Cimolomys gracilis

via iDigBio · CC0 · 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
- CimolomysPBDB
- Diet
- herbivorePBDB, for Multituberculata
- Life habit
- arborealPBDB, for Multituberculata
- Motility
- actively mobilePBDB, for Osteichthyes
- Environment
- terrestrialPBDB, for Mammalia
Time the record covers
At most 6.2 million years on record.
Every occurrence read is dated to somewhere between 72.2 Mya and 66 Mya, and nothing in the dating separates them, so that window is what the record shows rather than a span.
32 occurrences of Cimolomys gracilis 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
32 occurrences- Late Cretaceous100%
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
6 formations
- Lance Formation19
- Hell Creek Formation · Montana Group7
- Frenchman Formation2
- Scollard Formation2
- St. Mary River Formation1
- Fox Hills Formation · Montana Group1
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The named rock units Cimolomys gracilis has been recovered from, largest first. Drawn where the rock is now, not where it formed.
Cimolomys gracilis and its relatives
Late CretaceousWhere Cimolomys gracilis and its relatives were recorded in the Late Cretaceous.
Found in the same rock
296 taxa- Meniscoessus robustus25 sites
- Cimolodon nitidus24 sites
- Didelphodon vorax20 sites
- Gypsonictops hypoconus17 sites
- Mesodma thompsoni15 sites
- Pediomys elegans15 sites
- Protolambda hatcheri15 sites
- Lepisosteus occidentalis13 sites
- Scapherpeton tectum13 sites
- Borealosuchus sternbergii11 sites
- Brachychampsa montana11 sites
- Champsosaurus11 sites
- Cimolestes incisus11 sites
- Mesodma formosa11 sites
- Myledaphus bipartitus11 sites
- Protolambda florencae11 sites
- Chamops segnis10 sites
- Habrosaurus dilatus10 sites
- Theropoda10 sites
- Trionychidae10 sites
- Alphadon marshi9 sites
- Chelydridae9 sites
- Leptalestes cooki9 sites
- Leptalestes krejcii9 sites
The Paleobiology Database records 30 sites for Cimolomys gracilis, 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
14 references- Fossil mammals of the type Lance Formation, Wyoming. Part I. Introduction and Marsupialia8
- The mammals and horned dinosaurs of the Lance Formation of Niobrara County, Wyoming8
- A study of Mammalia and geology across the Cretaceous-Tertiary boundary in Garfield County, Montana4
- Latest Cretaceous mammals of upper part of Edmonton Formation of Alberta, Canada, and review of marsupial-placental dichotomy in mammalian evolution2
- The mammals of the Gryde Local Fauna, Frenchman Formation (Maastrichtian: Lancian), Saskatchewan1
- The Wounded Knee local fauna and mammalian evolution near the Cretaceous-Tertiary boundary, Saskatchewan, Canada1
- Fossil mammals from the "Mesaverde" Formation (Late Cretaceous, Judithian) of the Bighorn and Wind River basins, Wyoming, with definitions of Late Cretaceous North American Land-Mammal "Ages"1
- Mammal evolution near the Cretaceous-Tertiary Boundary1
- Late Cretaceous mammals of western South Dakota, 19741
- Early Cenozoic mammalian faunas of the Clark's Fork Basin-Polecat Bench area, northwestern Wyoming1
- Waage, 19681
- Cretaceous mammals from Montana1
Each of the 32 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. 2 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 Cimolomys gracilis
- Source
- iDigBio
- Credit
- via iDigBio
- Licence
- CC0
- Commercial use
- the licence allows it
No 3D scan was found. Smithsonian Open Access, MorphoSource and Sketchfab were all searched.
This is what the site found, which is not the same as what exists.
Keep going
What may have been alongside itCimolomys through timeFormations of the Late CretaceousThe world it lived on
Occurrence data from the Paleobiology Database, CC BY 4.0. (Marsh 1889)