Order Rodentia - Family Muridae Author Wilson, Don E. Author Reeder, DeeAnn text 2005 The Johns Hopkins University Press Baltimore Mammal Species of the World: a Taxonomic and Geographic Reference (3 rd Edition), Volume 2 1189 1531 book chapter 0-8018-8221-4 10.5281/zenodo.7316535 Batomys russatus Musser, Heaney, and Tabaranza, Jr. 1998 Batomys russatus Musser, Heaney, and Tabaranza, Jr. 1998 , Am. Mus . Novit., 3237: 34 . Type Locality: Philippines , Dinagat Isl ( Surigao del Norte Province ), Plaridel Municipality, Libjo (=Albor). Vernacular Names: Russet Batomys . Distribution: Greater Mindanao Faunal Region . Endemic to Dinagat Isl in lowland tropical evergreen rainforest. Discussion: Sympatric with B. salomonseni . Unique among all species of living Murinae in retaining a complete cephalic arterial pattern (the primitive configuration for muroid rodents) as indicated by the presence of a sphenofrontal foramen, squamosal-alisphenoid groove, large stapedial foramen, and groove scoring ventral surface of posterolateral pterygoid plate ( Musser et al., 1998 a ). Batomys russatus is part of a small cluster of mammals endemic to Dinagat (which includes Crateromys australis and Podogymnura aureospinula ).