| 词条 | Rhagomys |
| 释义 |
| taxon = Rhagomys | authority = Thomas, 1917 | type_species = Hesperomys rufescens | type_species_authority = Thomas, 1886 | subdivision_ranks = Species | subdivision =Rhagomys longilingua Rhagomys rufescens }} Rhagomys is a genus of South American rodents in the tribe Thomasomyini of the family Cricetidae.[1] Two species separated by about 3100 km[2] are known, from southeast Peru and Bolivia east of the Andes, and in the Atlantic Forest of southeast Brazil.[1] An undetermined species of Rhagomys has also been reported from Mato Grosso in central Brazil.[3] The species are as follows:
This genus is distinguished from other sigmodontine rodents by the presence of a nail on the hallux.[2] Nuclear DNA sequence analysis has indicated that it is a sister taxon to Thomasomys.[2] The geographic distribution may reflect a formerly continuous distribution made disjunct by extinctions, or may reflect limited sampling of the intervening areas.[4] While no other mammal taxa have a similar geographic distribution, a group of hylid frogs does.[4] Juscelinomys is an example of another sigmodontine rodent genus that also has a disjunct distribution.[4] Some disjunct distributions have been attributed to fluctuations in forest coverage during the Pleistocene, resulting from the climatic swings of the ice age.[4] However, the report of molars of an unknown member of the genus in an ocelot scat sample from a geographically intermediate location suggests that the disjunct distribution may well be artifact of limited sampling.[3] References1. ^1 {{MSW3 Muroidea | id = 13000875 | page = 1166}} {{Taxonbar|from=Q899168}}{{Sigmodontinae-stub}}2. ^1 2 {{Cite journal | last = D'Elía | first = G. | authorlink = |author2=Luna, L. |author3=González, E. M. |author4=Patterson, B. D. | title = On the Sigmodontinae radiation (Rodentia, Cricetidae): An appraisal of the phylogenetic position of Rhagomys | journal = Molecular Phylogenetics and Evolution | volume = 38 | issue = 2 | pages = 558–564 | publisher = Elsevier | date = February 2006 | url = | doi = 10.1016/j.ympev.2005.08.011 | id = | pmid=16213166}} 3. ^1 {{cite journal | last = Percequillo | first = A. R. | authorlink = |author2=Tirelli, F. P. |author3=Michalski, F. |author4=Eizirik, E. | title = The genus Rhagomys (Thomas 1917) (Rodentia, Cricetidae, Sigmodontinae) in South America: morphological considerations, geographic distribution and zoogeographic comments | journal = Mammalia | volume = 75 | issue = | pages = 195–199 | publisher = de Gruyter | location = | date = 2011 | language = | url = http://www.lcb.esalq.usp.br/publications/articles/2011/2011mv75n2p195-199.pdf | doi = 10.1515/MAMM.2011.007 | accessdate = 2011-12-26}} 4. ^1 2 3 {{cite journal | last = Luna | first = L. | authorlink = |author2=Patterson, B. D. | title = A Remarkable New Mouse (Muridae: Sigmodontinae) from Southeastern Peru: With Comments on the Affinities of Rhagomys rufescens (Thomas, 1886) | journal = Fieldiana Zoology | volume = 101 | issue = | pages = 1–24 | publisher = | location = | date = 2003-04-30 | language = | url = http://fm1.fieldmuseum.org/aa/Files/patterso/fzoo-169-1.pdf | doi = | accessdate = 2011-12-26}} 2 : Rhagomys|Rodent genera |
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