 Despite the similar dietary habits and methods of consumption to those of an anteater, there is no evidence supporting the idea that echidna-like monotremes have been myrmecophagic (ant or termite-eating) since the Cretaceous.The fossil evidence of invertebrate-feeding bandicoots and rat-kangaroos, from around the time of the platypus–echidna divergence and pre-dating "Tachyglossus", show evidence that echidnas expanded into new ecospace despite competition from marsupials.The genus "Megalibgwilia" is known only from fossils