The rodent subfamily Sigmodontinae includes New World rats and mice, with at least 376 species. Many authorities include the Neotominae and Tylomyinae as part of a larger definition of Sigmodontinae. When those genera are included, the species count numbers at least 508. Their distribution includes much of the New World, but the genera are predominantly South American, such as brucies. They invaded South America from Central America as part of the Great American Interchange near the end of the Miocene, about 5 million years ago.[1] Sigmodontines proceeded to diversify explosively in the formerly isolated continent. They inhabit many of the same ecological niches that the Murinae occupy in the Old World.
The "Thomasomyini" from the Atlantic Forest of Brazil are generally thought to be not especially related to the "real" Thomasomyini from the northern Andes and the Amazon rainforest. The genera Wiedomys and Sigmodon are generally placed in their own tribe, and the "phyllotines" Irenomys, Punomys, Euneomys, and Reithrodon are considered incertae sedis.
The name "Sigmodontinae" is based on the name of the type genus, Sigmodon. This name in turn derives from the Greek roots for "S-tooth" (sigm- for "S" and odont- for "tooth", as in orthodontist) for the characteristic of the molars having an S-shape when viewed from above.
^Marshall, L. G.; Butler, R. F.; Drake, R. E.; Curtis, G. H.; Tedford, R. H. (1979-04-20). "Calibration of the Great American Interchange". Science. 204 (4390). AAAS: 272–279. Bibcode:1979Sci...204..272M. doi:10.1126/science.204.4390.272. PMID 17800342. S2CID 8625188. Retrieved 2008-04-15.
The rodent subfamily Sigmodontinae includes New World rats and mice, with at least 376 species. Many authorities include the Neotominae and Tylomyinae...
World rats and mice are often considered part of a single subfamily, Sigmodontinae, but the recent trend among muroid taxonomists is to recognize three...
rats and mice, including deer mice, pack rats, and grasshopper mice Sigmodontinae — New World rats and mice, predominantly South American, such as brucies...
(hamsters) New World rats and mice Neotominae (deer mice and relatives) Sigmodontinae (rice rats, oldfield mice and relatives) Tylomyinae (vesper mice and...
of rodent from the Brazilian Atlantic Forest (Rodentia: Cricetidae: Sigmodontinae: Oryzomyini), with comments on oryzomyine biogeography". Zoological...
cricetid subfamily Sigmodontinae have posterolateral palatal pits. In Oryzomyini (rice rats), the largest tribe of the Sigmodontinae, all but some species—Mindomys...
the subfamilies Sigmodontinae and Neotominae. Many authorities place all three of these subfamilies in a single subfamily, Sigmodontinae. SUBFAMILY TYLOMYINAE...
hamsters) Subfamily Neotominae (North American rats and mice) Subfamily Sigmodontinae (New World rats and mice) Subfamily Tylomyinae (vesper rats and climbing...
Rodents are animals that gnaw with two continuously growing incisors. Forty percent of mammal species are rodents, and they inhabit every continent except...
impressive Neotropical radiation: Molecular time estimates for the Sigmodontinae (Rodentia) provide insights into its historical biogeography". Molecular...
(February 2011). "A new karyotype of Wiedomys pyrrhorhinus (Rodentia: Sigmodontinae) from Chapada Diamantina, northeastern Brazil" (PDF). Zoologia. 28 (1):...
Ichthyomyini is a tribe of New World rats and mice in the subfamily Sigmodontinae. The species within this tribe share the characteristics of all being...
member of its genus, which belongs the tribe Ichthyomyini, subfamily Sigmodontinae and family Cricetidae. The ichthyomyines are semiaquatic carnivorous...
reported, but not assigned to species. The brucies belong to the subfamily Sigmodontinae and the tribe Akodontini. They are ground-dwellers, and may have a preference...
E.; Ortiz, Pablo E.; Pardiñas, Ulyses F. J. (2016). "A new genus of Sigmodontinae (Mammalia, Rodentia, Cricetidae) from the Pliocene of Central Argentina"...
Ulyses F. J.; D'Elía, Guillermo (2013). "A phylogenetic appraisal of Sigmodontinae (Rodentia, C ricetidae) with emphasis on phyllotine genera: systematics...
2006. Phylogenetic relationships of oryzomyine rodents (Muroidea: Sigmodontinae): separate and combined analyses of morphological and molecular data...
rat (Rattus rattus). A member of the family Cricetidae and subfamily Sigmodontinae, it shares several distinctive characters with Holochilus and related...
phylogeny, and diversity of the extinct Lesser Antillean rice rats (Sigmodontinae: Oryzomyini), with description of a new genus and species". Zoological...
mice in the New World, the Sigmodontinae and Tylomyinae. Many authorities place them all in a single subfamily, Sigmodontinae. SUBFAMILY NEOTOMINAE Tribe...
This is a list of North American mammals. It includes all mammals currently found in the United States, St. Pierre and Miquelon, Canada, Greenland, Bermuda...
"Definition and diagnosis of a new tribe of sigmodontine rodents (Cricetidae: Sigmodontinae), and a revised classification of the subfamily" (PDF). Gayana. 71 (2):...
American grass mice of the Akodon varius group (Rodentia, Cricetidae, Sigmodontinae) in South America. Journal of Mammalogy 89(3):768-777. Braun, J. K....
other genera, so that it is now classified as a member of the subfamily Sigmodontinae incertae sedis (of uncertain position). In 1900, Rodolfo Armando Philippi...
(2023). "New species of the Spiny Mouse genus Neacomys (Cricetidae, Sigmodontinae) from northwestern Ecuador". ZooKeys (1175): 187–221. Bibcode:2023ZooK...
America and then spread toward North America. The species infecting Sigmodontinae evolved in Brazil 400 years ago. Their ancestors may have been a Neotominae-associated...
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