Cimolodon

Cimolodon
Temporal range:
Premolar of Cimolodon nitidus, view from the outside
Scientific classification Edit this classification
Kingdom: Animalia
Phylum: Chordata
Class: Mammalia
Order: †Multituberculata
Family: †Cimolodontidae
Genus: †Cimolodon
Marsh, 1889
Species
  • C. akersteni Weaver et al., 2019
  • C. desosai Wilson Mantilla et al., 2026
  • C. electus Fox, 1971
  • C. nitidus Marsh, 1889 (type)
  • C. parvus Marsh, 1892
  • C. peregrinus Donohue, Wilson & Breithaupt, 2013[1]
  • C. similis Fox, 1971
  • C. wardi Eaton, 2006

Cimolodon is an extinct genus of cimolodontid mammal in the order Multituberculata. Specimens are known from the Late Cretaceous of North America.

Taxonomy

The genus Cimolodon was named by Othniel Charles Marsh in 1889. Kielan-Jaworowska & Hurum (2001) noted that Cimolodon seems to be more closely related to members of their "Paracimexomys" group than to other ptilodontoideans.[2]

Species

Cimolodon electus (Fox R.C. 1971) is known from the Upper Cretaceous of the Upper Milk River Formation in Alberta, Canada. Possible finds have been reported from New Mexico.[3]

Cimolodon nitidus (Marsh O.C. 1889) is known from Late Cretaceous strata of the Lance Formation of Wyoming, Utah, Montana and South Dakota (United States) as well as Alberta and Saskatchewan (Canada). Synonyms include Allacodon lentus (Marsh, 1889); Allacodon rarus (Marsh, 1892); Cimolomys bellus (Marsh, 1889); Cimolomys digona (Marsh, 1899); Cimolomys nitidus; Halodon serratus (Marsh, 1889); Nanomyops minitus (Marsh, 1892); Nanomys minitus (Marsh, 1889); and Ptilodus serratus (Gidley, 1909). Cimolodon parvus (Marsh O.C. 1892) is also known from the Upper Cretaceous Lance Formation of Wyoming.[4][5] A specimen referred to as C. cf. nitidus has been recovered from the Prince Creek Formation.[6]

Cimolodon similis (Fox R.C. 1971) is known from the Late Cretaceous (Santonian-early Campanian) of Alberta and Utah.[7][8] C. wardi is known from the Wahweap Formation of Utah.[9]

Cimolodon akersteni is known from the Cenomanian-age Wayan Formation of Idaho.[10]

Cimolodon desosai is known from specimen IGM 14691, a partial skull and mandible, in addition to part of the ulna, femur, and vertebrae. These remains were found in the Campanian-aged El Gallo Formation (El Disecado Member) of Baja California, Mexico.[11]

References

  1. ^ S. L. Donohue, G. P. Wilson, and B. H. Breithaupt. 2013. "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 Interior". Journal of Vertebrate Paleontology 33(3):677-695
  2. ^ Kielan-Jaworowska Z. & Hurum J.H. (2001). "Phylogeny and Systematics of multituberculate mammals". Paleontology 44, p. 389-429.
  3. ^ L. J. Flynn. 1986. "Late Cretaceous mammal horizons from the San Juan Basin, New Mexico". American Museum Novitates 2845:1-30
  4. ^ Marsh (1889), "Discovery of Cretaceous Mammalia." Am. J. Sci. (3), 38, p. 177-180.
  5. ^ Marsh (1892), "Discovery of Cretaceous Mammalia. Pt. III." Am. J. Sci. (3) xliii, p. 249-262.
  6. ^ Thurston, D.K.; Fujita, K. (1994). 1992 Proceedings, International Conference on Arctic Margins. Anchorage, Alaska: U.S. Dept. of the Interior, Minerals Management Service, Alaska Outer Continental Shelf Region. ISBN 978-1-125-44803-8.
  7. ^ Fox (1971), Early Campanian multituberculates (Mammalia: Allotheria) from the upper Milk River Formation, Alberta. Canadian Journal of Earth Sci 8: 916.
  8. ^ J. G. Eaton, S. Diem, J. D. Archibald, C. Schierup, and H. Munk. 1999. "Vertebrate paleontology of the Upper Cretaceous rocks of the Markagunt Plateau, southwestern Utah". In D. D. Gillette (ed.), Vertebrate Paleontology in Utah, Utah Geological Survey Miscellaneous Publication 99-1:323-333
  9. ^ J. G. Eaton. 2006. Late Cretaceous mammals from Cedar Canyon, southwestern Utah. Late Cretaceous Vertebrates from the Western Interior. New Mexico Museum of Natural History and Science Bulletin 35:373-402
  10. ^ Weaver, Lucas N.; Wilson, Gregory P.; Krumenacker, L. J.; McLaughlin, Kayla; Moore, Jason R.; Varricchio, David J. (2019). "New multituberculate mammals from the mid-Cretaceous (lower Cenomanian) Wayan Formation of southeastern Idaho and implications for the early evolution of Cimolodonta". Journal of Vertebrate Paleontology. 39 (2) e1604532. Bibcode:2019JVPal..39E4532W. doi:10.1080/02724634.2019.1604532. S2CID 196655261.
  11. ^ Wilson Mantilla, G. P.; Newbins, I. R.; Fastovsky, D. E.; Zhang, Y.; Montellano-Ballesteros, M.; García Alcántara, D.; Chen, M. (2026). "Cranial and postcranial remains of a new species of Cimolodon (Mammalia, Multituberculata, Cimolodontidae) from the Upper Cretaceous (Campanian) El Gallo Formation of Baja California, México". Journal of Vertebrate Paleontology e2641109. doi:10.1080/02724634.2026.2641109.

Further reading

  • Simpson (1929), "American Mesozoic Mammalia." Mem. Peabody Mus. Nat. Hist. iii (i), p. 1-235.
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