Contribuição a identificação e distribuição das subespecies de Lutreolina crassicaudata (Desmarest) (Marsupialia, Mammalia)

Graipel, Maurício Eduardo; Miller, Paul R.; Ximenez, Alfredo

doi:10.1590/s0101-81751996000300026

Cited by 8 publications

(7 citation statements)

References 2 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The list of specimens examined follows: IADIZA 3299, 3302, 3304, 3428, 3429, 3297, 3296, 3427, 3298, plus 1 uncataloged specimen;CML 802, 803, 805, 806, 807, 809, 810, 811, 918, 919, 1353;MACN 43.21, 43.37, 43.73, 52.76, 13069, 13265, 13285, 13713, 14904, 15365, 17267, 17268, 17923, 19190, 19191, 20809, 30248, 32233, 34547, 39466, 45101, 49242. Specimens ranged from 36.7 mm (a just-weaned juvenile with M 2 erupting) to 83.6 mm (an adult with heavily worn dentition) in total length of skull. Although males tend to be larger than females (Graipel et al 1996), both sexes were pooled together in a single sample because overlaid regression lines of each sex were virtually identical by visual inspection in all variables.…”

Section: Methodsmentioning

confidence: 99%

Cranial ontogeny ofLutreolina crassicaudata (Didelphidae): a comparison withDidelphis albiventris

2003

View full text Add to dashboard Cite

2003. Cranial ontogeny of Lutreolina crassicaudata (Didelphidae): a comparison with Didelphis albiventris. Acta Theriologica 48: 1-9.Metatherians experience the greatest developmental changes during extrauterine life. Following previous studies on Didelphis albiventris Lund, 1840, we examined the postweaning cranial allometry of size of the Neotropical marsupial Lutreolina crassicaudata (Desmerest, 1804). Our aim was to compare growth patterns of both species to identify traits particular to each species and traits common to both species. This may contribute toward identifying a common developmental plan for didelphids. We measured 15 cranial variables in 32-43 specimens from just-weaned young to old adult. Total length of the skull was the estimator of overall size in least squares and reduced major axis regressions. The skull of Lutreolina crassicaudata grows at a rate slower than the overall change in size in its neurocranial components, palate, and postcanine rows, and it grows relatively faster in the rest of the splanchnocranium. This pattern closely resembles that of Didelphis albiventris, from which it differs mainly in the allometry of the muzzle. In both species, allometry explains most postweaning changes of the trophic apparatus on functional grounds, in relation to interspecific differences in diet. We hypothesize that most local allometric departures from a generalized didelphid plan would relate to main dietary trends.

show abstract

Section: Methodsmentioning

confidence: 99%

Cranial ontogeny ofLutreolina crassicaudata (Didelphidae): a comparison withDidelphis albiventris

2003

View full text Add to dashboard Cite

show abstract

“…REMARKS: Although several morphologically diagnosed subspecies of Lutreolina have been treated as valid by authors (e.g., Thomas, 1923;Ximénez, 1967;Graipel et al, 1996;Stein and Patton, 2008b), no published analysis of molecular variation has tested the implicit assumption that only a single species occurs across the vast range of South American landscapes from which specimens have been collected.…”

mentioning

confidence: 99%

Phylogenetic Relationships and Classification of Didelphid Marsupials, an Extant Radiation of New World Metatherian Mammals

Voss

Jansa

2009

Bulletin of the American Museum of Natural History

311

443

View full text Add to dashboard Cite

“…All of these populations are assigned to the nominotypical subspecies (Marshall 1978;Luna et al 2002;Stein andPatton 2007 [2008]), the type locality of which has been restricted by Cabrera (1957) to Asunción, Paraguay. However, some authors (e.g., Graipel et al 1996) have argued that at least 2 subspecies are present in southern South America, L. c. crassicaudata and L. c. paranalis Thomas, 1923, the latter with its type locality in Las Rosas, Santa Fe, Argentina. In addition, 3 other nominal forms, with type localities in the eastern range of Lutreolina, bonaria Thomas, 1923 (Los Yngleses, Buenos Aires, Argentina), lutrilla Thomas, 1923 (Sa ˜o Lourenço do Sul, Rio Grande do Sul, Brazil), and travassosi Miranda- Ribeiro, 1936 (Guariba, Sa ˜o Paulo, Brazil), are considered synonyms of L. crassicaudata (Fig.…”

mentioning

confidence: 99%

“…Although comprehensive reviews on the taxonomic history and synonymy of the forms associated to L. crassicaudata are available (Thomas 1923;Cabrera 1957;Ximénez 1967;Marshall 1978;Graipel et al 1996;Stein andPatton 2007 [2008]), their taxonomic status remains poorly understood. Although partial assessments of morphological variation have been conducted (e.g., Graipel et al 1996), to date no morphological study has included populations from the montane Yungas forest of northwestern Argentina and southwestern Bolivia, nor has any analysis of DNA sequence variation been published.…”

mentioning

confidence: 99%

A new species of lutrine opossum, genusLutreolinaThomas (Didelphidae), from the South American Yungas

et al. 2014

View full text Add to dashboard Cite

This study presents the most comprehensive systematic revision of the genus Lutreolina to date, by means of genetic (mitochondrial DNA of 22 specimens) and morphologic (assessment of 262 specimens) evidence. Molecular analyses were based on cytochrome-b gene sequences from 22 individuals collected at 18 localities from Argentina, Bolivia, Brazil, Paraguay, and Uruguay, which are currently allocated to L. crassicaudata. Results indicate that Lutreolina has sharp phylogeographic structure, with 2 reciprocally monophyletic groups (2.7% divergent, whereas intraclade variation is minimal) occurring east and west of the Dry Chaco, where Lutreolina is absent. The eastern clade includes populations from eastern Paraguay, northeastern central Argentina, southern Brazil, and Uruguay. These populations were traditionally allocated to the subspecies L. c. crassicaudata and L. c. paranalis, whose monophyly is not supported in our study. Therefore, eastern populations are all assigned here to the nominotypic subspecies. The western clade is restricted to montane Yungas forests of northwestern Argentina and southern Bolivia, a very different environment from those inhabited by Lutreolina elsewhere (i.e., lowland savannah grasslands). The populations from the Yungas also are morphologically distinct, in size, shape, and in discrete characters of the skull and dentition. We found that these populations belong to a different species than that of the eastern lowlands. Because no taxonomic name is available to apply to these populations, we name and describe a new species of lutrine opossum to encompass them.

show abstract

Contribuição a identificação e distribuição das subespecies de Lutreolina crassicaudata (Desmarest) (Marsupialia, Mammalia)

Cited by 8 publications

References 2 publications

Cranial ontogeny ofLutreolina crassicaudata (Didelphidae): a comparison withDidelphis albiventris

Cranial ontogeny ofLutreolina crassicaudata (Didelphidae): a comparison withDidelphis albiventris

Phylogenetic Relationships and Classification of Didelphid Marsupials, an Extant Radiation of New World Metatherian Mammals

A new species of lutrine opossum, genusLutreolinaThomas (Didelphidae), from the South American Yungas

Contact Info

Product

Resources

About