the most primitive mammals comprising the only extant members of the subclass Prototheria | any of several tropical American mammals of the family Myrmecophagidae which lack teeth and feed on ants and termites |
| nocturnal burrowing mammal of the grasslands of Africa that feeds on termites; sole extant representative of the order Tubulidentata |
| a burrowing monotreme mammal covered with spines and having a long snout and claws for hunting ants and termites; native to Australia |
| a burrowing monotreme mammal covered with spines and having a long snout and claws for hunting ants and termites; native to New Guinea |
| toothless mammal of southern Africa and Asia having a body covered with horny scales and a long snout for feeding on ants and termites |
| small Australian marsupial having long snout and strong claws for feeding on termites; nearly extinct |