 occurrences25–23 Mya — about 2 occurrences23–21 Mya — about 6 occurrences21–19 Mya — about 8 occurrences19–17 Mya — about 9 occurrences17–15 Mya — about 8 occurrences15–12 Mya — about 3 occurrences12–10 Mya — about 8 occurrences10–7.9 Mya — about 11 occurrences7.9–5.7 Mya — about 24 occurrences5.7–3.5 Mya — about 16 occurrences3.5–1.3 Mya — about 5 occurrences56 Mya3.6 Mya67 Mya1 Mya

250 occurrences of Pachycrommium on record, most of them in the Eocene. 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

250 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

70 formations

Llajas — 34.31°N, 118.67°WLlajas — 34.32°N, 118.63°WLlajas — 34.23°N, 118.76°WCercado — 19.47°N, 71.08°WCercado — 19.53°N, 71.20°WCercado — 19.53°N, 71.27°WCercado — 19.30°N, 71.67°WCercado — 18.93°N, 71.62°WGurabo — 19.48°N, 71.09°WGurabo — 19.48°N, 70.98°WGurabo — 19.53°N, 71.33°WGurabo — 19.58°N, 71.05°WGurabo — 19.30°N, 71.67°WGurabo — 19.50°N, 71.18°WGurabo — 18.93°N, 71.62°WDrug — 29.95°N, 70.12°EJuncal — 34.77°N, 119.15°WJuncal — 34.47°N, 119.02°WJuncal — 34.40°N, 118.48°WJuncal — 34.56°N, 118.72°WJuncal — 34.55°N, 118.73°WInglis Limestone — 29.23°N, 82.70°WInglis Limestone — 29.02°N, 82.64°WInglis Limestone — 29.05°N, 82.45°WInglis Limestone — 29.03°N, 82.67°WInglis Limestone — 28.92°N, 82.46°WShekhan — 33.58°N, 71.83°EShekhan — 33.60°N, 71.90°EGheldeis — 9.23°N, 50.67°EGheldeis — 9.60°N, 50.78°EGheldeis — 9.50°N, 50.63°EGheldeis — 9.75°N, 50.78°EGheldeis — 9.32°N, 50.40°EGheldeis — 7.87°N, 49.80°EMatilija — 34.54°N, 118.75°WMatilija — 34.54°N, 118.74°WMatilija — 34.56°N, 120.19°WManiobra — 33.60°N, 115.66°WBaitoa — 19.30°N, 70.80°WBaitoa — 19.17°N, 70.70°WBaitoa — 18.47°N, 71.05°WMao — 19.67°N, 71.40°WMao — 19.53°N, 71.18°WPirabas — 0.48°S, 48.17°WPirabas — 1.05°S, 47.16°WPirabas — 0.60°S, 47.31°WPirabas — 2.41°S, 44.42°WSanta Susana — 34.29°N, 118.69°WSanta Susana — 34.25°N, 118.74°WChipola — 30.44°N, 85.19°WCulebra — 9.08°N, 79.68°WCulebra — 9.03°N, 79.63°WNari — 26.36°N, 67.86°ENari — 26.14°N, 66.79°ENari — 25.38°N, 67.80°EJaffna Limestone — 6.40°N, 81.58°EJaffna Limestone — 9.82°N, 80.00°EJaffna Limestone — 6.43°N, 81.50°ERoseburg — 43.01°N, 123.91°WRoseburg — 43.27°N, 123.45°WRoseburg — 43.24°N, 123.42°WOak Grove — 30.92°N, 86.57°WBushnell Rock — 43.27°N, 123.15°WBowden — 17.88°N, 76.28°WArcadia — 27.89°N, 82.48°WArcadia — 27.96°N, 82.37°WNdalithoni Limestone — 17.23°S, 178.95°E

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The named rock units Pachycrommium has been recovered from, largest first. Drawn where the rock is now, not where it formed. 46 further formations hold fewer occurrences each and are not listed. 13 occurrences have no formation on record, which is common for older literature.

Pachycrommium and its relatives

Eocene

Where Pachycrommium and its relatives were recorded in the Eocene.

Found in the same rock

2,650 taxa

The Paleobiology Database records 167 sites for Pachycrommium, and this reads all of them. Of that, one read hit the database's own return limit, so every count below is a floor rather than a total. 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

67 references

Each of the 250 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. 55 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 Pachycrommium

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

No 3D scan of Pachycrommium 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 itAmpullinidae through timeFormations of the EoceneThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. (Woodring 1928)