Crommium

Crommium is an extinct genus of sea snails, marine gastropod molluscs in the family Ampullinidae.

Crommium

Hectonichus · 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
AmpullospirinaePBDB
Diet
carnivorePBDB, for Naticidae
Life habit
semi-infaunalPBDB, for Naticidae
Motility
actively mobilePBDB, for Naticidae
Vision
limitedPBDB, for Gastropoda

Time the record covers

At least 27 million years on record.

The record covers at least 61.66 Mya to 33.9 Mya. No occurrence read is dated outside 83.6 Mya to 23.04 Mya.

Late Cretaceous — about 1 of 149 occurrencesLate CretaceousPaleocene — about 10 of 149 occurrencesPaleoceneEocene — about 133 of 149 occurrencesEoceneOligocene — about 5 of 149 occurrencesOligoceneMiocene — about 0 of 149 occurrences85–83 Mya — about 0.0 occurrences83–81 Mya — about 0.1 occurrences81–79 Mya — about 0.1 occurrences79–76 Mya — about 0.1 occurrences76–74 Mya — about 0.1 occurrences74–72 Mya — about 0.1 occurrences72–70 Mya — about 0.1 occurrences70–68 Mya — about 0.1 occurrences68–66 Mya — about 0.2 occurrences66–64 Mya — about 2 occurrences64–62 Mya — about 2 occurrences62–60 Mya — about 2 occurrences60–58 Mya — about 2 occurrences58–55 Mya — about 8 occurrences55–53 Mya — about 22 occurrences53–51 Mya — about 22 occurrences51–49 Mya — about 22 occurrences49–47 Mya — about 17 occurrences47–45 Mya — about 11 occurrences45–43 Mya — about 11 occurrences43–41 Mya — about 10 occurrences41–39 Mya — about 4 occurrences39–37 Mya — about 4 occurrences37–34 Mya — about 4 occurrences34–32 Mya — about 2 occurrences32–30 Mya — about 1.0 occurrences30–28 Mya — about 1.0 occurrences28–26 Mya — about 1.0 occurrences26–24 Mya — about 1.0 occurrences24–22 Mya — about 0.4 occurrences61.66 Mya33.9 Mya85 Mya22 Mya

149 occurrences of Crommium 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

149 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

31 formations

Flournoy — 43.28°N, 123.08°WFlournoy — 43.26°N, 123.03°WFlournoy — 43.01°N, 123.91°WDelmar — 33.16°N, 117.21°WDelmar — 32.93°N, 117.25°WDelmar — 32.92°N, 117.26°WSelsey — 51.02°N, 1.32°WSelsey — 50.73°N, 0.78°WJuncal — 34.55°N, 118.73°WJuncal — 34.55°N, 118.73°WLodo — 36.60°N, 120.69°WCarbonera — 6.80°N, 73.58°WCarbonera — 8.33°N, 73.67°WSantiago — 33.76°N, 117.77°WSantiago — 33.12°N, 117.25°WPorters Creek — 32.37°N, 88.03°WPorters Creek — 32.08°N, 87.40°WKirkkavak — 39.63°N, 32.29°EGhazij — 30.42°N, 70.51°EMatilija — 34.48°N, 119.30°WEarnley — 51.08°N, 1.17°WLondon Clay — 50.89°N, 1.28°WEwekoro — 6.92°N, 3.19°ETepetate — 24.17°N, 110.00°WLockhart Limestone — 32.43°N, 70.50°ELaki — 25.31°N, 67.90°EKarkar — 8.41°N, 48.48°EBruxellian — 51.17°N, 3.33°ESan Juan — 16.59°N, 92.89°WLisbon — 31.83°N, 88.25°WOiching — 47.92°N, 13.00°ESanta Susana — 34.11°N, 118.57°WGosport Sand — 31.54°N, 87.52°W

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The named rock units Crommium has been recovered from, largest first. Drawn where the rock is now, not where it formed. 7 further formations hold fewer occurrences each and are not listed. 86 occurrences have no formation on record, which is common for older literature.

Crommium and its relatives

Eocene

Where Crommium and its relatives were recorded in the Eocene.

Found in the same rock

1,627 taxa

The Paleobiology Database records 136 sites for Crommium, 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

34 references

Each of the 149 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. 22 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 Crommium

Credit
Hectonichus
Licence
CC BY-SA 3.0
Commercial use
the licence allows it

No 3D scan of Crommium 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 itAmpullospirinae through timeFormations of the EoceneThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. (Cossmann 1888)