monotremata defined in 1951 yearmonotremata - monotremata;
monotremata - A sub-class of Mammalia, containing the duckbilled platypus and two genera of spiny anteater. Live in Australia and New Guinea. A very primitive group, only distantly related to all other known mammals: from which they differ in laying eggs, and in possessing many other reptilian features. But have hair and secrete milk. Fossil history unknown.
near monotremata in Knolik
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