Dryolestida

Dryolestida
Dryolestida
Temporal range: Jurassic-Tertiary Bathonian–Paleocene
Scientific classification
Kingdom: Animalia
Phylum: Chordata
Class: Mammalia
(unranked): Holotheria
Subclass: Theriiformes
(unranked): Trechnotheria
Superorder: Dryolestoidea
Order: Dryolestida
Prothero, 1981
Families & Genera

See text

Dryolestida is an extinct order of mammals known from the Jurassic to Tertiary. It has been suggested that these mammals are either the possible ancestors of therian mammals or an offshoot from the same evolutionary line. It is also believed that they developed a fully mammalian jaw and also had the three middle ear bones. Other than that, not much is known about them, this is because their fossils are made up mostly of jaw and tooth remains.

The Dryolestids were formerly considered part of Pantotheria and/or Eupantotheria. The clade Quirogatheria, erected by José Bonaparte in 1992, is often used as a synonym for Dryolestida. Originally, Quirogatheria was meant to include Brandoniidae, but this family is now included with the Dryolestids.

Contents

Classification

Classification modified after Rougier & Gaetano, 2011.[1]

  • Dryolestidae
  • †Paurodontidae
  • †Meridiolestida
    • Cronopio
    • Leonardus
    • †Austrotriconodontidae
      • Austrotriconodon
    • †Brandoniidae
      • Brandonia
      • Alamitherium
      • Barberenia
      • Casamiquelia
      • Rougiertherium
    • †Donodontidae
    • †Mesungulatoidea
      • †Mesungulatidae
      • †Peligrotheriidae
      • †Reigitheriidae
        • Reigitherium

References

External links

Further reading

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), 14, 379-393.

The Illustrated Encyclopedia of the Prehistoric World page 344.


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