Muridae Author Don E. Wilson Author Russell A. Mittermeier Author Thomas E. Lacher, Jr text 2017 2017-11-30 Lynx Edicions Barcelona Handbook of the Mammals of the World – Volume 7 Rodents II 536 884 book chapter 100954 10.5281/zenodo.6887260 a016af63-6437-427b-80b7-22bc9a002e20 978-84-16728-04-6 6887260 430. Ethiopian Three-toed Grass Rat Mylomys rex French: Mylomys roi / German: Athiopien-Furchenzahnratte / Spanish: Rata de hierba de tres dedos de Etiopia Other common names: Ethiopian Groove-toothed Rat , Ethiopian Mylomys , King Mylomys Taxonomy. Arvicanthis rex Thomas, 1906 , Charada Forest, Kaffa, central Ethiopia. Known only from holotype. M. rex was previously included variously in Arvicanthis and in Pelomys , but shown to belong to Mylomys . It is geographically disjunct from and larger in size than M. dybowskii . Monotypic. Distribution. Known only from type locality in Ethiopia. Descriptive notes. Head-body 212 mm, tail 175 mm, ear 24 mm, hindfoot 35 mm. No specific data are available for body weight. The Ethiopian Three-toed Grass Rat is a very large stoutly built rodent with coarse dark pelage and thicktail is similarlooking to a large Arvicanthis . Fur is speckled sandy brown above, redder around rump, contrasting sharply with bluish white on belly. Forefeet have three functional toes. Tail is long (83% of head-body length) and coarsely ringed. Habitat. Montane forest. Food and Feeding. No information. Breeding. No information. Activity patterns. No information. Movements, Home range and Social organization. No information. Status and Conservation. Classified as Data Deficient on The IUCN Red List. Bibliography. Happold (2013a), Monadjem et al. (2015), Musser & Carleton (1993, 2005), Yalden & Largen {1992),