Class Mammalia Linnaeus, 1758 - mammals Order Paucituberculata Ameghino, 1894 Family Caenolestidae Trouessart, 1898 - "shrew" opossums 1 Genus Caenolestes Thomas, 1895 - common "shrew" opossums 2 Genus Lestoros Oehser, 1934 3 Genus Rhyncholestes Osgood, 1924 - Chilean "shrew" opossums