Reithrodontomys microdon, Merriam, 1901

Don E. Wilson, Russell A. Mittermeier & Thomas E. Lacher, Jr, 2017, Cricetidae, Handbook of the Mammals of the World – Volume 7 Rodents II, Barcelona: Lynx Edicions, pp. 204-535 : 369

226.

Small-toothed Harvest Mouse

Reithrodontomys microdon

French: Souris-moissonneuse a petites dents / German: Kleinzahn-Erntemaus / Spanish: Raton espiguero de dientes pequenos

Taxonomy. Reithrodontomys microdon Merriam, 1901 , “Todos Santos, Guatemala (altitude 10,000 ft. [= 3048 m]).”

Reithrodontomys microdon is in subgenus Aporodon. Three subspecies recognized.

Subspecies and Distribution.

R.m.microdonMerriam,1901—fromCChiapasState(SEMexico)StoCGuatemala.

R.m.albilabrisMerriam,1901—NCOaxacaState(SMexico).

R. m. wagner Hooper, 1950 — from C Michoacan E to México states (C Mexico).

Descriptive notes. Head-body c.68-70 mm, tail 101-117 mm, ear 16-19 mm, hindfoot 19-21 mm; weight 20 g. The Small-toothed Harvest Mouse is mediumto large-sized. Dorsal pelage is thick and cinnamon-orange to dark reddish brown. Venter is whitish to bright orangish or pinkish cinnamon. Eyes have distinct black rings. Hindfeet are blackish, sometimes rimmed with white. Tail is unicolored and blackish.

Habitat. Hillsides and canyons in pine-fir and pine-oak forests at elevations of 2225— 3050 m. Small-toothed Harvest Mice prefer typical cloud forest, montane grassland and shrubland (zacatonal), or volcanic habitat where undergrowth consists of ferns, mosses, and shrubs.

Food and Feeding. The Small-toothed Harvest Mouse feeds on seeds, grains, grasses, and other vegetation.

Breeding. No information.

Activity patterns. The Small-toothed Harvest Mouse is the most arboreal and specialized species of Reithrodontomys . It is presumably nocturnal.

Movements, Home range and Social organization. No information.

Status and Conservation. Classified as Least Concern on The IUCN Red List. Because populations of Small-toothed Harvest Mice are supposedly declining, further investigation is needed to accurately assess its conservation status.

Bibliography. Hall (1981), Hooper (1950, 1952a), Merriam (1901b), M{idespacher & Gaona (2014), Sanchez (1993).

Figures

208. Golden Mouse (Ochrotomys nuttalli), 209. Southern Pygmy Mouse (Baiomys musculus), 210. Northern Pygmy Mouse (Baiomys taylori), 211. Short-tailed Singing Mouse (Scotinomys teguina), 212. Long-tailed Singing Mouse (Scotinomys xerampelinus), 213. Yellow Deermouse (Isthmomys flavidus), 214. Mount Pirr 1 Deermouse (Isthmomys pirrensis), 215. Florida Deermouse (Podomys floridanus), 216. Volcano Deermouse (Neotomodon alstoni), 217. Short-nosed Harvest Mouse (Reithrodontomys brevirostris), 218. Darien Harvest Mouse (Reithrodontomys darienensis), 219. Slender Harvest Mouse (Reithrodontomys gracilis), 220. Mexican Harvest Mouse (Reithrodontomys mexicanus), 221. Nicaraguan Harvest Mouse (Reithrodontomys paradoxus), 222. Cozumel Harvest Mouse (Reithrodontomys spectabilis), 223. Talamancan Harvest Mouse (Reithrodontomys creper), 224. Rodriguez's Harvest Mouse (Reithrodontomys rodriguez), 225. Narrow-nosed Harvest Mouse (Reithrodontomys tenuirostris), 226. Small-toothed Harvest Mouse (Reithrodontomys microdon), 227. Costa Rican Harvest Mouse (Reithrodontomys cherrii), 228. Chiriquian Harvest Mouse (Reithrodontomys garichensis), 229. Musser’s Harvest Mouse (Reithrodontomys musser), 230. Baker’s Harvest Mouse (Reithrodontomys baker), 231. Fulvous Harvest Mouse (Reithrodontomys fulvescens), 232. Hairy Harvest Mouse (Reithrodontomys hirsutus), 233. Sonoran Harvest Mouse (Reithrodontomys burt), 234. Volcano Harvest Mouse (Reithrodontomys chrysopsis), 235. Eastern Harvest Mouse (Reithrodontomys humulis), 236. Western Harvest Mouse (Reithrodontomys megalotis), 237. Plains Harvest Mouse (Reithrodontomys montanus), 238. Salt-marsh Harvest Mouse (Reithrodontomys raviventris), 239. Sumichrast’s Harvest Mouse (Reithrodontomys sumichrasti), 240. Zacatecan Harvest Mouse (Reithrodontomys zacatecae), 242. Northern Grasshopper Mouse (Onychomys leucogaster), 243. Southern Grasshopper Mouse (Onychomys torridus), 244. Osgood’s Deermouse (Osgoodomys banderanus)

Subspecies and Distribution. R.m.microdonMerriam,1901—fromCChiapasState(SEMexico)StoCGuatemala. R.m.albilabrisMerriam,1901—NCOaxacaState(SMexico). R. m. wagner Hooper, 1950 — from C Michoacan E to México states (C Mexico).