Variation of craniodental traits in russet rats Euryoryzomys russatus (Wagner, 1848) (Rodentia: Cricetidae: Sigmodontinae) from Eastern Atlantic Forest

Libardi, Gustavo Simões; Percequillo, Alexandre Reis

doi:10.1016/j.jcz.2016.03.005

Cited by 10 publications

(5 citation statements)

References 43 publications

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“…Among Neotropical sigmodontine rodents, this topic was poorly addressed, with only few examples in which such kind of patterns were described. For example, Libardi & Percequillo (2016) found a N-S clinal variation of some cranial measurements in the Atlantic forest dweller Euryoryzomys russatus. Similarly, Pearson & Smith (1999) and Teta & Pardiñas (2014) reported changes in the overall size of the body of Abrothrix olivacea and the skull of A. hirta across a same large environmental gradient in southern Argentina and Chile.…”

Section: Discussionmentioning

confidence: 99%

“…First, we grouped the individuals of nearby localities to obtain larger samples for the statistical analyses (see Musser, 1968;Vanzolini, 1970). We follow a criterion of geographic proximity and absence of major geographical barriers among localities, as well as the lack of obvious discrepancies in size and shape among groups (see Brennand et al, 2013;Libardi & Percequillo, 2016 for a similar procedure). Under this method, the following groups were established ( Fig.…”

Section: Methodsmentioning

confidence: 99%

“…To conduct these analyses, only localities with >10 specimens were included. A similar procedure was employed by Libardi & Percequillo (2016) to detect clinal patterns of variation in Euryoryzomys russatus (Sigmodontinae, Oryzomyini). All analyses were made with the software InfoStat (Di Rienzo et al, 2008).…”

Section: Methodsmentioning

confidence: 99%

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Geographic variation in quantitative skull traits and systematic of southern populations of the leaf-eared mice of the Phyllotis xanthopygus complex (Cricetidae, Phyllotini) in southern South America

Teta

Jayat

Lanzone

et al. 2018

Zootaxa

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The leaf-eared mice of the genus Phyllotis (Cricetidae, Phyllotini) encompasses at least 20 species of medium-sized Neotropical rodents mostly distributed throughout the Andean region. Its limits and contents were reviewed by several authors, based both on morphological and molecular data. However, no integrative approaches were conducted based on large samples of individuals with a wide geographical coverage. The purposes of this paper are: (i) to evaluate species limits; and (ii) to test the congruence between molecular and quantitative morphological evidences within the Phyllotis xanthopygus complex in southern South America. Our results questioned the specific status of P. bonariensis, a geographically isolated form that was either considered as a valid species or as a synonym of P. xanthopygus. Quantitative morphological (size and shape of the skull) and molecular data linked P. bonariensis with populations from central Argentina traditionally referred as P. xanthopygus vaccarum. Individuals belonging to populations from southern Argentina and Chile (P. x. xanthopygus) were remarkably homogeneous in their skull morphology, showing a subtle to non-existent differentiation from those of north-central and west-central Argentina referred to P. x. vaccarum. We found some incongruence between groups inferred from morphological (this work) and mitochondrial DNA results of previous studies. This is the case of the north-central and west-central populations, where morphological traits do not show the strong differentiation detected by molecular characters. Our results highlight the need for integrative taxonomic studies, not only to delimitate taxonomic units but also for a better and more comprehensive understanding of population variability and differentiation.

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Section: Discussionmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

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Geographic variation in quantitative skull traits and systematic of southern populations of the leaf-eared mice of the Phyllotis xanthopygus complex (Cricetidae, Phyllotini) in southern South America

Teta

Jayat

Lanzone

et al. 2018

Zootaxa

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“…(2021), we constructed Dice‐Leraas diagrams (modified from Hubbs & Hubbs, 1953) showing the median, the 25%–75% quartiles and the minimum and maximum values (calculated on the base of the geometric mean of each individual). We used specimens of age classes 2 and 3, including only those localities with more than 10 specimens (in some cases, we grouped geographically close localities to achieve this minimum sample size; see Libardi & Percequillo, 2016 for a similar analysis).…”

Section: Methodsmentioning

confidence: 99%

The Phyllotis xanthopygus complex (Rodentia, Cricetidae) in central Andes, systematics and description of a new species

et al. 2021

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Phyllotis Waterhouse 1837 is one of the most studied genera of South American cricetid rodents. As currently understood, it includes 20 small to medium‐sized species of predominantly rocky habitats. Among them, populations of the yellow‐rumped leaf‐eared mouse, traditionally referred to P. xanthopygus (Waterhouse 1837), are the most widely distributed, extending from central Peru to southern Chile and Argentina. Based mostly on molecular evidence, previous studies suggested that P. xanthopygus constitutes a species complex, being characterized by geographically structured and genetically divergent clades. In this work, we compare the molecular phylogenetic hypothesis for populations distributed on the eastern slopes of the central Andes with morphometric evidence using univariate and multivariate analyses. Quantitative morphological and molecular evidence suggests that at least four nearly cryptic species of the P. xanthopygus complex occur from southern Bolivia to west‐central Argentina. Three of these taxa have available names; one of them, P. caprinus, is currently recognized to the species level; the other two, the clades of P. x. posticalis‐P. x. rupestris and P. vaccarum, are both recognized as subspecies of P. xanthopygus. The remaining taxon represents a new species distributed in the west‐central Andes of Argentina. We discuss our morphological results in the light of other sources of evidence (e.g. qualitative and quantitative state characters, genetic and phylogenetic studies, and cytogenetic data) and name the new species as P. pehuenche, honouring the original native people that historically inhabited west‐central Andes of Argentina.

