The karyotype of <i>Trinomys paratus</i> (Rodentia: Echimyidae) with comments about its phylogenetic relationship

Lazar, Ana; Nacif, Camila Leitão; Weksler, Marcelo; Bonvicino, Cibele Rodrigues

doi:10.1515/mammalia-2016-0131

Cited by 5 publications

(7 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The interspecific grouping of Trinomys , recovered by the phylogenetic analyses, was congruent with previous studies ( Lara & Patton, 2000 ; Tavares, Pessôa & Seuánez, 2015 ; Lazar et al, 2017 ). Our phylogenetic analysis is also supported by the specimens’ distribution ( Fig.…”

Section: Discussionsupporting

confidence: 90%

“…The karyotypes described herein for T. s. setosus differed in 2 n , FN , and/or the sex chromosome morphology from those already published for this genus ( Yonenaga-Yassuda et al, 1985 ; Leal-Mesquita et al, 1992 ; Corrêa et al, 2005 ; Pessôa et al, 2005 ; Souza, Corrêa & Pessôa, 2006 ; Lazar et al, 2017 ; Table 1 ). Trinomys gratiosus bonafidei also has 2 n = 56 and FN = 108, but differently from our specimens, has a metacentric Y chromosome ( Pessôa et al, 2005 ).…”

Section: Discussioncontrasting

confidence: 57%

“…Closely related species of Trinomys seem to share the same karyotype, as is the case of the sister taxa Trinomys paratus and T. eliasi (both with 2 n = 58, FN = 112), and of T. dimidiatus and T. iheringi (both with 2 n = 60, FN = 116). In fact, it has been suggested that the divergence time among Trinomys species was not sufficient to produce great karyotypic changes ( Souza, Corrêa & Pessôa, 2006 ; Lazar et al, 2017 ).…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Cytogenetic analyses in Trinomys (Echimyidae, Rodentia), with description of new karyotypes

Araújo

Dias

Stumpp

et al. 2018

PeerJ

View full text Add to dashboard Cite

Trinomys Thomas (1921) is a terrestrial genus of spiny rats endemic to the Brazilian areas of Atlantic Forest and the transitional areas of Cerrado and Caatinga. Although most species have been already karyotyped, the available cytogenetic information is mostly restricted to diploid and fundamental numbers. We analyzed the chromosomes of two Trinomys species: Trinomys moojeni (2n = 56, FN = 106) and Trinomys setosus setosus (2n = 56, FN = 106 and 2n = 56, FN = 108). Our analyses included GTG- and CBG-banding, silver-staining of the nucleolar organizer regions, and chromosome mapping of telomeres and 45S rDNA by fluorescent in situ hybridization (FISH). Comparative GTG- and CBG-banding suggested that the interspecific variation may be due to rearrangements such as pericentric inversions, centromere repositioning, and heterochromatin variation. We report two new karyotypes for T. s. setosus and describe for the first time the banding patterns of the two Trinomys species.

show abstract

Section: Discussionsupporting

confidence: 90%

Section: Discussioncontrasting

confidence: 57%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Cytogenetic analyses in Trinomys (Echimyidae, Rodentia), with description of new karyotypes

Araújo

Dias

Stumpp

et al. 2018

PeerJ

View full text Add to dashboard Cite

show abstract

“…The karyotypes described herein for T. s. setosus differed in 2n, FN, and/or the sex chromosome morphology from those already published for this genus (Yonenaga-Yassuda et al, 1985;Leal-Mesquita et al, 1992;Corrêa et al, 2005;Pessôa et al, 2005;Souza, Corrêa & Pessôa, 2006;Lazar et al, 2017; Table 1). Trinomys gratiosus bonafidei also has 2n=56 and FN=108, but differently from our specimens, has a metacentric Y chromosome (Pessôa et al, 2005).…”

Section: Discussioncontrasting

confidence: 53%

“…As previously proposed by Leal-Mesquita et al (1992) Manuscript to be reviewed information alone is insufficient for taxonomic identification. In fact, several different species present very similar karyotypes (Lazar et al, 2017).…”

Section: Discussionmentioning

confidence: 99%

Peer Review #1 of "Cytogenetic analyses in Trinomys (Echimyidae, Rodentia), with description of new karyotypes (v0.2)"

2018

View full text Add to dashboard Cite

Trinomys Thomas (1921) is a terrestrial genus of spiny rats endemic to Brazilian areas of Atlantic Forest and transitional areas of Cerrado and Caatinga. Although most species have been already karyotyped, the available cytogenetic information is mostly restricted to diploid and fundamental numbers. We analyzed the chromosomes of two Trinomys species: T. moojeni (2n=56, FN=106) and T. setosus setosus (2n=56, FN=106 and 2n=56, FN=108). Our analyses included GTG-and CBG-banding, silver-staining of the nucleolar organizer regions, and chromosome mapping of telomeres and 45S rDNA by fluorescent in situ hybridization (FISH). Comparative GTG-and CBG-banding suggested that the interspecific variation may be due to rearrangements such as pericentric inversions, centromere repositioning, and heterochromatin variation. We report two new karyotypes for Trinomys s. setosus and describe for the first time the banding patterns of the two Trinomys species.

show abstract

Diversification of the cranium and mandible of spiny rats of the genus Trinomys (Rodentia: Echimyidae) in an environmental and phylogenetic context

Iaeger

Maestri

Fornel

2021

Journal of Mammalogy

View full text Add to dashboard Cite

Evolutionary constraints and ecological pressures influence species’ morphological diversity. The aim of this study was to explore patterns of morphological variation, to investigate the influence of environmental variables on morphological differentiation, and assess the strength of phylogenetic signal for the cranium and mandible in spiny rats of the genus Trinomys. We examined 377 crania and mandibles of all species of the genus Trinomys. We used geometric morphometric methods based on two-dimensional anatomical landmarks to describe cranium and mandible shape and size. Phylogenetic signal was tested using the K statistics and associations between morphology and environmental variables were made using a phylogenetic partial least squares analysis. We found marked differences in size and shape in the synchranium among species, especially in the segregation of T. albispinus and T. yonenagae from the other species, which in turn greatly overlapped both in size and shape spaces. We found a weak phylogenetic signal for size of the synchranium and intermediate phylogenetic signals for shape, a pattern similar to other studies. Differentiation of the synchranium shape in Trinomys was associated largely with precipitation-related variables, while the association between size and environmental variables was weak. Notably, Trinomys species inhabiting xeric environments had relatively larger tympanic bullae.

show abstract

The karyotype of Trinomys paratus (Rodentia: Echimyidae) with comments about its phylogenetic relationship

Abstract: The spiny rat

Cited by 5 publications

References 14 publications

Cytogenetic analyses in Trinomys (Echimyidae, Rodentia), with description of new karyotypes

Cytogenetic analyses in Trinomys (Echimyidae, Rodentia), with description of new karyotypes

Peer Review #1 of "Cytogenetic analyses in Trinomys (Echimyidae, Rodentia), with description of new karyotypes (v0.2)"

Diversification of the cranium and mandible of spiny rats of the genus Trinomys (Rodentia: Echimyidae) in an environmental and phylogenetic context

Contact Info

Product

Resources

About