Ten New Genera of Oryzomyine Rodents (Cricetidae: Sigmodontinae)

  title={Ten New Genera of Oryzomyine Rodents (Cricetidae: Sigmodontinae)},
  author={Marcelo Weksler and Alexandre Reis Percequillo and Robert S. Voss},
Abstract In order to achieve a monophyletic classification of oryzomyine rodents, 10 new genera are described for species or species groups previously referred to the polyphyletic genus Oryzomys. The following names are proposed: Aegialomys, n.gen. (for the “xanthaeolus group” of authors); Cerradomys, n.gen. (for the “subflavus group”); Eremoryzomys, n.gen. (for polius); Euryoryzomys, n.gen. (for the “nitidus group”); Hylaeamys, n.gen. (for the “megacephalus group”); Mindomys, n.gen. (for… 

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Two novel species of Cerradomys are described, one distributed in the Brazilian states of Minas Gerais, Bahia, and Sergipe, and the other in the states of Paraíba, Pernambuco, Piauí, Ceará, and Maranhão.

A newly recognized clade of trans-Andean Oryzomyini (Rodentia: Cricetidae), with description of a new genus

H aphrastus is best regarded as representing a new genus, which is described and named herein and forms a monophyletic group of mainly southern Central American and northern South American taxa primarily restricted to lowland to midelevation montane trans-Andean habitats and possessing a marked ability to cross expanses of salt water.

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A medium-sized oryzomyine is described as a new genus having at least three new species, two of them named and diagnosed, and seems to be another example of a sigmodontine rodent unique to the Chocó biogeographic region.

Chapter 3. Review of the Oryzomys couesi Complex (Rodentia: Cricetidae: Sigmodontinae) in Western Mexico

The recommended taxonomic changes within western Mexico serve to discuss directions for future revisionary research that will refine the definition and distribution of O. couesi sensu stricto in Middle America.

A new species of Tanyuromys Pine, Timm, and Weksler, 2012 (Cricetidae: Oryzomyini), with Comments on relationships within the Oryzomyini

A new species of long-tailed sigmodontine rodent of the genus Tanyuromys is named and described, based on 3 specimens collected from 3 different localities in northern Ecuador, during the period 1953–2008, and the genus' phylogenetic associations within the Oryzomyini are inferred based on the complete Cytb sequence.

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Molecular phylogeny of the genus Oryzomys (Rodentia: Sigmodontinae) based on cytochrome b DNA sequences.

The monophyly of three Oryzomys species groups was tested, by distance, parsimony, and maximum-likelihood (ML), and 801 bp of the mitochondrial gene cytochrome b was analyzed; the results did not sustain the monophyle of OryZomys nor of the nitidus and subflavus species groups.

A New Genus for Aepeomys fuscatus Allen, 1912, and Oryzomys intectus Thomas, 1921: Enigmatic Murid Rodents from Andean Cloud Forests

Morphological comparisons of Handleyomys with the type species of Aepeomys Thomas and Oryzomys Baird provide a basis for preliminary inferences about phylogenetic relationships, but no close relationship between the new genus and any particular oryzomyine clade is indicated by the data at hand.

Systematic studies of Oryzomyine rodents (Muridae, Sigmodontinae): diagnoses and distributions of species formerly assigned to Oryzomys 'capito'

This study considers Fischer’s (1814) Mus megacephalus to be valid and available, designate a neotype to bear the name, and reinstate it as a senior synonym of capito Olfers (1818).

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The Bolivian sample has the closest genetic relationship to O. perenensis (Kimura 2-parameter genetic distance × 100: 14.8) and O. laticeps, but the genetic distance is large, and it is described as a new species.

Phylogeny of Neotropical oryzomyine rodents (Muridae: Sigmodontinae) based on the nuclear IRBP exon.

  • M. Weksler
  • Biology
    Molecular phylogenetics and evolution
  • 2003

Phylogenetic Relationships of Oryzomine Rodents (Muroidea: Sigmodontinae): Separate and Combined Analyses of Morphological and Molecular Data

A phylogenetic hypothesis for the tribe Oryzomyini is provided that can be used to understand the diversification and evolution of this group of rodents and to revise the current generic-level classification.

Relationships of Megaoryzomys curioi, an Extinct Cricetine Rodent (Muroidea: Muridae) from the Galápagos Islands, Ecuador

The study of additional material indicates that Megaoryzomys curioi is not closely related to OryZomys but is most similar to large species of Thomasomys, a genus confined to mainland South America.

Molecular phylogenetics of oryzomyine rodents: the genus Oligoryzomys.

In this study, sequences of nucleotides making up cytochrome b violate an important assumption of phylogenetic analysis, independence of characters in a group of South American rodents.

A New Species of Oryzomys (Rodentia: Muridae) from an Isolated Pocket of Cerrado in Eastern Bolivia

This work states that characterization of species within the genus Oryzomys has met with some confusion in the past, but significant work has taken place to help define specific limits within this group.