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Systematics of neotropical spiny mice, genus Neacomys Thomas, 1900 (Rodentia: Cricetidae), from southeastern Amazonia, with descriptions of three new species. (American Museum novitates, no. 3958)

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dc.contributor.author Semedo, Thiago Borges Fernandes
dc.contributor.author Da Silva, Maria Nazareth F.
dc.contributor.author Gutiérrez, Eliécer E.
dc.contributor.author Ferreira, Daniela Cristina
dc.contributor.author Nunes, Mario Da Silva
dc.contributor.author Mendes-Oliveira, Ana C.
dc.contributor.author Farias, Izeni Pires
dc.contributor.author Rossi, Rogério V.
dc.date.accessioned 2020-09-05T17:06:42Z
dc.date.available 2020-09-05T17:06:42Z
dc.date.issued 2020-09-05
dc.identifier.issn 0003-0082
dc.identifier.uri http://digitallibrary.amnh.org/handle/2246/7239
dc.description 43 pages : illustrations (some color), map ; 26 cm. en_US
dc.description.abstract Species of Neacomys are small cricetid rodents that occur in forested habitats of Central and South America, from eastern Panama to central Bolivia and central/western Brazil. In order to assess species diversity of this poorly known genus, we obtained cytochrome b gene sequences from the most comprehensive taxonomic and geographic sampling analyzed to date. We also conducted morphological analyses on a large series of specimens housed in 15 museums, including types of 10 out of 14 nominal taxa. Our analyses of the genetic data recovered 17 lineages clustered in four distinct clades. Among these lineages, 11 correspond to species currently recognized as valid, and the remaining six are putative new species. In southeastern Amazonia--the geographical scope of this report--four undescribed species were discovered, three of which are named herein: Neacomys marajoara, sp. nov., from the Island of Marajó, Pará state; Neacomys vossi, sp. nov., restricted to the Tapajós center of endemism (between the Tapajós and Xingu rivers); and Neacomys xingu, sp. nov., restricted to the Xingu center of endemism (between the Xingu and Araguaia/Tocantins rivers). The new species can be discriminated from other Neacomys species by the morphology of the nasal bones, zygomatic plate, interorbital region, subsquamosal fenestra, paraoccipital process, incisive foramina, auditory bullae, anterocone and anteroloph of the first upper molar, carotid circulation pattern, and karyotype. Our results substantially improve our understanding of the genus Neacomys by providing morphological, morphometric, and novel molecular insights about these poorly known rodents and demonstrate that the diversity of small Amazonian mammals is still poorly known, even in the relatively accessible southeastern part of the biome. en_US
dc.language.iso en_US en_US
dc.publisher American Museum of Natural History. en_US
dc.relation.ispartofseries American Museum novitates;no.3958.
dc.subject Muridae--Classification. en_US
dc.subject Mice--Amazon River Region--Classification. en_US
dc.subject Rodents--Amazon River Region--Classification. en_US
dc.subject Neacomys marajoara. en_US
dc.subject Neacomys vossi. en_US
dc.subject Neacomys xingu. en_US
dc.title Systematics of neotropical spiny mice, genus Neacomys Thomas, 1900 (Rodentia: Cricetidae), from southeastern Amazonia, with descriptions of three new species. (American Museum novitates, no. 3958) en_US


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  • American Museum Novitates
    Novitates (Latin for "new acquaintances"), published continuously and numbered consecutively since 1921, are short papers that contain descriptions of new forms and reports in zoology, paleontology, and geology. New numbers are published at irregular intervals.

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