The complete mitochondrial genomes of two Atlantic spiny rats, genus Trinomys (Rodentia: Echimyidae), from low-pass shotgun sequencing

Araújo, Naiara Pereira; Dias, Guilherme B.; Amaro, Beatriz Dias; Kuhn, Gustavo C. S.; Svartman, Marta

doi:10.1016/j.genrep.2016.08.003

Cited by 2 publications

(1 citation statement)

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“…In order to do this, we sequenced the 401 bp-long segment of the mitochondrial cytochrome b (cyt b ) of each specimen and included sequences from nine Trinomys species retrieved from GenBank in a phylogenetic analysis. The sequences of the specimens MCN-M2816 ( T. moojeni ) and UFMG 6024 ( T. s. setosus ) were previously deposited in GenBank after assembly of their mitochondrial genomes ( Araújo et al, 2016 ). Euryzygomatomys spinosus, Fischer, 1814, was used as outgroup.…”

Section: Methodsmentioning

confidence: 99%

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

Araújo

Dias

Stumpp

et al. 2018

PeerJ

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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.

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Section: Methodsmentioning

confidence: 99%

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

Araújo

Dias

Stumpp

et al. 2018

PeerJ

Self Cite

View full text Add to dashboard Cite

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Hidden diversity of the genus Trinomys (Rodentia: Echimyidae): phylogenetic and populational structure analyses uncover putative new lineages

Nacif

Bastos

Mello

et al. 2022

Zoological Journal of the Linnean Society

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Trinomys, one of the most species-rich spiny rat genera in Brazil, is widely distributed in Caatinga, Cerrado and Atlantic Forest biomes, and currently includes ten recognized species, three of which are polytypic. Although some studies employing molecular data have been conducted to better characterize phylogenetic relationships among species, 19 nominal taxa have been suggested, implying considerable incongruence regarding species boundaries. We addressed this incongruence by intensively sampling all species across the geographic distribution of the genus. In addition to publicly available data, we generated 182 mt-Cytb gene sequences, and employed phylogenetic and computational species delimitation methods to obtain a clearer picture of the genus diversity. Moreover, we evaluated populational diversity within each accepted species, considering their geographical distribution and a timescale for the evolution of the genus. Beyond confirming the general patterns described for the evolution of the group, this new analysis suggests that Trinomys is comprised of at least 16 evolutionary lineages, 13 of them recognized as species or subspecies, and three never before characterized. This study highlights the importance of increased sample sizes and computational species delimitation methods in uncovering hidden diversity in Trinomys.

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The complete mitochondrial genomes of two Atlantic spiny rats, genus Trinomys (Rodentia: Echimyidae), from low-pass shotgun sequencing

Cited by 2 publications

References 20 publications

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

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

Hidden diversity of the genus Trinomys (Rodentia: Echimyidae): phylogenetic and populational structure analyses uncover putative new lineages

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