M. darwini may refer to:Mallada darwini Masoniella darwini Megalomus darwini Mesocyclops darwini, a copepod crustacean species in the genus Mesocyclops Microdontomerus darwini Minihippus darwini Mycale darwini Myllocerus darwini Mylodon darwini, an extinct giant ground sloth species Mysteria darwini