Hispid cotton rat Sigmodon hispidus, photographed by Stephen Pollard.

Belongs within: Sigmodontinae.

Sigmodon, the cotton rats, is a genus of rats with long, coarse fur found in southern North America and northern South America. The hispid cotton rat Sigmodon hispidus is a known vector of hantavirus, which causes a dangerous flu-like illness.

Characters (from Goodwin 1969): Total length more than 250 mm; tail shorter than length of head and body, not conspicuously annulated. Pelage long and coarse. Skull rounded; rostrum long; upper incisors not grooved on anterior surface.

| i. s.: S. alticolaG69
| S. curtisi Gidley 1922MH03
| S. hudspethensisMH03
| S. lindsayiMH03
| S. macdougalliG69
| S. minor Gidley 1922MH03
| |--S. m. minorMH03
| `--S. m. mediusMH03
|--S. alstoniFS15
`--+--S. peruanusFS15
`--+--+--S. fulviventer Allen 1889FS15, MB86
| `--S. leucotis Bailey 1902FS15, MB86
`--+--+--S. inopinatusFS15
| `--S. ochrognathusFS15
`--+--+--S. arizonaeFS15 [=S. hispidus arizonaeG69]
| `--S. mascotensis Allen 1897FS15, MB86 [=S. hispidus mascotensisG69]
`--+--+--S. hispidusFS15
| | |--S. h. hispidusMB86
| | |--S. h. berlandieri Baird 1855MB86
| | |--S. h. ischyrusG69
| | |--S. h. majorG69
| | |--S. h. obvelatusG69
| | |--S. h. saturatusG69
| | |--S. h. texianus (Audubon & Bachman 1853) [=Arvicola texiana]B75
| | `--S. h. tonalensisG69
| `--S. toltecusFS15 [=S. hispidus toltecusG69]
`--+--S. hirsutusFS15
`--+--S. alleniFS15
`--S. planifronsFS15 (see below for synonymy)

Sigmodon planifronsFS15 [incl. S. macrodonG69, S. minor Goodwin 1955 non Gidley 1922G69, S. planifrons setzeri Goodwin 1959G69]

*Type species of generic name indicated


[B75] Bowles, J. B. 1975. Distribution and biogeography of mammals of Iowa. Special Publications, The Museum, Texas Tech University 9: 1–184.

Faurby, S., & J.-C. Svenning. 2015. A species-level phylogeny of all extant and late Quaternary extinct mammals using a novel heuristic-hierarchical Bayesian approach. Molecular Phylogenetics and Evolution 84: 14–26.

[G69] Goodwin, G. G. 1969. Mammals from the State of Oaxaca, Mexico, in the American Museum of Natural History. Bulletin of the American Museum of Natural History 141 (1): 1–269, 40 pls.

[MH03] Martin, R. A., R. T. Hurt, J. G. Honey & P. Peláez-Campomanes. 2003. Late Pliocene and Early Pleistocene rodents fom the northern Borchers Badlands (Meade County, Kansas), with comments on the Blancan-Irvingtonian boundary in the Meade Basin. Journal of Paleontology 77 (5): 985–1001.

[MB86] Matson, J. O. & R. H. Baker. 1986. Mammals of Zacatecas. Special Publications, Museum of Texas Tech University 24: 1–88.

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