Mesodma

Mesodma is an extinct genus of mammal, a member of the extinct order Multituberculata within the suborder Cimolodonta, family Neoplagiaulacidae. It lived during the upper Cretaceous and Paleocene Periods of what is now North America.

Mesodma
Temporal range: 105.3–56.8 Ma
Scientific classification
Kingdom: Animalia
Phylum: Chordata
Class: Mammalia
Order: †Multituberculata
Family: †Neoplagiaulacidae
Genus: †Mesodma
Species
  • M. ambigua
  • M. formosa
  • M. hensleighi
  • M. pygmaea
  • M. senecta
  • M. thompsoni

Species
  • Mesodma ambigua
    • Place: Mantua Lentil, Wyoming (USA)
    • Age: Maastrichtian-Puercan, Upper Cretaceous - Paleocene
    • Weight: about 55 g
  • Mesodma formosa
    • Place: Hell Creek and Frenchman Formation, USA & Canada. This species is possibly also known from Utah.
    • Age: Maastrichtian-Puercan (Upper Cretaceous to the Paleocene).
    • Weight: about 30 g
  • Mesodma hensleighi
  • Mesodma pygmaea
    • Place: Gidley Quarry, Montana, as well as Wyoming and Alberta, Canada
    • Age: Torrejonian-Tiffanian (Middle Paleocene).
    • Weight: about 8 g
  • Mesodma senecta
    • Age: Campanian (Upper Cretaceous)
    • Weight: about 50 g
  • Mesodma thompsoni (=M. garfieldensis)[1]
    • Place: St Mary River Formation & Montana and Wyoming of the USA and Canada
    • Age: Maastrichtian-Puercan, Upper Cretaceous - Paleocene
    • Weight: about 55 g

The species "Mesodma" primaeva from the Judithian of Western Interior of North America was formerly assigned to the genus Mesodma, but subsequently it was made the type species of a separate genus Filikomys.[2]

References
  1. Smith, Stephanie M.; Wilson, Gregory P. (2016). "Species Discrimination of Co-Occurring Small Fossil Mammals: A Case Study of the Cretaceous-Paleogene Multituberculate Genus Mesodma". Journal of Mammalian Evolution. doi:10.1007/s10914-016-9332-2.
  2. Weaver, Lucas N.; Varricchio, David J.; Sargis, Eric J.; Chen, Meng; Freimuth, William J.; Wilson Mantilla, Gregory P. (2020). "Early mammalian social behaviour revealed by multituberculates from a dinosaur nesting site". Nature Ecology & Evolution. 5 (1): 32–37. doi:10.1038/s41559-020-01325-8.
  • Osborn (1891); "A review of the Cretaceous Mammalia". Proc. Acad. Nat. Sci. Phila. 124 - 135.
  • Simpson (1929), "American Mesozoic Mammalia". Mem. Peabody Mus. Nat. Hist. iii (i): p. 1-235.
  • Clemens (1963), "Fossil mammals of the type Lance formation Wyoming. Part I. Introduction and Multituberculata". Univ. Calif. Pub;. Geol. Sci. 48, p. 1-105. (According to Peabody Museum database.)
  • Marsh (1889), "Discovery of Cretaceous Mammalia". Am. J. Sci. (3) xxxviii, p. 177-180.
  • Archibald (1982), A study of Mammalia and geology across the Cretaceous-Tertiary boundary in Garfield County, Montana. Univ. of Calif. Publ. Geol. Sci. 122xvi+, 286pp.
  • Jepsen (1940), "Paleocene faunas of the Polecat Bench formation, Park County, Wyoming". Pro. Amer. Philos. Soc 83, p. 217-341, 21 figs., 5 pls.
  • Kielan-Jaworowska, Z; Hurum, JH (2001). "Phylogeny and Systematics of multituberculate mammals". Palaeontology. 44: 389–429. doi:10.1111/1475-4983.00185.
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