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Bristle-spined Porcupine - Wikipedia, the free encyclopedia It is commonly placed with the New World porcupines in the family Erethizontidae or with the spiny rats the family Echimyidae. Characteristics of the premolar suggest that it belongs with the Echimyidae, but characteristics of the incisor enamel suggest that it belongs in the Erethizontidae. Patterson and Pascual (1968), Patterson and Wood (1982), Woods (1982, 1984, 1993) Patton and Reig (1989), Nowak (1999), and Carvalho (2000) support the inclusion of this animal in the Echimyidae whereas Martin (1994), McKenna and Bell (1997), and Carvalho and Salles (2004) argue that it belongs in the Erethizontidae. en.wikipedia.org /wiki/Bristle-spined_Porcupine   (525 words)

Spiny rat - Wikipedia, the free encyclopedia The spiny rats are a group of hystricognath rodents in the family Echimyidae. Most species do not do well in conditions of high heat and aridity and are restricted to regions with an abundant source of water. The Thin-spined Porcupine, Chaetomys subspinosus, is often included in the Echimyidae due to similarities in the premolar. en.wikipedia.org /wiki/Spiny_rat   (270 words)

Family Echimyidae or spiny rats Animals / Mammals / Rodentia (1987) / Hystricognathi (228) / Echimyidae (78) An interesting feature of spiny rats is the ease with which their tails break off. In the second year, I manipulated resource density to test the hypothesis that spiny rats are not food-limited during the rainy season (the season of resource abundance). www.thewebsiteofeverything.com /animals/mammals/Rodentia/Echimyidae   (211 words)

Center for Ecology and Conservation Biology Trinomys mirapitanga, a new species of spiny rat (Rodentia: Echimyidae) from the Brazilian Atlantic Forest. Evolutionary diversification of spiny rats (genus Trinomys, Rodentia: Echimyidae) in the Atlantic Forest of Brazil. Effects of body size and home range on access to mates and paternity in male bridled nailtail wallabies. www.bu.edu /cecb/faculty/lara.html   (431 words)

Bioline International Official Site (site up-dated regularly) (Echimyidae) and 17 specimens of Nectomys squamipes (Sigmodontinae) for the presence of hantavirus infections. This was a reason why we analyzed infection status of Echimyidae rodent Thrichomys spp. Inapparent exposure to hantavirus infected rodents have led to human morbidity and to an occasional fatality in research labs, emphasizing the need for vigilance in screening laboratory rodents for hantavirus infections. www.bioline.org.br /request?oc04122   (1358 words)

Currículo do Sistema de Currículos Lattes (Sérgio Furtado dos Reis) MONTEIRO, L. Morphological evolution in the mandible of spiny rats, genus Trinomys (Rodentia: Echimyidae). PESSÔA, L. Morphological affinities of Proechimys yonenagae Rocha, 1995 (Rodentia: Echimyidae): Evidence from bacular and cranial characters. BANDOUK, A. Cranial differentiation and evolution in Thrichomys apereoides in northeastern Brazil (Rodentia: Echimyidae). buscatextual.cnpq.br /buscatextual/visualizacv.jsp?id=K4787294J0   (3497 words)

Medscape MEDLINE search: Rodentia Trichuris pampeana Suriano and Navone, 1994 (Nematoda: Trichuridae) is redescribed from voucher specimens from the type host Ctenomys azarae Thomas, 1903 (Rodentia: Octodontidae) and from parasites collected from 2 populations of the subterranean rodent C. from J Parasitol - Feb 2005 - M Alejandra Rossin Ecomorphological diversification among South American spiny rats (Rodentia; Echimyidae): a phylogenetic and chronological approach. The phylogeny of South American spiny rats (Rodentia; Echimyidae) was studied using the exon 28 of the von Willebrand Factor nuclear gene (vWF). search.medscape.com /uslclient/searchMedline.do?queryText=Rodentia   (1201 words)

Rat,Mammals,Rat Picture,Mammal Pictures,Catalog,Encyclopedia   (Site not responding. Last check: 2007-11-01) Rat is the common name for about 1,000 species of rodents in 70 genera and eight families. These species include the kangaroo rats, Dipodomys, family Heteromyidae; wood rats, Neotoma, family Cricetidae; spiny rats, Proechimys, family Echimyidae; and the typical rats, Rattus, family Muridae. Most rodents called rats have an elongated body, a moderately pointed snout, approximately equal-length legs, and a long, sparsely haired or hairless tail. www.4to40.com /earth/geography/htm/mammalsindex.asp?counter=132   (619 words)

