Comprising their class along with Metatheria and Eutheria, for 10 points, name this order of egg-laying mammals which includes platypuses and echidnas.
Members of this taxonomic group lack teeth except as infants and have the ability to sense electric fields using receptors in their snouts. They lack a corpus callosum but have a cloaca, through which oviparous birth occurs. Males have horny spurs on their rear ankles that are sometimes venomous. Females have glands on their abdomens which secrete milk, instead of having nipples. They live only in Australia and New Guinea, and have bones in their jaws and ears marking them as mammals, despite contention. Comprising their class along with Metatheria and Eutheria, for 10 points, name this order of egg-laying mammals which includes platypuses and echidnas.
Members of this taxonomic group lack teeth except as infants and have the ability to sense electric fields using receptors in their snouts.
{monotremata} [or {monotremes}]