The southern cotton rat (Sigmodon hirsutus) is a rodent species in the family Cricetidae.[2] It is found from southern Chiapas in Mexico through Central America, except for Belize, and as far east as northern Colombia and Venezuela. It lives in tropical rainforest, dry forest and savanna, as well as in cultivated areas.[1] The species is terrestrial and primarily diurnal.[1] It was long thought to be a subspecies of S. hispidus. However, recent taxonomic revisions, based on mitochondrial DNA sequence data, have split the extensive former species range into three separate species. Carroll et al. (2004) indicate that the southern edge of the S. hispidus distribution is likely near the Rio Grande where it meets the northern distribution of S. toltecus (formerly S. h. toltecus). The range of S. toltecus extends from northern Mexico south into Chiapas where it occurs in sympatry with S. hirsutus (formerly S. h. hirsutus).
Rats from this species group have been used as laboratory animals.[3]
^ abcDelgado, C.; Aguilera, M.; Timm, R.; Samudio, R. (2017) [errata version of 2016 assessment]. "Sigmodon hirsutus". IUCN Red List of Threatened Species. 2016: e.T136426A115207583. Retrieved 24 December 2019.
^Musser, G.G.; Carleton, M.D. (2005). "Superfamily Muroidea". In Wilson, D.E.; Reeder, D.M (eds.). Mammal Species of the World: A Taxonomic and Geographic Reference (3rd ed.). Johns Hopkins University Press. p. 1175. ISBN 978-0-8018-8221-0. OCLC 62265494.
^Mittal, S. K.; Middleton, D. M.; Tikoo, S. K.; Prevec, L.; Graham, F. L.; Babiuk, L. A. (Jan 1996). "Pathology and immunogenicity in the cotton rat (Sigmodon hispidus) model after infection with a bovine adenovirus type 3 recombinant virus expressing the firefly luciferase gene". J. Gen. Virol.77 (1): 1–9. doi:10.1099/0022-1317-77-1-1. PMID 8558115. Retrieved 2011-03-01.
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