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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Drymoreomys – Wikipedia

This article has been cited by other articles in PMC. The palate is short, with its back margin between the third molars. The X is a large submetacentric, and the Y is a large submetacentric slightly smaller than the X Fig. Branch support was estimated by Bayesian posterior probabilities BPP.

The pads on the hindfeet are very well developed and there is brown fur on the upper sides of the feet. Pelage color and external measurements were taken during the fieldwork. The mandible lower jaw is long and low.

Robersonian rearrangements could have occurred in this group as well, since some species of clade D present the same FN but different 2n and number of biarmed chromosomes e. On the urethral processlocated in the crater at the end of akbimaculatus penis, a fleshy process at the side, the lateral lobuleis present. Non-Robertsonian mechanisms such as pericentric inversions, unequal translocations, or whole-arm heterochromatin addition or deletion could also be invoked in those cases of changes in FN but not in 2n e.


This suggests an evolutionary trend of decreasing chromosome number within the clade.

Both sex chromosomes are submetacentric with one arm noticeably longer than the otherand X is larger than Y. In this sense, tandem fusions have perhaps played significant role in clade D, resulting in the lower diploid numbers.

Cytogenetic and Genome Research The crests on the braincase and interorbital region are weakly developed. Molecular Biology and Evolution The best ML tree had a albimaculatuw likelihood score ofConventional Giemsa staining was used to determine the diploid 2n and the number of autosome arms FN.

Drymoreomys albimaculatus – Wikipédia, a enciclopédia livre

Your basket is currently empty. Do not show this banner again. Both extraction and PCR controls were used for each amplification. The name refers to the animal’s occurrence in mountain forest. Reproductive activity has been observed in females in June, Alibmaculatus, and December and in males in December, suggesting that the species breeds year-round.

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These external morphological alimaculatus overlapped with those of the Drymoreomys albimaculatus holotype Percequillo et al. Journal of Molecular Evolution The typical heterochromatic pattern of sex chromosomes is also found in most of the oryzomyine species and it is an essential condition for the recognition of the Y Fig.


Article Tools How to cite item. These reiterate the importance of further fieldwork effort, with different collecting methods in order to increase the spectrum of small mammals collected.

Nuclear and mitochondrial DNA sequences from the two karyotyped individuals verify the taxonomic identity as the recently described Drymoreomys albimaculatus and confirm the relationship of the species with other Oryzomyini. From Wikipedia, the free encyclopedia. Bulletin of the American Museum of Natural History: A new genus and species of rodent from the Brazilian Atlantic Forest Rodentia: Albimxculatus in the Atlantic forest of southeastern Brazil.

drymorromys On the sole, the pads are very large. The tail is brown above and below. Although several species still remain without karyotypic information e. For both analyses we used gene-specific unlinked models. June 16, Last modified:

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