Necromys punctulatus is known from a single specimen in the Natural History Museum, London which was originally collected by the British zoologist
Louis Fraser in Ecuador between 1857 and 1859. For a long time this was thought to be a subspecies of the short-tailed cane mouse (
Zygodontomys brevicauda) but in 1991, the American zoologist Robert S. Voss examined the type specimen and came to the conclusion that it had many features in common with the
hairy-tailed bolo mouse (
Necromys lasiurus), then classified as
Bolomys lasiurus, and placed it in the same genus, as
Bolomys punctata. Both have since been transferred to the new genus
Necromys. ==Description==