sentences:  Within this division, "Rhynchomys" is most closely related to the other Philippine shrew-rats in the genera "Archboldomys" and "Chrotomys".From 1895 until 1981, "Rhynchomys" was only known from a few specimens taken from near the type locality of "R. soricoides".In 1981, this was expanded by one species with the discovery and description of "R. isarogensis".