This list includes extant mammal species discovered, formally named, or brought to public light in 2000 or later.
[1] Strictly speaking, this is not a newly discovered species, but simply an alternative taxonomic treatment, as cyclotis was already recognized, but only as a subspecies.
The pygmy three-toed sloth (Bradypus pygmaeus) was named in 2001, after its discovery in the mangrove swamps of Isla Escudo de Veraguas, a tiny island off the western coast of Panama.
[2] 36 primate species were described in the 2000s including the golden palace monkey or Madidi titi, named by auction.
Notable among those described since 2000 are the Cypriot mouse (Mus cypriacus), and the Laotian rock rat (Laonastes aenigmamus), which represents a family, Diatomyidae, thought to be extinct since the Miocene, and has been described as a living fossil.