Oryzomys Baird 1857

Wilson, Don E. & Reeder, DeeAnn, 2005, Order Rodentia - Family Cricetidae, Mammal Species of the World: a Taxonomic and Geographic Reference (3 rd Edition), Volume 2, Baltimore: The Johns Hopkins University Press, pp. 955-1189 : 1144

Oryzomys Baird 1857

Oryzomys Baird 1857 , Mammalia, in: Repts. U. S. Expl. Surv., Vol. 8, 1: 458.

Type Species: Mus palustris Harlan 1837

Synonyms: Macruroryzomys Hershkovitz 1948 ; Micronectomys Hershkovitz 1948 .

Species and subspecies: 43 species:

Species Oryzomys albigularis Tomes 1860

Species Oryzomys alfaroi J. A. Allen 1891

Species Oryzomys angouya (G. Fischer 1814)

Species Oryzomys auriventer Thomas 1890

Species Oryzomys balneator Thomas 1900

Species Oryzomys bolivaris J. A. Allen 1901

Species Oryzomys caracolus Thomas 1914

Species Oryzomys chapmani Thomas 1898

Species Oryzomys couesi Alston 1876

Species Oryzomys curasoae McFarlane and Debrot 2001

Species Oryzomys devius Bangs 1902

Species Oryzomys dimidiatus Thomas 1905

Species Oryzomys emmonsae Musser, Carleton, Brothers, and Gardner 1998

Species Oryzomys galapagoensis ( Waterhouse 1839)

Species Oryzomys gorgasi Hershkovitz 1971

Species Oryzomys hammondi Thomas 1913

Species Oryzomys keaysi J. A. Allen 1900

Species Oryzomys lamia Thomas 1901

Species Oryzomys laticeps (Lund 1840)

Species Oryzomys legatus Thomas 1925

Species Oryzomys levipes Thomas 1902

Species Oryzomys macconnelli Thomas 1910

Species Oryzomys maracajuensis Langguth and Bonvicino 2002

Species Oryzomys marinhus Bonvicino 2003

Species Oryzomys megacephalus (G. Fischer 1814)

Species Oryzomys melanotis Thomas 1893

Species Oryzomys meridensis Thomas 1894

Species Oryzomys nelsoni Merriam 1898

Species Oryzomys nitidus Thomas 1884

Species Oryzomys palustris (Harlan 1837)

Species Oryzomys perenensis J. A. Allen 1901

Species Oryzomys polius Osgood 1913

Species Oryzomys rhabdops Merriam 1901

Species Oryzomys rostratus Merriam 1901

Species Oryzomys russatus (Wagner 1848)

Species Oryzomys saturatior Merriam 1901

Species Oryzomys scotti Langguth and Bonvicino 2002

Species Oryzomys seuanezi Weksler, Geise, and Cerqueira 1999

Species Oryzomys subflavus (Wagner 1842)

Species Oryzomys talamancae J. A. Allen 1891

Species Oryzomys tatei Musser, Carleton, Brothers, and Gardner 1998

Species Oryzomys xanthaeolus Thomas 1894

Species Oryzomys yunganus Thomas 1902

Discussion:

Oryzomyini . A taxonomically complex and nomenclaturally confused taxon whose definition was successively broadened by Goldman (1918), Tate (1932 d, e), and Ellerman (1941). By the time of Cabrera (1961), the genus embraced as subgenera Melanomys , Microryzomys , Nesoryzomys , Oecomys , and Oligoryzomys —a polyphyletic agglomeration of taxa as evolutionarily divergent from one another, and from Oryzomys sensu stricto , as Neacomys is from Nectomys , forms traditionally accorded generic status (see Carleton and Musser, 1989:52). Others have recognized some or all of these as genera (e.g., Carleton and Musser, 1984, 1989; Gardner and Patton, 1976; Gyldenstolpe, 1932; Reig, 1981, 1984; Thomas, 1917 c), as we continue to do here; see appropriate generic accounts for taxonomic histories.

Notwithstanding the elevation of the aforementioned genus-group taxa, the generic boundary as denotatively conveyed by the species listed here remains a polyphyletic shell. The species may be morphologically and-or geographically sorted into the following groups whose relationship to one another and to other oryzomyine genera is incompatible with their continued association under a single genus: Albigularis complex ( albigularis , auriventer , caracolus , devius , keaysi , levipes , meridensis ); Balneator ( balneator ); Chapmani complex ( chapmani , saturatior ); Hammondi ( hammondi ); Megacephalus complex ( megacephalus [ laticeps , megacephalus , perenensis , suazensis] and yunganus [ tatei , yunganus ] species groups); Nitidus complex (Transandean [ alfaroi , bolivaris , melanotis , rhabdops , rostratus , and talamancae ] and Amazonian-Atlantic Forest [ emmonsae , kelloggi ?, lamia , legatus , macconnelli , nitidus , and russatus ] species groups); North and Central American Oryzomys sensu stricto ( couesi , dimidiatus , gorgasi , nelsoni , and palustris ); and the very heterogeneous residuum of South American " Oryzomys " ( angouya , galapagoensis , maracajuensis , marinhus , polius , scotti , subflavus , and xanthaeolus ). See discussions in Carleton and Musser (1989), Carleton and Olson (1999), and Voss et al. (2002) on the need to objectively represent the monophyly and diagnosis of Oryzomys sensu stricto as elementary to improving comprehension of orzyomyine phylogeny. See Weksler (2003) for molecular evidence that pointedly underscores the polyphyletic contents of the genus as currently arranged.

Karyotypic information for many species supplied by Baker et al. (1983), Gardner and Patton (1976), and Haiduk et al. (1979); multispecific molecular surveys and extended taxonomic commentary provided by Patton et al. (2000), Bonvicino et al. (2001), and Weksler (2003); for morphological surveys, see Carleton (1973, 1980), Hooper and Musser (1964a), Musser et al. (1998), Voss and Linzey (1981), and Voss et al. (2001); for overview of habitat and distribution, see Sánchez-Cordero and Valadez-Azua (1989). Much basic alpha-level revision yet required

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