The Sunda shrew (Crocidura monticola ) is a species of mammal in the family Soricidae found in Indonesia and Malaysia. Populations from the Malay Peninsula, Sumatra and Borneo are now considered to belong to Crocidura neglecta The widespread species C. neglecta sensu lato, exhibits high levels of diversity. The divergence among populations from Peninsular Malaysia, west Borneo and north-east Borneo is higher than that among many other recognised related species, suggesting that these might deserve specific status. Species delimitation based on private allele sharing also supports the species-level recognition of these populations and perhaps also that of the Bukit Baka population. However, these have not been described due to lack of morphological evidence and the small number of localities included in species delimitation analyses. An increase in specimen collection and geographic coverage will be needed to characterize the fine-scale distribution of this diversity and resolve the taxonomy of this group.