A new species of Calomys (Rodentia: Sigmodontinae) from Eastern Brazil

Bonvicino, Cibele Rodrigues; Oliveira, João Alves de; Gentile, Rosana

doi:10.11646/zootaxa.2336.1.2

Cited by 33 publications

(32 citation statements)

References 24 publications

(23 reference statements)

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“…According to our results, the union between O. eliurus and O. delticola exhibits short branch lengths in the WP and BMCMC total evidence tree, and the K2P distance value for the cyt B gene between these two species is low (~3%), a value close to that obtained for subspecies in other related sigmodontine taxa (Steppan, 1998;Smith & Patton, 1999;Palma et al, 2005a;this study). We obtained strong support for the relationship between O. delticola and O. eliurus, and other studies have proposed O. delticola to be a junior synonym of O. nigripes (Bonvicino & Weksler, 1998;Francés & D'Elía, 2006), based on karyotypes and GTG-banding similarities. Further work based on morphology and chromosomes have stated that it is difficult to separate O. delticola and O. eliurus from O. nigripes (Weksler & Bonvicino, 2005), and more recently Paresque et al (2007) (Fig.…”

Section: Discussionsupporting

confidence: 83%

“…Capture and handling procedures followed guidelines approved by the American Society of Mammalogists (Gannon et al, 2007). According to Musser & Carleton's (2005) species account, we lack six species of Oligoryzomys, for which samples were unavailable: a new form described from Brazil, Oligoryzomys stramineus (Bonvicino and Weksler, 1998); Oligoryzomys griseolus (Osgood, 1912) from Venezuela, of which there have been no recent captures (M. Aguilera to R.E. Palma, pers.…”

Section: Dna Sequencing and Alignmentmentioning

confidence: 99%

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Phylogenetic relationships of the pygmy rice rats of the genus Oligoryzomys Bangs, 1900 (Rodentia: Sigmodontinae)

Palma¹,

Rodríguez‐Serrano²,

Rivera-Milla³

et al. 2010

Zoological Journal of the Linnean Society

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Sequences from two mitochondrial genes (cytochrome b and NADH1) were used to produce a molecular phylogeny for 12 named and two undescribed species of the genus Oligoryzomys. All analyses placed Oligoryzomys microtis as the most basal taxon, a finding consistent with previous studies that suggested the west-central Amazon as a centre of origin for the tribe Oryzomyini to which Oligoryzomys belongs. Biogeographically, this suggests that Oligoryzomys had a South American origin, and later advanced northwards, entering Central America and Mexico more recently. Different analyses have provided consistent support for several additional clades that did not necessarily agree with the species groups hypothesized by previous studies. A molecular clock derived for these data suggests an origin for the genus of 6.67 Mya, with most speciation within the genus occurring between 3.7 and 1.5 Mya.

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Section: Discussionsupporting

confidence: 83%

Section: Dna Sequencing and Alignmentmentioning

confidence: 99%

Phylogenetic relationships of the pygmy rice rats of the genus Oligoryzomys Bangs, 1900 (Rodentia: Sigmodontinae)

Palma¹,

Rodríguez‐Serrano²,

Rivera-Milla³

et al. 2010

Zoological Journal of the Linnean Society

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“…Although it is plausible that the specimens reported by Geise et al (1996) were indeed Calomys expulsus , this cannot be assumed as certain because multiple species of Calomys might occur in Lagoa Santa (not only Calomys expulsus ). In fact, Lagoa Santa is also the type locality of Calomys tener (see Winge 1887, Salazar-Bravo 2015), and the identity of the specimens from Lagoa Santa that were the basis of Geise et al’s (1996) report has also been attributed to Calomys cerqueirai (Bonvicino et al 2010; see also Colombi and Fagundes 2015, Salazar-Bravo 2015 and citations therein). Examination of the specimens from which Geise et al (1996) obtained the reported karyotypes, and comparisons of their morphologies with respect to type material of Calomys expulsus , would be necessary to evaluate whether Gurgel-Filho et al’s (2015) conjecture is correct.…”

