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Stagodontidae

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Stagodontidae
Temporal range: Late Cretaceous, 83.5–65.5 Ma [1]
Scientific classification
Kingdom:
Phylum:
Class:
Subclass:
Family:
Stagodontidae
Genera

Didelphodon
Eodelphis

Stagodontidae is an extinct family of carnivorous metatherian mammals that inhabited North America during the late Cretaceous. Currently, the family includes two genera, Eodelphis and Didelphodon, which together include some five different species.[1] Other extinct mammals, such as Pariadens, were once considered members of this family, but this is no longer the case. Stagodontids were some of the largest known Cretaceous mammals, ranging from 0.4 to 2.0 kilograms (0.88–4.41 lb) in mass.[2] One of the most unusual features of stagodontids are their robust, bulbous premolars, which are thought to have been used to crush freshwater mollusks.[3] Postcranial remains suggest that stagodontids were most likely semi-aquatic.[4] Stagodontids were once thought to be closely related to the Sparassodonta, but later studies suggest they belong to a more ancient branch of the metatherian family tree, possibly closely related to pediomyids.[5][6] Stagodontids are last known from the Maastrictian, and are thought to have gone extinct in the K-T Extinction.

  • Family Stagodontidae[1]
    • Genus Didelphodon
      • Didelphodon coyi
      • Didelphodon padanicus
      • Didelphodon vorax
    • Genus Eodelphis
      • Eodelphis browni
      • Eodelphis cutleri

References

  1. ^ a b c Fox, Richard C. (2003). "Stagodontid marsupials from the late Cretaceous of Canada and their systematic and functional implications". Acta Palaeontologica Polonica. 51 (1): 13–36. {{cite journal}}: Unknown parameter |coauthors= ignored (|author= suggested) (help)
  2. ^ Gordon, Cynthia L. (2003). "A First Look at Estimating Body Size in Dentally Conservative Marsupials". Journal of Mammalian Evolution. 10: 1–21. doi:10.1023/A:1025545023221.
  3. ^ Lofgren, Donald L. (1992). "Upper premolar configuration of Didelphodon vorax (Mammalia, Marsupialia, Stagodontidae)". Journal of Paleontology. 66: 162–164.
  4. ^ "Didelphodon vorax". www.rmdrc.com. Rocky Mountain Dinosaur Resource Center. December 7, 2010. Retrieved 5 December 2013.
  5. ^ Marshall, Larry G. (1990). "Phylogenetic Relationships of the Families of Marsupials". Current Mammalogy. 2: 433–505. {{cite journal}}: Unknown parameter |coauthors= ignored (|author= suggested) (help)
  6. ^ Forasiepi, Analía M. (2009). "Osteology of Arctodictis sinclairi (Mammalia, Metatheria, Sparassodonta) and phylogeny of Cenozoic metatherian carnivores from South America". Monografías del Museo Argentino de Ciencias Naturales. 6: 1–174.