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“…A pesar de que nuestro conocimiento de los roedores del BAI avanzó substancialmente en los últimos 20 años, todavía subsisten numerosas lagunas de conocimiento, tanto taxonómicas como distribucionales: I) algunas especies nunca han sido registradas (e. g., Blarinomys breviceps) o muy escasamente (e. g., Abrawayaomys ruschii) a través de muestreos con trampas; II) los escasos registros para algunos taxones podrían deberse a su confusión con otras especies más comunes y ampliamente distribuidas (e.g., Akodon paranaensis o Castoria angustidens con Akodon montensis; Calomys tener con Calomys laucha); III) el estatus taxonómico de algunas formas nominales con localidad tipo en esta provincia no ha sido revisado mediante metodologías modernas (e.g., Brucepattersonius guarani, B. misionensis, B. paradisus, Oligoryzomys flavescens antoniae); IV) a nivel cromosómico, los cariotipos de los roedores misioneros son pobremente (e. g. Nectomys squamipes) o nulamente conocidos (e.g., Calomys tener, Abrawayaomys ruschii, Blarinomys breviceps, Oligoryzomys nigripes), muchas veces obtenidos de unos pocos especímenes y localidades; V) la variabilidad molecular intra y/o interpoblacional de muchas de estas especies es poco entendida y fue estudiada principalmente en un contexto taxonómico y/o filogenético (Pardiñas et al, , 2005Francés & D´Elía, 2006;González-Ittig et al, 2010;De Almeida Chiquito et al, 2014); VI) la congruencia entre patrones filogeográficos y de variación morfológica ha sido relativamente bien estudiada para algunas especies en la porción brasilera del BA, pero casi sin incluir especímenes de Misiones (e. g., Cordero Moreira & de Oliveira, 2011; Caldara Junior & Leite, 2012;Libardi & Percequillo, 2016); VII) muchos de los datos disponibles para ensambles comunitarios corresponden a trampeos realizados entre las décadas de 1960 y 1980, en una etapa previa al impacto antrópico generado por la masividad de las forestaciones con exóticas y el avance de la frontera agrícola hacia el norte.…”

Section: _____________ Introducciónunclassified

Diversity, systematic and conservation of rodents from the southwestern end of the Interior Atlantic Forest.

Lanzone

Labaroni²,

Formoso³

et al. 2018

MACN

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Diversity, systematic and conservation of rodents from the southwestern end of the Interior Atlantic Forest. We present a synthesis of the current knowledge of the rodents from the province of Misiones, Argentina, with emphasis on taxonomic, chromosomal, biogeographic and conservation issues. In this province, the order is represented by 7 families: Sciuridae (1 genus, 1 species), Cricetidae (17, 24), Caviidae (2, 2), Cuniculidae (1, 1), Dasyproctidae (1, 1), Echymyidae (3, 3) and Erethizontidae (1, 1). From 1 to 5 species-depending on taxonomic authorities-are endemic to Misiones. We briefly discuss some taxonomic problems, highlighting those questions that still persist (e.g., the complex situation of the genus Brucepattersonius). For several species, we provide novel chromosome data and compare it with the information available for Brazil. An analysis of the species richness at the provincial level indicates that the highest values for this parameter occur towards the south-central portion of the territory, in an area of interdigitation between the Interior Atlantic Forest and the ecoregion of Campos y Malezales. We discuss the role of large rivers in the region as barriers to the dispersal of this fauna (e.g., the Paraná between Argentina and eastern Paraguay). At least 9 species of rodents with distribution in the province of Misiones have been classified under some category of threat or near to the threat. In all cases, the survival of these taxa depends on maintaining the integrity and connectivity between forest remnants.

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Variation of craniodental traits in russet rats Euryoryzomys russatus (Wagner, 1848) (Rodentia: Cricetidae: Sigmodontinae) from Eastern Atlantic Forest

Cited by 10 publications

References 43 publications

Geographic variation in quantitative skull traits and systematic of southern populations of the leaf-eared mice of the Phyllotis xanthopygus complex (Cricetidae, Phyllotini) in southern South America

Geographic variation in quantitative skull traits and systematic of southern populations of the leaf-eared mice of the Phyllotis xanthopygus complex (Cricetidae, Phyllotini) in southern South America

The Phyllotis xanthopygus complex (Rodentia, Cricetidae) in central Andes, systematics and description of a new species

Diversity, systematic and conservation of rodents from the southwestern end of the Interior Atlantic Forest.

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