Maxomys rajah (Thomas 1894) [Maxomys] rajah (Thomas 1894), Ann. Mag. Nat. Hist., ser. 6, 14: 451. Type Locality: Malaysia, Sarawak (N Borneo), Gunung Batu Song. Vernacular Names: Rajah Sundaic Maxomys. Synonyms: Maxomys hidongis (Kloss 1921); Maxomys lingensis (Miller 1900); Maxomys pellax (Miller 1900); Maxomys similis (Robinson and Kloss 1916). Distribution: Endemic to the Sunda Shelf; Peninsular Thailand south of Isthmus of Kra, Malay Peninsula, Riau Arch., Sumatra, amd Borneo; absent from Java and Bali. Conservation: IUCN – Lower Risk (lc). Discussion: Insular distribution similar in broad outline to that of M. whiteheadi. Once regarded as conspecific with M. surifer (Ellerman and Morrison-Scott, 1951; Misonne, 1969), but occurs sympatrically with that species, and although samples of each are regularly misidentified, the two differ in a suite of morphological, ecological, behavioral, and biochemical traits, as well as albumin immunology (Chan et al., 1979; Corbet and Hill, 1992; Musser et al., 1979; Yong, 1972; Watts and Baverstock, 1994 b).

Published as part of Wilson, Don E. & Reeder, DeeAnn, 2005, Order Rodentia - Family Muridae, pp. 1189-1531 in Mammal Species of the World: a Taxonomic and Geographic Reference (3 rd Edition), Volume 2, Baltimore :The Johns Hopkins University Press on page 1371, DOI: 10.5281/zenodo.7316535