Cimolomyidae
Cimolomyidae is a family of fossil mammals within the extinct order Multituberculata. Representatives are known from the Late Cretaceous of North America and Mongolia, from the late Santonian to their extinction at the end of the Maastrichtian. The family is part of the suborder Cimolodonta. Other than that, their systematic relationships are hard to define. Some authors have placed the taxon within Taeniolabidoidea. Kielan-Jaworowska and Hurum (2001) expressly don't.

Uncredited · CC0 · 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 11 million years on record.
The record covers at least 83.6 Mya to 72.2 Mya. No occurrence read is dated outside 85.7 Mya to 66 Mya.
295 occurrences of Cimolomyidae 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
295 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
29 formations
- Hell Creek Formation · Montana Group92
- Lance Formation79
- Judith River Formation · Montana Group19
- Oldman Formation · Belly River Group17
- Wahweap Formation10
- Mesaverde Formation9
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The named rock units Cimolomyidae has been recovered from, largest first. Drawn where the rock is now, not where it formed. 5 further formations hold fewer occurrences each and are not listed. 5 occurrences have no formation on record, which is common for older literature.
Cimolomyidae and its relatives
Late CretaceousWhere Cimolomyidae and its relatives were recorded in the Late Cretaceous.
Found in the same rock
720 taxa- Meniscoessus robustus97 sites
- Cimolodon nitidus55 sites
- Myledaphus bipartitus53 sites
- Ceratopsidae50 sites
- Scapherpeton tectum49 sites
- Didelphodon vorax47 sites
- Hadrosauridae47 sites
- Lepisosteus occidentalis46 sites
- Trionychidae46 sites
- Paronychodon43 sites
- Champsosaurus42 sites
- Baenidae37 sites
- Brachychampsa montana35 sites
- Mesodma thompsoni35 sites
- Opisthotriton kayi35 sites
- Theropoda35 sites
- Anura34 sites
- Borealosuchus sternbergii34 sites
- Protolambda hatcheri34 sites
- Mesodma33 sites
- Tyrannosauridae32 sites
- Lonchidion selachos31 sites
- Multituberculata31 sites
- Chelydridae30 sites
The Paleobiology Database records 186 sites for Cimolomyidae, 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
69 references- The mammals and horned dinosaurs of the Lance Formation of Niobrara County, Wyoming38
- Fossil mammals of the type Lance Formation, Wyoming. Part I. Introduction and Marsupialia25
- A study of Mammalia and geology across the Cretaceous-Tertiary boundary in Garfield County, Montana23
- Vertebrate palaeocommunities of the lower Judith River Group (Campanian) of southeastern Alberta, Canada, as interpreted from vertebrate microfossil assemblages16
- The Bug Creek problem and the Cretaceous-Tertiary transition at McGuire Creek, Montana16
- Vertebrate biostratigraphy of the Hell Creek Formation in southwestern North Dakota and northwestern South Dakota14
- Mammalian fauna of the Judith River Formation (Late Cretaceous, Judithian), northcentral Montana12
- 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"12
- Latest Cretaceous multituberculates of the Black Butte Station local fauna (Lance Formation, southwestern Wyoming), with implications for compositional differences among mammalian local faunas of the Western Interior11
- Preliminary report on Late Cretaceous mammals of the Kaiparowits Plateau, southern Utah9
- Synonymies and reidentifications of North American fossil mammals8
- Late Cretaceous mammal horizons from the San Juan Basin, New Mexico6
Each of the 295 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. 57 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 Cimolomyidae
- Source
- Wikipedia/Commons
- Credit
- nobody named on the record
- Licence
- CC0
- Commercial use
- the licence allows it
No 3D scan of Cimolomyidae 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.
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