Mastomys natalensis, aka the natal multimammate mouse
Kelly, et al
CC BY 3.0
<a rel="nofollow" class="external free" href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3562201/">https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3562201/</a>