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 Apomys hylocetes Mearns 1905 Apomys hylocetes Mearns 1905 , Proc. U. S. Natl. Mus ., 28: 456 . Type Locality: Philippines , Mindanao Isl, Mt Apo, 6000 ft ( 1830 m ). Vernacular Names: Mindanao Mossy Forest Apomys . Synonyms: Apomys petraeus Mearns 1905 . Distribution: Greater Mindanao Faunal Region . Endemic to Mindanao in primary montane forest between 1900 and 2800 m ; probably widespread on high peaks of the island ( Heaney et al., 1998 . Conservation: IUCN – Lower Risk (lc). Discussion: Included within Apomys abrae hylocetes Group by Musser (1982 b ), who also explained why petraeus is a synonym. Standard karyotype (2n = 48, FN = 56) of A. hylocetes is strikingly dissimilar to that of sympatric A. insignis (2n = 36, FN = 36), but this phyletic estimate is contradicted by phylogenetic analyses of mtDNA cytochrome b sequences, which indicates they are sister species and most closely related to an undescribed species from the islands of Leyte and Biliran and an undescribed species on Camiguin Isl ( Steppan et al., 2003 ). An hypothesis explaining the evolutionary origins of these four species is presented by Steppan et al. (2003) .