Tetraclaenodon
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- Higgins, P, 2003, a Wyoming Succession of Paleocene Mammal
- Geological Survey
- A New Didolodontid Mammal from the Late Paleocene–Earliest Eocene of Laguna Umayo, Peru
- The Enigmatic Evolutionary Relationships of Paleocene Mammals and Their Relevance for the Tertiary Radiation of Placental Mammals
- Vol.4, No.2, 45-80, L. Van Valen, the Beginning of the Age of Mammals