Superkingdom Eukaryota
Kingdom Animalia
Phylum Chordata
Subphylum Verterbrata
Class Mammalia
Order Rodentia

The largest order of mammals, having 34 families, about 389 genera, and more than 2000 species.  Rodents are recognizable from their paired large incisors.   The families are classified primarily by the forms of these incisors, as well as their jaws.

Notice that rabbits are not rodents; they belong to their own order, Lagomorpha.

Moles and Hedgehogs can be found in order Insectivora.

In the list of families below, I have placed each family's approximate number of genera and species in parentheses after the family name (#genera, #species)

Suborder Sciurognatha

 Suborder Hystricognatha
  • Infraorder Caviomorpha
  • Infraorder Hystricomorpha
  • Infraorder Phiomorpha

  • Mammals of Ohio

    Tree of life web project

    Animals on the net

    Marc Robinson, Diversite des Modes D'evolution des Genomes de Rongeurs, (Ph.D. dissertation), page 15

    Dr. George Atkins, GWU, Mammalian Order Rodentia

    Ro*den"ti*a (?), n. pl. [NL. See Rodent, a.] Zool.

    An order of mammals having two (rarely four) large incisor teeth in each jaw, distant from the molar teeth. The rats, squirrels, rabbits, marmots, and beavers belong to this order.

    ⇒ The incisor teeth are long, curved, and strongly enameled on the outside, so as to keep a cutting edge. They have a persistent pulp and grow continuously.


    © Webster 1913.

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