Detecting morphological limits between parapatric species: cranial variation in<i>Cerradomys</i>(Cricetidae: Sigmodontinae) from northeastern Brazil

Caccavo, Aldo; Oliveira, João Alves de

doi:10.1093/jmammal/gyw124

Cited by 5 publications

(2 citation statements)

References 29 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A number of species that were previously considered as endemic to the Caatinga, the Cerrado, or both, are not considered endemic to those geographic units in this study because: (1) our criterion to deem a species as endemic is stricter than that used by other authors (see Methods); or (2) recently published information demonstrate that these species are present in biomes other than the Caatinga and the Cerrado; or because (3) we do not consider them valid species. Due to either of the former two criteria, we excluded the following species from our list of endemics: Calomys tener , Cerradomys langguthi , Cerradomys vivoi , Cerradomys maracajuensis , Cerradomys subflavus , Ctenomys brasiliensis , Ctenomys nattereri , Clyomys laticeps , Dasyprocta azarae , Guerlinguetus poaiae , Kunsia tomentosus , Phyllomys blainvillii , Pseudoryzomys simplex , Rhipidomys macrurus , Thrichomys laurentius (see Cordeiro-Estrela et al 2006, de la Sancha et al 2011, Bezerra 2015, Bezerra and Bonvicino 2015b, Bidau 2015, Patton and Emmons 2015, Percequillo 2015, Pessôa et al 2015a, Salazar-Bravo 2015, de Vivo and Carmignotto 2015, Voss 2015a, Caccavo and Oliveira 2016). Besides the cases of Alouatta ululata and Coendou baturitensis , which we do not consider valid species (see discussion of cases above), we adhere to recent synopses of mammal genera provided by various authors, and do not recognize the following names as corresponding to valid species: Guerlinguetus poaiae , Urosciurus urucumus , Dasyprocta nigriclunis , and Rhipidomys cearanus (see Patton and Emmons 2015, Tribe 2015, de Vivo and Carmignotto 2015).…”

Section: Discussionmentioning

confidence: 99%

The mammalian faunas endemic to the Cerrado and the Caatinga

Gutiérrez¹,

Marinho‐Filho²

2017

View full text Add to dashboard Cite

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.

show abstract

Section: Discussionmentioning

confidence: 99%

The mammalian faunas endemic to the Cerrado and the Caatinga

Gutiérrez¹,

Marinho‐Filho²

2017

View full text Add to dashboard Cite

show abstract

“…1 ). Caccavo & Oliveira (2016) have morphologically analyzed samples of Cerradomys from Alagoas, but they were not able to identify these individuals since some morphological attributes of C. langguthi and C. vivoi from this region overlap.…”

Section: Discussionmentioning

confidence: 99%

Species limits and recent diversification ofCerradomys(Sigmodontinae: Oryzomyini) during the Pleistocene

Di-Nizo

Suárez-Villota

Silva

2022

PeerJ

View full text Add to dashboard Cite

Cerradomys is a genus of the tribe Oryzomyini with eight species currently recognized, and a controversial taxonomy. These species are mainly distributed in the South America dry diagonal, but some species extend into Atlantic Forest, reaching the coastal sandy plains known as Restingas. This study aimed to address species limits and patterns of diversification of Cerradomys species. For this purpose, we performed cytogenetic and molecular analyses (phylogeny, coalescent species delimitation, barcoding, and divergence times estimation) using multiple mitochondrial and nuclear markers on a comprehensive sampling, representing all nominal taxa reported so far. Chromosomal information was a robust marker recognizing eight Cerradomys species. Reciprocal monophyly was recovered for all the species, except for C. subflavus. These results together with coalescent analyses recovered eight species as the most congruent species delimitation scenario for the genus (mean Ctax: 0.72). Divergence time estimates revealed that Cerradomys’ diversification occurred about 1.32 million years ago (Mya) during the Pleistocene. Although our results conservatively support the eight Cerradomys species described so far, different lines of evidence suggest that C. langguthi and C. subflavus could potentially be species-complexes. We discussed this scenario in the light of multiple evolutionary processes within and between species and populations, since Cerradomys comprises a species group with recent diversification affected by Pleistocene climatic changes and by the complex biogeographic history of South America dry diagonal. This work supports that the diversity of Cerradomys is underestimated and reiterates that interdisciplinary approaches are mandatory to identify small rodent species properly, and to unhide cryptic species.

show abstract