Skin shedding and ear regrowth
Seifert and colleagues reported the first skin autotomy in mammals; African spiny mice regrew hair follicles and fully regenerated ear holes including cartilage.
As reported in: Seifert, Kiama, Seifert et al. (2012). Skin shedding and tissue regeneration in African spiny mice (Acomys). Nature. doi:10.1038/nature11499