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Temporal range: Middle Jurassic-Late Cretaceous
Scientific classification
Kingdom: Animalia
Phylum: Chordata
Class: Mammalia
Subclass: Theria
Order: Dryolestida
Family: Dryolestidae
Marsh, 1879

Dryolestidae was an abundant and diverse group of Mesozoic mammals. These mammals were different from their relatives by having the following two characteristics:

  • Their upper and lower molars were shortened mesiodistally and widened labiolingually.
  • The anterior root of lower molars were more robust and bigger.

Further reading[edit]

  • Zofia Kielan-Jaworowska, Richard L. Cifelli, and Zhe-Xi Luo, Mammals from the Age of Dinosaurs: Origins, Evolution, and Structure (New York: Columbia University Press, 2004), 380-382.