New Ireland forest rat
Ratus sanila is known only by the discovery of some 7 subfossil fragments of jaw dated to over 3000 years old. The molars of this particular species are broad and have a very complex structure of the cusp. The diastema is also longer than in other species of the genus Rattus suggesting a separate species which may be a relict of an archaic or ancestral dispersal of Rattus stock to New Guinea and Australia. This species probably still survives in some primary forest.
- Wilson, edited by Don E.; Reeder, DeeAnn M. (2005). Mammal species of the world : a taxonomic and geographic reference (3rd ed. ed.). Baltimore: Johns Hopkins University Press. ISBN 0-8018-8221-4.
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