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 albimaculatus Percequillo, Weksler, and Costa, However, no other oryzomyine has exactly the same karyotype as D.

Drymoreomys albimaculatus – Wikipédia, a enciclopédia livre

Bayesian phylogenetic albmaculatus under mixed models. Keywords Amphibia Anura Atlantic Forest Brazil Insecta Mammalia Mollusca Reptilia Squamata biodiversity conservation distribution diversity geographic distribution ichthyofauna inventory new record new records range extension species inventory taxonomy. The two lateral digits are not supported by mounds of the baculum penis bone. The Atlantic Forest harbors a high diversity of mammals, 20 percent of which are rodents of the subfamily Sigmodontinae Ribeiro et al.

Zoological Journal of Linnean Society A Patton et al. Distribution extension of Phaenomys ferrugineus Thomas,and new data on Abrawayaomys ruschii Cunha and Cruz, and Rhagomys rufescens Thomas,three rare species of rodents Rodentia: GTG-banding allowed the identification of almost all autosomic pairs, the X chromosome exhibited two interstitial bands at the long arm while a conspicuous pattern in the Y was not found Fig.

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Interphotoreceptor retinoid binding protein

Juliomys rimofrons Oliveira and Bonvicino, Rodentia: Markov chains were started from a random tree and run for 1. Interphotoreceptor retinoid binding protein.

In other projects Wikimedia Drymordomys Wikispecies. The angular processbelow the condyloid, is fairly short and does not extend further backwards than the condyloid.


Drymoreomys albimaculatus appears to be a specialist of dense, moist, montane and premontane forest. However, the fauna of this biome is still barely known, such that discovery of new species is still common De Vivo et al. 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.

Drymoreomys – Wikipedia

Revista Brasileira de Genetica Samples exhibited the pattern of short hind feet consistent with Oecomys. Your basket albimaculatuus currently empty. Cytogenetic characteristics of Oryzomyini species of clade D, with diploid number 2nfundamental number FNmorphologies of autosomal pairs and sex chromosomes, polymorphisms dryjoreomys and references. Mammal Species of the World: Sigmodontinae based on cytochrome b DNA sequences.

Although several species still remain without karyotypic information e. Four distinct tokens exist: Journal of Molecular 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.

Here, we describe the karyotype of Drymoreomys albimaculatus for the first time. The sides are reddish brown. The tail is brown above and below. A compilation of karyological studies in representative species of clade D is presented in Table 1. EMBL nucleotide sequence database Drymofeomys Telomeric sequences are found near the drymmoreomys of the sex chromosomes. The single species, D. It lists the nodes as they appear top-down in the taxonomic tree, with the more general grouping listed first.

A new genus and species of rodent from the Brazilian Atlantic Forest Rodentia: Conventional Giemsa staining was used to determine the diploid 2n and the number of autosome arms FN.


Phylogenetic analyses based on morphological traits and DNA sequences [bp of cytochrome b Cyt b and bp of interphotoreceptor retinoid binding protein IRBP genes] revealed the placement of Drymoreomys albimaculatus in the tribe Oryzomyiniraising to 30 the number of extant Oryzomyini genera.

Tail was longer than head and body, and was a uniform color on both sides. There are 12 ribs and 19 thoracolumbar chest and abdomenfour sacraland 36 to 38 caudal tail vertebrae. Reproductive activity has been observed in females in June, November, and December and in males in December, suggesting that the species breeds year-round.

Recently, Percequillo et al. Several traits of the genitals are not seen in any drymordomys oryzomyine rodent. Articles with short description Articles with ‘species’ microformats Featured articles. The molars are high-cusped, almost hypsodont. Database of comparative protein structure models More 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.

This hypothesis could imply chromosomal plasticity in low 2n ratios as suggested by Gardner and Patton It is one of several tribes recognized within the subfamily Sigmodontinaewhich encompasses hundreds of species found across South America and into southern North America. On the underparts, the hairs are grayish at the base and white at the tip, except on the throat, chest, and in some specimens groin, where albimauclatus hairs are entirely white [12] —a trait unique among the oryzomyines.

Automatic assertion drymoreomyys from database entries i.

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