Elephant shrews (now in the Family Macroscelididae) were originally classified as true shrews due to their obvious physical similarities. However, studies using actual genetic sequences to analyze evolutionary relatedness show that elephant shrews are not closely related to shrews and actually belong to an African lineage which includes aardvarks, manatees, and elephants!

Sketch by Nicole Korzeniecki. Fact by Adrian Perez

Source: Springer, M.S., Cleven, G.C., Madsen, O., de Jong, W.W., Waddell, V.G., Amrine, H.M. and Stanhope, M.J., 1997. Endemic African mammals shake the phylogenetic tree. Nature, 388(6637), pp.61-64.