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Prototheria

(Monotremes)


Ex. platypus, spiny anteater

Metatheria

(Marsupials)



Ex. Kangaroos, opossums

Eutheria

(Placentals)



Everything else

Homologies

Similarities between organisms based on ancestral descent

Analogies

Similarities between organisms based on shared function. No evolutionary descent.

Brachiation

Arm swinging.



Ex. Gibbon

Strepsirhini

Includes lemurs and lorises.

L and L monkeys

Haplorhini

Includes tarsiers, monkeys, apes, and humans.