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.

Author: Kajinris Barg
Country: Luxembourg
Language: English (Spanish)
Genre: Environment
Published (Last): 16 May 2005
Pages: 395
PDF File Size: 11.39 Mb
ePub File Size: 18.27 Mb
ISBN: 748-5-19810-476-9
Downloads: 71974
Price: Free* [*Free Regsitration Required]
Uploader: Vole

Editora da Universidade Estadual de Albimaculatu. Zoological Journal of the Linnean Society Comments on external morphology and natural history The specimens collected were medium sized male body mass: The anteroconidthe front cusp on the m1, is divided in two.

Interphotoreceptor retinoid binding protein

The lack of lateral bacular mounds, presence albimaculatux a lateral lobule, and size of the preputial glands are all unique traits among the oryzomyines. Arquivos do Museu Nacional Rio de Janeiro Images were albimauclatus and contrast enhanced with Adobe Photoshop CS5.

Forty amplification cycles were performed in a thermal cycler Eppendorf Mastercycler ep Gradient, Model Although several species still remain without karyotypic information e. The range of Drymoreomys albimaculatus is relatively large and the species occurs in several protected areasbut it has only been found in seven localities and its habitat is threatened by deforestation and fragmentation.

Cytogenetic characteristics of Oryzomyini species of clade D, with diploid number 2n albimaculatjs, fundamental number FN drymoromys, morphologies of autosomal pairs and sex chromosomes, polymorphisms described and references. There is only one spine on the papilla nipple-like projection on the upper side of the penis. According to a phylogenetic analysis of evidence from morphologythe nuclear gene IRBPand the mitochondrial gene cytochrome bDrymoreomys albimaculatus is most closely related to Eremoryzomys poliusan oryzomyine from northern Peru and the only species in the genus Eremoryzomys.

These are albimaculafus identifiers and wlbimaculatus be used to cite UniProtKB entries. The statistical support for the nodes was estimated by the nonparametric bootstrap, with pseudoreplicates Felsenstein John Hopkins University Press, Baltimore: The mesolopha crest near the middle of the labial side of the tooth, is long and well developed on each of the three upper molars.


It has been found in disturbed and secondary forests as well as in pristine forest, but probably needs contiguous forest to survive.

Retrieved from ” https: However, the fauna of this biome is still barely known, such that discovery of new species is still common De Vivo et al. 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.

Drymoreomys – Wikipedia

The recently described taxon Drymoreomys albimaculatus is endemic to the Brazilian Atlantic Forest and its biology and genetics are still poorly known. The X is a large submetacentric, and the Y is a large submetacentric slightly smaller than the X Fig.

Drymoreomys albimaculatus Percequillo, Weksler, and Costa, Sample points prior to the plateau phase were discarded as burn-in, and the remaining trees were combined to find the maximum a posteriori probability estimated of the phylogeny.

A new genus and species of rodent from the Brazilian Atlantic Forest Rodentia: Oryzomyiniwith comments on Oryzomyine biogeography.

On M1, the anterocone the front cusp is divided into two cuspules on the lingual inner, towards the tongue and labial outer, towards the lips sides of the teeth.

Sigmodontinae based on the nuclear IRBP exon. The upper surface on the forefeet is covered with brown fur, and there is white or silvery fur on the digits. Biological Journal of the Linnean Society Albimaculahus specimens albimmaculatus were medium sized male body mass: Dorsal pelage was reddish-brown; ventral pelage was predominantly grayish.

Molecular Phylogenetics and Evolution 1: CBG-banding revealed pericentromeric constitutive heterochromatic blocks in all autosomes and in the long arm of Y Fig. In this sense, tandem fusions have perhaps played significant role in clade Dfymoreomys, resulting in the lower diploid numbers.


Although its range is relatively large and includes some protected areasit is patchy and threatened, and the discoverers recommend that the animal drymoreomts considered ” Near Threatened ” on the IUCN Red List.

Cricetidae from the Atlantic forest of southeastern Brazil. National Institutes of Health. As Drymoreomys albimaculatus exhibited the highest diploid number reported hitherto and diverged early in clade D, karyotype evolution in this clade based on the phylogeny Fig. Collection localities of Drymoreomys albimaculatus.

We thank two anonymous reviewers for their helpful comments. In other projects Wikimedia Commons Wikispecies. User Username Password Remember me. Molecular Phylogenetics dry,oreomys Evolution Mitotic plates were digitally captured with visible light or blue and green filters emission at and nm, respectively in an Axioskop 40 epifluorescence microscope Carl Zeiss equipped with an Axiocam camera and AxionVision software.

Cricetidae in Minas Gerais, Brazil. Author information Article drymoreo,ys Copyright and License information Disclaimer. On the sole, the pads are very large.

Bayesian analysis was performed using MrBayes 3. This suggests an evolutionary albikaculatus of decreasing chromosome number within the clade.

Both sex chromosomes are submetacentric with one arm noticeably longer than the otherand X is larger than Drymoreoms. Bulletin of the American Museum of Natural History InterPro serine-type peptidase activity Source: A rodent genus with one species in albimwculatus family Cricetidae from the Atlantic Forest of Brazil.

Branch support was estimated by Bayesian posterior probabilities BPP. The upper molar rows are either almost parallel or slightly convergent with each other toward the front.