Here we report the first record of Drymoreomys albimaculatus Percequillo, Weksler & Costa, (Cricetidae, Sigmodontinae) in Rio de Janeiro state, Brazil. The recently described taxon Drymoreomys albimaculatus is endemic to the Brazilian Atlantic Forest and its biology and genetics are still poorly known. Herein. PDF | Drymoreomys albimaculatus is a recently-described rodent and an Atlantic Forest endemic. It is rare and has a poorly defined geographic.

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Introduction The Atlantic Forest harbors a high diversity of mammals, 20 percent of which are rodents of the subfamily Sigmodontinae Ribeiro et al. The algorithm is described in the ISO standard. Karyologic diversification and phylogenetic relationships of the genus Thalpomys Rodentia, Sigmodontinae.

Pelage color and external measurements were taken during the fieldwork. Sigmodontinae and description of two new species from southeastern Brazil. Abstract The recently described taxon Drymoreomys albimaculatus is endemic to the Brazilian Atlantic Forest and its biology and genetics are still poorly known. By using this site, you agree to the Terms of Use and Privacy Policy. It is useful for tracking sequence updates. Conventional Giemsa staining was used to determine the diploid 2n and the number of autosome arms FN.

Drymoreomys – Wikipedia

A Taxonomic and Geographic Reference. The interorbital region between the eyes is narrow and long, with the narrowest part towards the front. Please review our privacy policy. On the urethral processlocated in the crater at the end of the penis, a fleshy process at the side, the lateral lobuleis present.


Experimental Cell Albimaculaths Retrieved from ” https: Articles from ZooKeys are provided here courtesy of Pensoft Publishers. These external morphological measures overlapped with those of the Drymoreomys albimaculatus holotype Percequillo et al.

Here, we describe the karyotype of Drymoreomys albimaculatus for the first time. Select the link destinations: Almeida and Yonenaga-Yassuda Markov chains were started from a random tree and run for 1.

Key to the genera of the tribe Oryzomyini Rodentia: Recently, Percequillo et al. Overall, the fur of the upperparts is orange to reddish- buff. Di-Nizo1 Carolina L.

June 16, Last sequence update: Branch support was estimated by Bayesian posterior probabilities BPP. Sigmodontinae from Misiones Province, Argentina.

In other projects Wikimedia Commons Wikispecies. Sigmodontinae based on the nuclear IRBP exon. Integrated resource of protein families, domains and functional sites More Molecular Phylogenetics and Evolution 1: Drymoreomys albimaculatus Percequillo, Weksler, and Costa, The diploid number of Drymoreomys albimaculatus corroborates the pattern found for the majority of the Oryzomyini species, in which karyotypes present relatively high chromosome number and predominantly acrocentric pairs.

This hypothesis could imply chromosomal plasticity in low 2n ratios as suggested by Gardner and Patton The upper incisors are opisthodont with the cutting surface oriented backwards and have orange to yellow enamel. Although its range is relatively large and includes some protected areasit is patchy and threatened, and the discoverers recommend that the animal be considered ” Near Threatened ” on dtymoreomys IUCN Albimacultus List.

The upper surface on the forefeet is covered with brown fur, and there is white or silvery fur on the digits. Views Read Edit View history. Article Tools How to cite item.


The mystacial vibrissae whiskers on the upper lip are long, usually extending a little beyond the ears when laid back against the head, but the superciliary vibrissae whiskers above the eyes are short and do not extend beyond the ears.

Albimacculatus nodal support indices and Bayesian posterior probabilities are shown above the branches, respectively. Voss and Myers ; Moreira et al.

Notably, cytogenetic data in Oryzomyini has increased considerably in the last decades, mainly because the karyotype has become a valid tool for identifying species of this group. In the skull, the rostrum front part is relatively long. Within Oryzomyini, Drymoreomys appears to be most closely related to Eremoryzomys from the Andes albimaculatuz Peru, a biogeographically unusual relationship, in that the albimacylatus populations are widely separated and each is adapted to an arid or a moist environment.

The mandible lower jaw is long and low. First cytogenetic information for Drymoreomys albimaculatus Rodentia, Cricetidaea recently described genus from Brazilian Atlantic Forest. Cytogenetic and Genome Research Cricetidaean Atlantic Forest endemic with the description of a new species.

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National Institutes of Health. Arquivos do Museu Nacional Rio de Janeiro Oryzomyiniwith comments on Oryzomyine biogeography. Zoological Journal of Linnean Society