Amuyao tree-mouse

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Amuyao tree-mouse
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Mammalia
Order: Rodentia
Family: Muridae
Genus: Musseromys
M. inopinatus
Binomial name
Musseromys inopinatus
Heaney, Balete, Rickart, Veluz & Jansa, 2014[2]

The Amuyao tree-mouse (Musseromys inopinatus)[3] is a species of rodent in the family Muridae.[1] It is found on Mount Amuyao in Luzon, Philippines.[1][2]


As for all members of the genus Musseromys, they are small murids weighing between 15 and 22 grams.[2] They have tails (82 - 101 mm) usually longer than the rest of their bodies (74 - 84 mm).[2]

Two adult specimens were collected, now in the collections of the Field Museum of Natural History (FMNH):

  • an adult male (♂) (FMNH 193839, holotype)
  • an adult female (♀) (FMNH 193840).[2]

Their measurements are as follows :

Measurements of the holotype (adult ♂) and 1 other specimen (adult ♀) of Musseromys inopinatus[2]
Attribute FMNH 193839 (♂, holotype) FMNH 193840 (♀)
Head-body length (mm) 78 78
Tail length (mm) 88 85
Weight (g) 19.5 17


Data on this species endemic to the Philippines is, as of now, known from only one location.[2] This particularity, alongside a lack of knowledge on the repartition and abundance of the species, brought the IUCN to assess the Amuyao tree-mouse as "Data Deficient".[1]


  1. ^ a b c d Dando, T.; Kennerly, R. (2019). "Musseromys inopinatus". IUCN Red List of Threatened Species. 2019: e.T112042008A112042012. doi:10.2305/IUCN.UK.2019-1.RLTS.T112042008A112042012.en.
  2. ^ a b c d e f g Heaney, Lawrence R.; Balete, Danilo S.; Rickart, Eric A.; Veluz, Maria Josefa; Jansa, Sharon A. (16 May 2014). "Three New Species of Musseromys (Muridae, Rodentia), the Endemic Philippine Tree Mouse from Luzon Island". American Museum Novitates (3802): 1–27. doi:10.1206/3802.1. S2CID 53542249. Retrieved 8 February 2023.
  3. ^ "Musseromys inopinatus (id=1003437)". ASM Mammal Diversity Database. American Society of Mammalogists. Retrieved 8 February 2023.