Mammal Species of the World Logo


HOME --> CLASS MAMMALIA  --> ORDER RODENTIA  --> SUBORDER MYOMORPHA  --> SUPERFAMILY Muroidea  --> FAMILY Cricetidae  --> SUBFAMILY Sigmodontinae  --> GENUS Oxymycterus

SPECIES Oxymycterus rufus

Author:Fischer, 1814.
Citation:Zoognosia, 3: 71.
Common Name:Rufous Hocicudo
Type Locality:Argentina, Entre Ríos Prov., 32.5°S latitude along lower Río Paraná (as restricted by Hershkovitz, 1994:36, but see comments).
Distribution:EC Argentina.
Status:IUCN – Lower Risk (lc).
Comments:Priority of Mus rufus Fischer, 1814, over Mus rutilans Olfers, 1818, both based on Azara's (1801) descriptions, deserves formal stabilization as does clarification of the morphological identity of the species with Azara’s "Rat cinquieme ou rat roux." Similarly, decisive fixation of the type locality is required. Cabrera (1961) cited Rengger (1830) for the placement of the type locality near Asunción, Paraguay, but Rengger’s basis for this interpretation is unclear since Azara (1802) mentioned collecting the species in an arroyo at 32.5 degrees, presumably S latitude. Hershkovitz (1994), perhaps following Musser and Carleton’s observations (1993:727), restricted the type locality as given above; Galliari et al. (1996) instead noted that the type locality should be restricted to the vicinity of San Ignacio Guazú, Paraguay. Vitullo et al. (1986) supported the union of O. rufus and platensis as one species based on their chromosomal similarity, a synonymy that warrants reassessment given the karyotypic monomorphism that apparently characterizes the genus (Bonvicino et al., 1998b). Vicariant sister species of O. josei in Uruguay according to phylogenetic analysis of cytochrome b data (Hoffmann et al., 2002).



    platensis Thomas, 1914
    rutilans (Olfers, 1818)

  Bucknell Home Page   Biology Department Home Page


©Bucknell Univesity All Rights Reserved
Comments and questions to