Cimolodonta is a clade of multituberculate mammals that lived from the Cretaceous to the Eocene. They probably lived something of a rodent-like existence until their ecological niche was assumed by true rodents. The more basal multituberculates are found in a different suborder, "Plagiaulacida", a paraphyletic group containing all non cimolodontan multituberculates.
Cimolodonta is apparently a natural (monophyletic) suborder. Remains have been identified from across the Northern Hemisphere. They first appeared during the Aptian, and completely replaced the more primitive plagiaulacidans by the early Late Cretaceous. The taxon is recognized as the informal "Paracimexomys group" and the superfamilies Djadochtatherioidea, Taeniolabidoidea, and Ptilodontoidea. Additionally, and of uncertain affinities, are the families Cimolomyidae, Boffiidae, Eucosmodontidae, Kogaionidae, Microcosmodontidae and the two genera Uzbekbaatar and Viridomys. More precise placement of these types awaits further discoveries and analysis.
Taxonomy
Suborder †Cimolodonta McKenna, 1975 Superfamily Incertae sedis Family Incertae sedis Subfamily Incertae sedis Genus ?Ameribaatar Eaton & Cifelli, 2001 Genus ?Barbatodon Rãdulescu & Samson, 1986 Genus ?Bryceomys Eaton, 1995 Genus Cedaromys Eaton & Cifelli, 2001 Genus ?Dakotamys Eaton, 1995; (Early Cretaceous, Central North America) Genus ?Fractinus Higgins, 2003 Genus Halodon Marsh, 1889 Genus Koshikibaatar Sera, 2026 Genus Ptilodus (Marsh, 1889) Gidley, 1909 Genus ?Uzbekbaatar Kielan-Jaworowska & Nesov, 1992 "Paracimexomys group" Archibald, 1982 Genus Cimexomys Sloan & Van Valen, 1965 Genus Paracimexomys Archibald, 1982 Family Boffiidae Hahn & Hahn, 1983 Genus Boffius Vianey-Liaud, 1979 Family Cimolomyidae Marsh, 1889 sensu Kielan-Jaworowska & Hurum, 2001 Genus Camurodon Shelley et al., 2026 Genus Buginbaatar Kielan-Jaworowska & Sochava, 1969 Genus Cimolomys Marsh, 1889 (syn. ?Allacodon Marsh, 1889; Meniscoessus; Ptilodus; Selenacodon Marsh, 1889) Genus Essonodon Simpson, 1927 Genus Meniscoessus Cope, 1882 (syn. Dipriodon Marsh, 1889, Tripriodon Marsh, 1889, Selenacodon Marsh, 1889, Halodon Marsh, 1889, Oracodon Marsh, 1889) Superfamily Ptilodontoidea Cope, 1887 sensu McKenna & Bell, 1997 & Kielan-Jaworowska & Hurum, 2001 Family Cimolodontidae Marsh, 1889 sensu Kielan-Jaworowska & Hurum, 2001 Genus Anconodon Jepsen, 1940 Genus Cimolodon Marsh, 1889 (syn. Nanomys Marsh, 1889, Nonomyops Marsh, 1892) Genus Essonodon Simpson, 1927 Genus Liotomus Lemoine, 1882 Genus Neoliotomus Jepsen, 1930 Family Ptilodontidae Cope, 1887 (syn. Ptilodontinae Cope, 1887 sensu McKenna & Bell, 1997) Genus Baiotomeus Krause, 1987 Genus Kimbetohia Simpson, 1936 Genus Prochetodon Jepsen, 1940 Genus Ptilodus Cope, 1881 (Chirox Cope, 1884) Family Neoplagiaulacidae Ameghino, 1890 (syn. Neoplagiaulacinae Ameghino, 1890 sensu McKenna & Bell, 1997) Genus Cernaysia Vianey-Liaud, 1986 Genus Ectypodus Matthew & Cranger, 1921 (syn. Charlesmooria Kühne, 1969) Genus Krauseia Vianey-Liaud, 1986 Genus Mesodma Marsh, 1889 Genus Mesodmops Tong & Wang, 1994 Genus Mimetodon Jepsen, 1940 Genus Neoplagiaulax Lemoine, 1882 Genus Parectypodus Jepsen, 1930 Genus Xanclomys Rigby, 1980 Genus Xyronomys Rigby, 1980 Family Kogaionidae Rãdulescu & Samson, 1996 Genus Barbatodon Rãdulescu & Samson, 1996 Genus Hainina Vianey-Liaud, 1979 Genus Kogaionon Rãdulescu & Samson, 1996 Family Eucosmodontidae Jepsen, 1940 sensu Kielan-Jaworowska & Hurum, 2001 (syn. Eucosmodontinae Jepsen, 1940 sensu McKenna & Bell, 1997) Genus Clemensodon Krause, 1992 Genus Eucosmodon Matthew & Granger, 1921 Genus Stygimys Sloan & Van Valen, 1965 Family Microcosmodontidae Holtzman & Wolberg, 1977 (syn. Microcosmodontinae Holtzman & Wolberg, 1977 McKenna & Bell, 1997) Genus Acheronodon Archibald, 1982 Genus Kaniqsiqcosmodon Shelley et al., 2026 Genus Microcosmodon Jepsen, 1930 Genus Pentacosmodon Jepsen, 1940 Superfamily Djadochtatherioidea Kielan-Jaworowska & Hurum, 1997 sensu Kielan-Jaworowska & Hurum, 2001 (syn. Djadochtatheria Kielan-Jaworowska & Hurum, 1997) Genus ?Bulganbaatar Kielan-Jaworowska, 1974 Genus ?Chulsanbaatar Kielan-Jaworowska, 1974 Genus Nemegtbaatar Kielan-Jaworowska, 1974 Family Sloanbaataridae Kielan-Jaworowska, 1974 Genus Kamptobaatar Kielan-Jaworowska, 1970 Genus Nessovbaatar Kielan-Jaworowska & Hurum, 1997 Genus Sloanbaatar Kielan-Jaworowska, 1974 Family Djadochtatheriidae Kielan-Jaworowska & Hurum, 1997 Genus Catopsbaatar Kielan-Jaworowska, 1974 Genus Djadochtatherium Simpson, 1925 Genus Kryptobaatar Kielan-Jaworowska, 1970 (syn. Gobibaatar Kielan-Jaworowska, 1970, Tugrigbaatar Kielan-Jaworowska & Dashzeveg, 1978) Genus Tombaatar Kielan-Jaworowska, 1974 Genus Qayaqgruk Shelley et al., 2026 Superfamily Taeniolabidoidea Granger & Simpson, 1929 sensu Kielan-Jaworowska & Hurum, 2001 Genus Prionessus Matthew & Granger, 1925 Family Taeniolabididae Granger & Simpson, 1929 Genus Kimbetopsalis Sarah, 2015 Genus Taeniolabis Cope, 1882 Family Lambdopsalidae Chow & Qi, 1978 Genus Lambdopsalis Chow & Qi, 1978 Genus Sphenopsalis Matthew, Granger & Simpson, 1928
References
Further reading Kielan-Jaworowska Z. and Hurum J.H. (2001), "Phylogeny and Systematics of multituberculate mammals". Paleontology 44, p. 389-429. Much of this information has been derived from Multituberculata Cope, 1884.
External links