(from the article `echidna`) Echidnas constitute the family Tachyglossidae, and their only living relative is the platypus. Together these animals constitute the mammalian order ... Found on http://www.britannica.com/eb/a-z/t/2
tachyglossidae Echidnas (spiny anteater); family containing two or three species of small terrestrial, semifossorial, egg-laying mammals found in Australia and New Guinea. Found on http://www.wordinfo.info/words/index/info/view_unit/2663/3