ArticlePloS one2017
Oecomys catherinae (Sigmodontinae, Cricetidae): Evidence for chromosomal speciation?
Article in PloS one, 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 13 papers.
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Who cites it
13 citing papers in PubMed, 22 citations in OpenAlex.
- Article
- Chromosomal rearrangements drive diversity in arboreal rodents of the genus Oecomys.Scientific reports · 2025Article
- A Cryptic Subterranean Mammal Species, the Lesser Blind Mole Rat (Animals : an open access journal from MDPI · 2024Article
- Chromosomal rearrangements played an important role in the speciation of rice rats of genus Cerradomys (Rodentia, Sigmodontinae, Oryzomyini).Scientific reports · 2024Article
- The emergence of a new sex-system (XX/XYScientific reports · 2022Article
- Cryptic Diversity of the European Blind Mole RatAnimals : an open access journal from MDPI · 2022Article
- New karyotype forEcology and evolution · 2021Article
- Article
- Potential mammalian species for investigating the past connections between Amazonia and the Atlantic Forest.PloS one · 2021Article
- Chromosomal Signatures Corroborate the Phylogenetic Relationships within Akodontini (Rodentia, Sigmodontinae).International journal of molecular sciences · 2020Article
- Article
- Chromosomal phylogeny and comparative chromosome painting among Neacomys species (Rodentia, Sigmodontinae) from eastern Amazonia.BMC evolutionary biology · 2019Article
- Advances in cytogenetics of Brazilian rodents: cytotaxonomy, chromosome evolution and new karyotypic data.Comparative cytogenetics · 2017Review
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Authors and funding
11 authors at 5 institutions in 2 countries.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Among the Oryzomyini (Sigmodontinae), Oecomys is the most speciose, with 17 species. This genus presents high karyotypic diversity (2n = 54 to 2n = 86) and many taxonomic issues at the species level because of the presence of cryptic species and the overlap of morphological characters. For these reasons the real number of species of Oecomys may be underestimated. With the aim of verifying if the taxon Oecomys catherinae is composed of more than one species, we made comparative studies on two populations from two regions of Brazil, one from the Amazon and another from the Atlantic Forest using both classical cytogenetics (G- and C-banding) and comparative genomic mapping with whole chromosome probes of Hylaeamys megacephalus (HME), molecular data (cytochrome b mitochondrial DNA) and morphology. Our results confirm that Oecomys catherinae occurs in the southeast Amazon, and reveal a new karyotype for the species (2n = 62, FNa = 62). The comparative genomic analysis with HME probes identified chromosomal homeologies between both populations and rearrangements that are responsible for the different karyotypes. We compared our results in Sigmodontinae genera with other studies that also used HME probes. These chromosomal differences together with the absence of consistent differentiation between the two populations on morphological and molecular analyses suggest that these populations may represent cryptic species.
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