RODENTIA   (Site not responding. Last check: 2007-11-01) Four hypotheses for the migration routes of the hystricognath rodents during the Eocene (55–34 Myr) may be proposed. In collaboration with Jim Patton and Yuri Leite, we are exploring the echimyid phylogeny using a concatenation of nuclear DNA markers (vWF, GHR, IRBP, BRCA1). Evolution of south american spiny rats (Rodentia, Echimyidae) : the star-phylogeny hypothesis revisited. www.isem.univ-montp2.fr /PPP/PM/RES/Phylo/Rod/@Rodents.php   (1636 words)

Papéis Avulsos de Zoologia (São Paulo) - A new species of Echimys Cuvier, 1809 (Rodentia, Echimyidae) from Brazil   (Site not responding. Last check: 2007-11-01) Emmons, L.H.; Leite, Y.R.; Kock, D. and Costa, L.P. A review of the named forms of Phyllomys (Rodentia, Echimyidae), with the description of a new species from coastal Brazil. Leite, Y.L.R. Evolution and Systematics of the Atlantic tree rats, genus Phyllomys (Rodentia, Echimyidae) with description of two new species. Oliveira, T.G. and Mesquita, E.R.L. Notes on the distribution of the white faced tree rat, Echimys chrysurus (Rodentia, Echimyidae) in northeastern Brazil. www.scielo.br /scielo.php?pid=S0031-10492005000500001&script=sci_arttext&tlng=en   (3219 words)

Extinct mammals This genus represents a radiation of 'spiny rats' (family: Echimyidae) into the northern Greater Antilles. These animals have not been formally reviewed, but we follow Hall (1981) in recognizing only a single genus that incorporates Homopsomys of Puerto Rico, Brotomys of Hispaniola and Boromys of Cuba. Various authors have proposed survival of the genus into the 19th or even 20th century, but without direct radiometric evidence. faculty.jsd.claremont.edu /dmcfarlane/extinctmammals/mammals/heteropsomys.html   (85 words)

IngentaConnect Relationships among extant and fossil echimyids (Rodentia: Hystri...   (Site not responding. Last check: 2007-11-01) The echimyid rodents are the most diverse group of Neotropical hystricognaths, with approximately 40 extant and fossil genera. A data matrix of 54 taxa and 50 characters is constructed and submitted to parsimony analyses using PAUP and WinClada programs. Based on this phylogenetic hypothesis, patterns of tooth evolution in Echimyidae are discussed, and minimum ages for the divergence events within the family are estimated. www.ingentaconnect.com /content/bsc/zoj/2004/00000142/00000004/art00001   (283 words)

Yuri Leite - Current Research - ASM Poster Neotropical spiny rats, family Echimyidae (sensu McKenna and Bell 1997), are the most taxonomically, ecologically, and morphologically diverse of all living hystricognath rodents. The earliest fossils date from the Late Oligocene (25 MYBP), but modern taxa only appeared in the fossil record in the Late Miocene (6.8-9 MYBP). The identity of Winge's Lasiuromys villosus and the description of a new genus of echimyid rodent (Rodentia: Echimyidae). ib.berkeley.edu /labs/patton/yuri/asmposter.html   (1132 words)

AMNH Scientific Publications: Item 2246/3503   (Site not responding. Last check: 2007-11-01) In addition, a fossil collected by Lund at Lagoa Santa, Brazil, and referred by Winge to the genus now known as Isothrix, is clearly closely allied to it. The fossil may represent an undescribed species, but there is insufficient material to be confident in distinguishing it from C. pictus at this time. Callistomys shows some resemblances to Mid-Miocene and earlier fossil Echimyidae, and it may be more closely related to these than to other extant genera"--P. Description: digitallibrary.amnh.org /dspace/handle/2246/3503   (221 words)

