Belongs within: Multituberculata.
Contains: Ptilodontoidea.
The Cimolodonta are a group of multituberculate mammals known from the Early Cretaceous to the Eocene, including all multituberculates to survive the end of the Cretaceous (Kielan-Jaworowska & Hurum 2001).
Characters (from Kielan-Jaworowska & Hurum 2001): Enamel prismatic; dental formula 2.0.1–4.2/1.0.1–2.2; I1 absent, I2 single- or two-cusped, I3 small, single-cusped; p1 and p2 absent, p3, if present, peg-like, non-functional; p4 primitively arcuate with oblique ridges, single or no posterobuccal cusp present.
Cimolodonta [Boffiini]
|–Barbatodon Râdulescu & Samson 1986 K-JH01
|–Dakotamys Eaton 1995 K-JH01
| `–D. malcolmi K-JH01
|–Bryceomys Eaton 1995 K-JH01
| `–B. fumosus K-JH01
|–Paracimexomys Archibald 1982 K-JH01
| |–P. crossi K-JH01
| `–P. robinsoni K-JH01
|–Cimexomys Sloan & van Valen 1965 K-JH0
| |–C. antiquus D07
| |–C. gratus D07
| |–C. gregoryi D07
| |–C. hausoi D07
| |–C. judithae K-JH01
| |–C. magnus D07
| `–C. minor D07
`–+–Boffius Vianey-Liaud 1979 [Boffiidae] K-JH01
|–Ptilodontoidea K-JH01
`–Taeniolabidoidea K-JH97
|–Cimolomyidae K-JH01
| |–Meniscoessus Cope 1882 K-JH01
| |–Cimolomys Marsh 1889 K-JH01
| |–Essonodon Simpson 1927 K-JH01
| `–Buginbaatar Kielan-Jaworowska & Sochava 1969 [Buginbaatarinae] K-JH01
| `–B. transaltaiensis Kielan-Jaworowska & Sochava 1969 K-JH97
`–+–Djadochtatherioidea K-JH01
|–Kogaionidae K-JH01
| |–Hainina Vianey-Liaud 1979 K-JH01
| `–Kogaionon Râdulescu & Samson 1996 K-JH01
|–Eucosmodontidae K-JH01
| |–Eucosmodon Matthew & Granger 1921 K-JH01
| |–Stygimys Sloan & van Valen 1965 K-JH01
| `–Clemensodon Krause 1992 K-JH01
|–Microcosmodontidae K-JH01
| |–Microcosmodon Jepsen 1930 K-JH01
| |–Pentacosmodon Jepsen 1940 K-JH01
| `–Acheronodon Archibald 1982 K-JH01
`–Taeniolabididae K-JH01
|–Prionessus Matthew & Granger 1925 K-JH01
|–Sphenopsalis Matthew, Granger & Simpson 1928 K-JH01
|–Lambdopsalis Chow & Qi 1978 K-JH01
| `–L. bulla K-JH97
|–Catopsalis Cope 1882 K-JH01
| `–C. joyneri K-JH01
`–Taeniolabis Cope 1882 K-JH01
|–T. lamberti D07
|–T. sulcatus D07
`–T. taoensis K-JH97
*Type species of generic name indicated
REFERENCES
[D07] Dixon, D. 2007. The Complete Illustrated Encyclopedia of Dinosaurs & Prehistoric Creatures. Hermes House: London.
[K-JH97] Kielan-Jaworowska, Z., & J. H. Hurum. 1997. Djadochtatheria – a new suborder of multituberculate mammals. Acta Palaeontologica Polonica 42 (2): 201–242.
[K-JH01] Kielan-Jaworowska, Z., & J. H. Hurum. 2001. Phylogeny and systematics of multituberculate mammals. Palaeontology 44 (3): 389–429.