Three New Species of Musseromys (Muridae, Rodentia), the Endemic Philippine Tree Mouse from Luzon Island Author Heaney, Lawrence R. Author Balete, Danilo S. Author Rickart, Eric A. Author Veluz, Maria Josefa Author Jansa, Sharon A. text American Museum Novitates 2014 2014-05-16 2014 3802 1 1 http://www.bioone.org/doi/abs/10.1206/3802.1 journal article 10.1206/3802.1 0003-0082 5366533 Musseromys anacuao , new species Figures 2 , 3 , 4D, 5D, 6D, 10; tables 2, 3 HOLOTYPE : FMNH 209522 , adult female collected on 1 May 2010 , field number D. S. Balete 7267. Fresh tissues were removed from the thigh and placed in DMSO buffer solution. The rest of the specimen was initially fixed in formalin, now preserved in ethyl alcohol with skull (fig. 6D) removed and cleaned. The dorsoposterior portion of the braincase was damaged by the trap ; the specimen is otherwise in good condition. The holotype is currently housed at FMNH but will be transferred to PNM . TYPE LOCALITY : Philippines : Luzon Island : Aurora Province : Dinalungan Municipality , 0.2 km E Mt. Anacuao peak, 1725 m elevation, 16.25527° N , 121.88896° E (fig. 1) . MEASUREMENTS: Tables 2 and 3 . SPECIMENS EXAMINED ( n = 3). Aurora Province : Dinalungan Municipality , 0.2 km E Mt. Anacuao peak, 1725 m elevation ( FMNH 209522 [ holotype ], 209523, 209524) . ETYMOLOGY: From the name of the mountain where the specimens were obtained, used as a noun in the genitive case. DIAGNOSIS: A member of the genus Musseromys (see Emended Diagnosis and Description, above), of smaller than average size (fig. 10; HBL 74−83 mm ) with a moderately long tail ( 82−86 mm , 99−116% of HBL), hind foot of average length ( 18 mm ) relative to body size (19%−23% of HBL), and moderately short ears ( 15−16 mm ; table 3). The hind foot is broad with proportionately large plantar pads (fig. 4D). The skull (fig. 6D) is small (20.0− 20.7 mm ), with broad lingual breadth of palate at M3 but narrow labial palatal breadth at M1, narrow zygomatic plates, short molar rows and narrow M1, and short nasals and rostrum. The incisive foramina are long, relatively wide, and terminate posteriorly slightly anterior to the anterior