Evolution and Systematics of the Atlantic Tree Rats, Genus Phyllomys (Rodentia, Echimyidae), With Description of Two ... Evolution and Systematics of the Atlantic Tree Rats, Genus Phyllomys (Rodentia, Echimyidae), With Description of Two New Species I address the tectonic, climatic, and vegetation changes in eastern Brazil since the Pliocene that set the stage for the diversification of Phyllomys and likely played a role in the phylogeographic patterns observed today. Yuri L. Leite, "Evolution and Systematics of the Atlantic Tree Rats, Genus Phyllomys (Rodentia, Echimyidae), With Description of Two New Species" (July 1, 2003). repositories.cdlib.org /ucpress/ucpz/vol_132   (350 words)

Publisher description for Library of Congress control number 2004297025 Publisher description for Evolution and systematics of the Atlantic Tree Rats, genus Phyllomys (Rodentia, Echimyidae), with description of two new species / Yuri L.R. Leite. This study focuses on the Atlantic Forest tree rats of the genus Phyllomys (Rodentia: Echimyidae), one of the most poorly understood mammal genera inhabiting the coastal rain forests Brazil, the most threatened lowland tropical forest in the world. The author summarizes their distribution, ecology and evolution, using a combination of morphological and molecular analyses, describes two new species, and provides the first systematic revision of the genus, which was originally described in 1839. www.loc.gov /catdir/description/ucal051/2004297025.html   (153 words)

Publications A review of the spiny mouse genus Scolomys(Rodentia: Muridae: Sigmodontinae) with the description of a new species from the western Amazon of Brazil. Gene genealogy and differentiation among arboreal spiny rats (Rodentia, Echimyidae) of the Amazon basin: a test of the Riverine Barrier Hypothesis. We provide a revised diagnosis and description of the genus while describing the third species, suggest phylogenetic affinities of the genus within the tribe Oryzomyini, and summarize aspects of the ecology and life history of the new species. ib.berkeley.edu /labs/patton/publications.html   (2794 words)

Evolution and Systematics of the Atlantic Tree Rats, Genus Phyllomys (Rodentia, Echimyidae), With Description of Two ... Evolution and Systematics of the Atlantic Tree Rats, Genus Phyllomys (Rodentia, Echimyidae), With Description of Two New Species (University of California Publications in Zoology) by Yuri Leite, New, Used Books, Cheap Prices, ISBN 0520098498 Evolution and Systematics of the Atlantic Tree Rats, Genus Phyllomys (Rodentia, Echimyidae), With Description of Two New Species (University of California Publications in Zoology) All such content is provided to you "as is." this content and your use of it are subject to change and/or removal at any time. www.bookfinder4u.com /detail/0520098498.html   (403 words)

19(3) Vaz, S.M. Sobre a ocorrência de Callistomys pictus (Pictet) (Rodentia, Echimyidae) (631-635) On the occurrence of Callistomys pictus (Pictet) (Rodentia, Echimyidae). A study on the geographical distribution of Callistomys pictus (Pictet, 1843) based on specimens conserved in museums, bibliography informations, and field observations is presented. zoo.bio.ufpr.br /sbz/19(3).htm   (5551 words)

trabalhos iheringi iheringi (Rodentia, Echimyidae), from the State of São Paulo, Brazil. cytogenetic analysis of two species of Proechimys (Echimyidae, Rodentia) from the Caatinga domain of the State of Bahia, Fagundes, V. and Yonenaga-Yassuda, Y. - Synaptonemal complex analysis of Trichomys apereoides (Rodentia, Echimyidae) www.ib.usp.br /~yyassuda/trabalhos.htm   (1293 words)

Karyologic evidence of diversification of the genus Thrichomys (Rodentia, Echimyidae) - Karger Publishers Karyologic evidence of diversification of the genus Thrichomys (Rodentia, Echimyidae) - Karger Publishers Karyologic evidence of diversification of the genus Thrichomys (Rodentia, Echimyidae) Department of Genetics, Universidade Federal do Rio de Janeiro, Rio de Janeiro (Brazil) content.karger.com /ProdukteDB/produkte.asp?Aktion=ShowAbstract&ProduktNr=224037&Ausgabe=228766&ArtikelNr=66613   (214 words)

Nutria, Myocastor coypus (Rodentia: Echimyidae) @ Insect Images Nutria, Myocastor coypus (Rodentia: Echimyidae) @ Insect Images Mammalia > Rodentia > Echimyidae > Myocastor coypus (Molina) Insect Images is a joint project of The Bugwood Network and USDA Forest Service. www.insectimages.org /browse/subimages.cfm?SUB=4334   (76 words)

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