What is "mastomys"

Mastomys is a genus of rodent in the family Muridae. It contains these species:

• Awash multimammate mouse or Awash mastomys (M. awashensis)
• Southern multimammate mouse (M. coucha)
• Guinea multimammate mouse (M. erythroleucus)
• Hubert's multimammate mouse (M. huberti)
• Verheyen's multimammate mouse (M. kollmannspergeri)
• Natal multimammate mouse (M. natalensis)
• Dwarf multimammate mouse (M. pernanus)
• Shortridge's multimammate mouse (M. shortridgei)