The Togo Mouse , also known as BÃ 1\/4 ttner 's African Forest Mouse or the Groove-toothed Forest Mouse ( Leimacomys buettneri ) , is a unique muroid rodent . It is known from only two specimens , which were taken near the type locality of Bismarckburg , near Yege , Togo in 1890 . The Togo Mouse , also known as BÃ 1\/4 ttner 's African Forest Mouse or the Groove-toothed Forest Mouse ( Leimacomys buettneri ) , is a unique muroid rodent known from only two specimens taken from near the type locality of Bismarckburg , near Yege , Togo in 1890 .