Consulta: subjectFacets:"Akodontini"
Registros recuperados: 7
Data/hora: 16/06/2024 17:28:12

Testing the Rio Doce as a riverine barrier in shaping the Atlantic rainforest population divergence in the rodent Akodon cursor
Provedor de dados: 74
Autores: Colombi,Victor Hugo; Lopes,Silvia Ramira; Fagundes,Valéria.
Akodon cursor occurs in dense rainforest from northern (8º S) to southern (26º S) states along the Atlantic coast of Brazil. Previous karyological and molecular data revealed two major clades, one including northern (8-15º S) and the other southern (19-26º S) populations. The center of geographic distribution (15-20º S), which included the state of Espírito Santo, was identified as a potential vicariance region. Since river barriers are among the most discussed models in the study of Neotropical diversification, we examined whether the Rio Doce (19º S) plays an important role in shaping the population genetic divergence of A. cursor by including samples from Espírito Santo in the analysis. Our results showed that the northern-southern division region in...
Tipo: Info:eu-repo/semantics/other
Palavras-chave: Akodontini; Atlantic Forest; Cytochrome b; Gene flow; Phylogeography; Rodentia.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572010000400029

Miscellany on Bibimys (Rodentia, Sigmodontinae), a unique akodontine cricetid
Provedor de dados: 81
Autores: Pardiñas,Ulyses F. J; Voglino,Damián; Galliari,Carlos A.
Comen­tamos sobre la distribución geográfica de las 3 especies reconocidas de Bibimys, con énfasis en la especie tipo, B. torresi. Revisando brevemente su registro fósil postulamos que dicha especie sufrió una marcada retracción reciente. Sobre la base de unos pocos individuos colectados pertenecientes a B. chacoensis y B. torresi, describimos algunos rasgos externos como la dotación mamaria compuesta por 2 pares localizados más atrás en el cuerpo, 1 de ellos lateralmente a la genitalia. Combinando morfología con observaciones directas de un individuo en libertad postulamos que Bibimys no es una forma fosorial o semifosorial sino un sigmodontino especializado en la búsqueda activa de alimento empleando mayormente la nariz.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Akodontini; Anatomía; Bibimys chacoensis; Bibimys torresi; Distribución; Holoceno.
Ano: 2017
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S0327-93832017000100021

El género Akodon (Rodentia: Cricetidae) en Patagonia: estado actual de su conocimiento
Provedor de dados: 81
Autores: Pardiñas,Ulyses F. J.
Seis taxones fueron descriptos o citados en Patagonia bajo la actual extensión de Akodon (i.e., excluyendo Abrothrix). Estos, en orden cronológico de nominación, son: Akodon azarae (Fisch.), A. iniscatus Thos., A. iniscatus collinus Thos., A. neocenus Thos., A. nucus Thos. y St. Leger y A. molinae Contreras. Sus estatus taxonómicos y distribuciones son críticamente revisados. Las incertidumbres respecto del género en el área patagónica son destacadas.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Akodontini; Argentina; Distribución; Sigmodontinae; Taxonomía.
Ano: 2009
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S0327-93832009000100012

Supernumerary teeth in Necromys lasiurus (Rodentia, Cricetidae): the first record in sigmodontinae
Provedor de dados: 81
Autores: Simões Libardi,Gustavo; Reis Percequillo,Alexandre.
There are several kinds of anomalies related to the teeth reported in mammals, and one of them is known as supernumerary teeth and is commonly noticed in the literature, being reported in nearly all orders of mammals. Here, we report the occurrence of supernumerary molars in the sigmodontine rodent Necromys lasiurus, a common and widespread small rodent of tribe Akodontini. In order to assess the patterns of morphometric variation of N. lasiurus in eastern South America, we examined the skulls of 1763 specimens. The supernumerary molars were found in 2 individuals, which represent a frequency of 0.11%. The origin of super­numerary teeth started a long discussion on tooth homology, whether this anomaly is a result of heredity, a mutation or an atavism....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Akodontini; Brazil; Development; Extra teeth; Molar; Premolar.
Ano: 2014
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S0327-93832014000200003

A new genus for Habrothrix angustidens and Akodon serrensis (Rodentia, Cricetidae): again paleontology meets neontology in the legacy of lund
Provedor de dados: 81
Autores: Pardiñas,Ulyses F. J; Geise,Lena; Ventura,Karen; Lessa,Gisele.
Describimos un nuevo género de roedor sigmodontino para ubicar una especie fósil de los depósitos de Lagoa Santa, Habrothrix angustidens Winge y una especie viviente del sudeste de la Selva Atlántica descripta en los comienzos de la centuria pasada, Akodon serrensis Thos. Tentativamente, ambas formas son consideradas sinónimos a la espera de una revisión detallada de la diversidad del género. El nuevo género pertenece a la División Akodonde la diversa tribu Akodontini donde, sobre la base de evidencia molecular, resulta hermano de Thaptomys, otro akodontino especialista de selva. El nuevo género se caracteriza por una combinación única de rasgos morfológicos incluyendo una cola más corta que el largo cabeza-cuerpo, garras de los dedos de la mano y el pie...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Akodontini; Deltamys; Lagoa Santa; Muroidea; Selva Atlántica.
Ano: 2016
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S0327-93832016000100011

Geographic variation in skull shape of the water rat Scapteromys tumidus (Cricetidae, Sigmodontinae): isolation-by-distance plus environmental and geographic barrier effects?
Provedor de dados: 42
Autores: QUINTELA,FERNANDO M.; FORNEL,RODRIGO; FREITAS,THALES R.O.
ABSTRACT The geographic variation in skull size and shape of the swamp rat Scapteromys tumidus was examined in samples from eight geographic clusters in almost of its distribution in southern Brazil and Uruguay. For analysis we used two-dimensional geometric morphometric methods for dorsal, ventral and lateral views of the skull. The geometric descriptors showed no significant differences in skull size between geographic clusters, while differences in shape were highly significant. We found a significant and moderate correlation between geographic and morphological distances, corroborating the isolation-by-distance model. Samples from the Rio Grande do Sul central coastal plain were the most differentiated, segregating completely from all other samples in...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Akodontini; Isolation-by-distance; Geometric morphometrics; Skull morphology; Pampa.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652016000200451

Androlaelaps rotundus Fonseca (Acari: Laelapidae) associated with akodontine rodents in Paraguay: a morphometric examination of a pleioxenous ectoparasite
Provedor de dados: 57
Autores: GETTINGER,D.; OWEN,R. D.
A multivariate analysis of morphometric data suggests that the nominally pleioxenous ectoparasite, Androlaelaps rotundus, includes at least three distinct host-associated populations in Paraguay. Where multiple akodontine hosts occur sympatrically, each host species is accompanied by a morphologically distinct mite population. These host-mite associations were consistent across all localities, implying that A. rotundus is a complex of unrecognized species.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Ectoparasites; Laelapidae; Androlaelaps; Eubrachylaelaps; Akodontini; Akodon; Bolomys; Paraguay.
Ano: 2000
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0034-71082000000300007