This species was described by Robert Fisher Tomes, an English zoologist, in 1862.[2] In 1955, Emmett T. Hooper, an American zoologist, would lump this species with Neotoma mexicana, arguing that the two species were too similar where their respective ranges met.[3] The two species would be considered loosely the same species until 2014, when a revision of the mexicana species group (at the time only containing Neotoma mexicana and Neotoma chrysomelas). This study found N. ferruginea & Neotoma picta to be distinct species, with the former having several subspecies.[4] An additional study in 2021 referred more subspecies to this species, and showed N. ferruginea to be the sister species to N. picta from southern Mexico.[5]
There are seven subspecies:
Neotoma ferruginea ferruginea
Neotoma ferruginea chamula
Neotoma ferruginea isthmica
Neotoma ferruginea parvidens
Neotoma ferruginea solitaria (but see below)
Neotoma ferruginea tropicalis
Neotoma ferruginea vulcani
Molecular work has been done on all the subspecies except Neotoma ferruginea solitaria, but it is likely a subspecies of ferruginea given its range being so far removed from other Neotoma species.[5]
This is a relatively large cricetid, with a body length of 165 mm (6.5 in) and a tail length of 152 mm (6.0 in). They have an orange-brown color throughout their upperparts, brighter on the sides in most subspecies, with a bright white underside. The base of the hairs are dark.[6] The whiskers are nearly as long as the head. The hind feet are much wider and longer than the forefeet. The tail is black, with relatively long hairs and more hairs near the tip of the tail than along its length.[2]
^Hooper, Emmet T. (31 March 1955). "Notes on Mammals of Western Mexico". Occasional Papers of the Museum of Zoology University of Michigan (565): 21–22. Retrieved 7 January 2025.