Cimexomys

Cimexomys is an extinct North American mammal that lived from the Upper Cretaceous to the Paleocene. For a while, it shared the world with dinosaurs, but outlived them. It was a member of the extinct order Multituberculata and lies within the suborder Cimolodonta. It is perhaps a member of the Paracimexomys group, though it is not certain.

Cimexomys

Ghedoghedo · 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
CimolodontaPBDB
Diet
herbivorePBDB, for Multituberculata
Life habit
arborealPBDB, for Multituberculata
Motility
actively mobilePBDB, for Osteichthyes
Environment
terrestrialPBDB, for Mammalia

Time the record covers

At least 17 million years on record.

The record covers at least 83.6 Mya to 66 Mya. No occurrence read is dated outside 85.7 Mya to 63.4 Mya.

Late Cretaceous — about 31 of 56 occurrencesLate CretaceousPaleocene — about 25 of 56 occurrencesPaleocene86–85 Mya — about 0.3 occurrences85–85 Mya — about 0.7 occurrences85–84 Mya — about 0.7 occurrences84–83 Mya — about 1 occurrence83–82 Mya — about 1 occurrence82–82 Mya — about 1 occurrence82–81 Mya — about 1 occurrence81–80 Mya — about 1 occurrence80–79 Mya — about 1 occurrence79–78 Mya — about 1 occurrence78–78 Mya — about 1 occurrence78–77 Mya — about 1 occurrence77–76 Mya — about 1 occurrence76–75 Mya — about 1 occurrence75–75 Mya — about 1 occurrence75–74 Mya — about 1 occurrence74–73 Mya — about 1 occurrence73–72 Mya — about 1 occurrence72–71 Mya — about 1 occurrence71–71 Mya — about 1 occurrence71–70 Mya — about 1 occurrence70–69 Mya — about 1 occurrence69–68 Mya — about 1 occurrence68–68 Mya — about 1 occurrence68–67 Mya — about 1 occurrence67–66 Mya — about 1 occurrence66–65 Mya — about 7 occurrences65–64 Mya — about 7 occurrences64–64 Mya — about 7 occurrences64–63 Mya — about 3 occurrences83.6 Mya66 Mya86.2 Mya62.9 Mya

56 occurrences of Cimexomys 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

56 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

16 formations

Hell Creek — 47.60°N, 107.00°WHell Creek — 47.80°N, 106.10°WLance — 41.57°N, 108.67°WLance — 43.15°N, 104.57°WLance — 43.12°N, 104.64°WLance — 41.57°N, 108.65°WLance — 44.24°N, 109.02°WFort Union — 47.60°N, 107.00°WFort Union — 47.60°N, 106.20°WFort Union — 47.80°N, 106.10°WOldman — 50.78°N, 110.50°WOldman — 49.10°N, 110.94°WOldman — 49.16°N, 110.72°WOldman — 49.08°N, 110.84°WJudith River — 47.81°N, 109.59°WJudith River — 46.10°N, 109.10°WJudith River — 48.93°N, 110.58°WWahweap — 37.60°N, 111.35°WWahweap — 37.56°N, 112.28°WWahweap — 37.59°N, 112.90°WDenver — 39.70°N, 104.70°WDenver — 39.50°N, 104.70°WMilk River — 49.10°N, 111.80°WKaiparowits — 37.40°N, 111.20°WKaiparowits — 37.80°N, 111.50°WAguja — 29.20°N, 103.20°WAguja — 29.10°N, 103.17°WRavenscrag — 49.50°N, 109.20°WFruitland — 36.30°N, 108.20°WKirtland — 36.30°N, 108.20°WFox Hills — 44.50°N, 102.30°WTullock — 47.80°N, 106.10°WBear — 46.20°N, 109.90°W

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The named rock units Cimexomys has been recovered from, largest first. Drawn where the rock is now, not where it formed. 1 occurrence has no formation on record, which is common for older literature.

Cimexomys and its relatives

Late Cretaceous

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

Found in the same rock

496 taxa

The Paleobiology Database records 53 sites for Cimexomys, 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

27 references

Each of the 56 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. 15 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 Cimexomys

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

No 3D scan of Cimexomys 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 itCimolodonta through timeFormations of the Late CretaceousThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. Sloan and Van Valen 1965