Order Rodentia - Family Echimyidae Author Wilson, Don E. Author Reeder, DeeAnn text 2005 The Johns Hopkins University Press Baltimore Mammal Species of the World: a Taxonomic and Geographic Reference (3 rd Edition), Volume 2 1575 1592 book chapter 0-8018-8221-4 10.5281/zenodo.7316535 Echimys semivillosus I. Geoffroy 1838 Echimys semivillosus I. Geoffroy 1838 , Ann. Sci. Nat. Zool. (Paris), ser. 2, 10: 125 . Type Locality: Colombia , Bolivar Dept., Cartagena. Vernacular Names: Speckled Spiny Tree-rat . Synonyms: Echimys carrikeri (J. A. Allen 1911) ; Echimys flavidus ( Hollister 1914 ) ; Echimys punctatus (Thomas 1899) . Distribution: N Colombia , Venezuela , Margarita Isl. Conservation: IUCN – Lower Risk (lc). Locally common. Discussion: See Cabrera (1961:542-543). Taxonomy being revised (Emmons, In Press).