Section: Resultsmentioning

confidence: 99%

“…Calomys tocantinsi is endemic to the Cerrado, and has been recorded in the Brazilian states of Mato Grosso and Tocantins (Bonvicino et al 2003, 2010, Cordeiro-Estrela et al 2006, Rocha et al 2011a). …”

Section: Resultsmentioning

confidence: 99%

“…These species include Oligoryzomys utiaritensis , Rhipidomys ipukensis , and an undescribed species of Akodon , all of which occur in transitional areas between the Brazilian Cerrado and the Amazon (Rocha 2011b, Pardiñas et al 2015, Weksler and Bonvicino 2015); it is unclear whether they are restricted to those transitional areas, or if they are rather Cerrado, or Amazon, endemics with presence in the contact zones between these two biomes. Similarly, Calomys cerqueirai and Phyllomys brasiliensis are known from transitional areas between the Cerrado and the Atlantic Forest (Bonvicino et al 2010, Leite and Loss 2015, Salazar-Bravo 2015); it remains to be investigated whether these species are restricted to those transitional areas, or if they are rather Cerrado, or Atlantic Forest, endemics with presence in the contact zones between these biomes.…”

Section: Discussionmentioning

confidence: 99%

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The mammalian faunas endemic to the Cerrado and the Caatinga

Gutiérrez¹,

Marinho‐Filho²

2017

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Citation: Gutiérrez EE, Marinho-Filho J (2017) The mammalian faunas endemic to the Cerrado and the Caatinga. ZooKeys 644: 105-157. https://doi.org/10.3897/zookeys.644.10827 AbstractWe undertook a comprehensive, critical review of literature concerning the distribution, conservation status, and taxonomy of species of mammals endemic to the Cerrado and the Caatinga, the two largest biomes of the South American Dry-Diagonal. We present species accounts and lists of species, which we built with criteria that, in our opinion, yielded results with increased scientific rigor relative to previously published lists -e.g., excluding nominal taxa whose statuses as species have been claimed only on the basis of unpublished data, incomplete taxonomic work, or weak evidence. For various taxa, we provided arguments regarding species distributions, conservation and taxonomic statuses previously lacking in the literature. Two major findings are worth highlighting. First, we unveil the existence of a group of species endemic to both the Cerrado and the Caatinga (i.e., present in both biomes and absent in all other biomes). From the biogeographic point of view, this group, herein referred to as Caatinga-Cerrado endemics, deserves attention as a unit -just as in case of the Caatinga-only and the Cerrado-only endemics. We present preliminary hypotheses on the origin of these three endemic faunas (Cerrado-only, Caatingaonly, and Caatinga-Cerrado endemics). Secondly, we discovered that a substantial portion of the endemic mammalian faunas of the Caatinga and the Cerrado faces risks of extinction that are unrecognized in the highly influential Red List of Threatened Species published by the International Union for Conservation of Nature (IUCN). "Data deficient" is a category that misrepresents the real risks of extinction of these species considering that (a) some of these species are known only from a handful of specimens collected in a single or a few localities long ago; (b) the Cerrado and the Caatinga have been sufficiently sampled to guarantee collection of additional specimens of these species if they were abundant; (c) natural habitats RESEARCH ARTICLE Launched to accelerate biodiversity research A peer-reviewed open-access journalEliécer E. Gutiérrez & Jader Marinho-Filho / ZooKeys 644: 105-157 (2017) 106 of the Cerrado and the Caatinga have been substantially altered or lost in recent decades. Failures either in the design of the IUCN criteria or in their application to assign categories of extinction risks represent an additional important threat to these endemic faunas because their real risks of extinctions become hidden. It is imperative to correct this situation, particularly considering that these species are associated to habitats that are experiencing fast transformation into areas for agriculture, at an unbearable cost for biodiversity.

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