Extension of the geographic distribution of Plecturocebus baptista (Pitheciidae, Primates) and a possible hybrid zone with Plecturocebus hoffmannsi: evolutionary and conservation implications

Rocha, Alessandro; Barnett, Adrian; Spironello, Wilson Roberto

doi:10.1590/1809-4392201803411

Cited by 5 publications

(3 citation statements)

References 18 publications

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“…) suggests they might represent a distinct species. Finally, our record of P. baptista is located within the range currently hypothesized for P. hoffmannsi, as observed also by Rocha et al (2019) and Printes et al (2018). Further field surveys and taxonomic research are necessary to clarify if there is a natural hybrid zone between these two species or if these titis represent a clinal variation of a single species--as it is currently hypothesized for P. cinerascens and the recently described P. parecis (Byrne et al, 2021).…”

Section: Resultssupporting

confidence: 90%

A dataset of new occurrence records of primates from the arc of deforestation, Brazil

Costa-Araújo,

Canale,

de Melo

et al. 2023

Preprint

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The arc of deforestation, located between the southern Amazonia and the northern Cerrado of Brazil, is a top deforestation frontier worldwide. The high deforestation rates in this region are caused by human activities and threatens a rich diversity of primates that are still poorly-known and therefore investments into taxonomy and distribution research are urgent to support science-driven conservation of primates of this region. Here we present a dataset of 192 new occurrence records for 22 species of primates of the generaAlouatta,Aotus,Ateles,Cebus,Chiropotes,Lagothrix,Leontocebus,Pithecia,Plecturocebus,Saimiri, andSapajus, collected during 10 field expeditions carried out across the arc of deforestation between 2015–2018. Based on these occurrence records we extend the ranges ofSaimiri collinsi,Sapajus apella, andAlouatta puruensis, identify a potential hybridization zone betweenA. puruensisandAlouatta discolor, and redefine the range ofPlecturocebus moloch. Moreover, this dataset is a useful source of information otherwise scarce for further researches on species distributions and habitat use patterns, on the effect of environmental variables on such patterns, for estimating population sizes, evaluating habitat suitability, for predicting effects of climate change, habitat loss and fragmentation on populations, and for assessing species extinction risks. The ranges of primates endemic to the arc of deforestation, with a few exceptions, are fragile hypotheses, which hampers the establishment of effective conservation efforts for species increasingly threatened on a global deforestation frontier.

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Section: Resultssupporting

confidence: 90%

A dataset of new occurrence records of primates from the arc of deforestation, Brazil

Costa-Araújo,

Canale,

de Melo

et al. 2023

Preprint

View full text Add to dashboard Cite

show abstract

“…Latitude Longitude Species We found a group of P. baptista within the range of P. hoffmannsi. Our observations reinforce previous findings of Rocha et al (2019) and Printes et al (2018). Although Plecturocebus baptista and P. hoffmannsi are easily distinguished by their pelage color, we suggest that their phenotypes might be a clinal variation of a single species as is currently pro-posed for P. parecis and P. cinerascens (Byrne et al, 2021).…”

Section: Localitysupporting

confidence: 94%

A dataset of new occurrence records of primates from the arc of deforestation, Brazil

Costa-Araújo,

Canale,

de Melo

et al. 2024

Primate Biol.

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Abstract. The so-called arc of deforestation is a major agricultural and industrial frontier in southern Amazonia and northern Cerrado of Brazil. As arboreal mammals, the primates in this region are therefore threatened by forest loss and fragmentation. At the same time, knowledge about the taxonomic diversity and distribution ranges of these taxa is incomplete, which might hamper efficient conservation measurements. New species have been recently discovered in this region, and their ranges remain imprecise because only a few occurrence records are available for each species. Here we present 192 new records of 22 species and subspecies of Alouatta, Aotus, Ateles, Cebus, Chiropotes, Lagothrix, Leontocebus, Pithecia, Plecturocebus, Saimiri, and Sapajus, collected in 56 different localities during 10 field expeditions across the arc of deforestation between 2015 and 2018. Based on these new records, we extend the ranges of Alouatta puruensis, Ateles chamek, and Saimiri collinsi; identify potential hybridization zones between A. puruensis and A. discolor, and between At. chamek and At. marginatus; redefine the range of Plecturocebus moloch; and clarify the ranges of P. baptista and P. hoffmannsi. Moreover, these results and the dataset are valuable for further research on, for example, species distribution and habitat use modeling, for assessing species extinction risks, and for supporting efforts for the conservation of species increasingly threatened on a global deforestation frontier.

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“…Extensions of the known range of Amazonian titi monkeys have been reported in Brazil (Monção et al, 2008; Quintino & Bicca-Marques, 2013; Printes et al, 2018; Rocha et al, 2019), Bolívia (Martinez & Wallace, 2021) and Peru (Vermeer et al, 2011), with new reports of sympatry (Printes et al, 2018; Rocha et al, 2019) showing that the geographical distribution of Amazonian titi monkeys is more complex than was previously thought. Prince Bernhard's titi monkey Plecturocebus bernhardi (Plate 1) is one such example.…”

Section: Introductionmentioning

confidence: 92%

Using population surveys and models to reassess the conservation status of an endemic Amazonian titi monkey in a deforestation hotspot

Silva

Pacca²,

Lemos³

et al. 2022

Oryx

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Assessing the conservation status of species is essential for implementing appropriate conservation measures. A lack of evidence of threats, rather than showing an absence of impacts, could reflect a lack of studies on how human activities could result in species population declines. The range of Prince Bernhard's titi monkey Plecturocebus bernhardi is restricted to the Arc of Deforestation, a deforestation hotspot in south-eastern Amazonia. Despite this, it is categorized as Least Concern on the IUCN Red List. To reassess the conservation status of P. bernhardi, we carried out surveys during 2015–2017 to delimit the geographical distribution of the species and estimate its population density and abundance. We then used spatial predictive modelling to examine future habitat and population loss within its range. Plecturocebus bernhardi occurs over an area of 131,295 km2. Its mean group size was 2.8 individuals/group and its density 10.8 individuals/km2 and 3.8 groups/km2. Habitat loss was estimated to be 58,365 km2 (32.3% of its current range) over the next 24 years (three P. bernhardi generations) under a conservative governance model of deforestation and 105,289 km2 (58.3%) under a business-as-usual model. These numbers indicate that P. bernhardi is threatened and should be categorized as Vulnerable, at least, using the IUCN Red List criteria. We recommend the reassessment of other Least Concern primate species from the Arc of Deforestation using a similar approach.

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Extension of the geographic distribution of Plecturocebus baptista (Pitheciidae, Primates) and a possible hybrid zone with Plecturocebus hoffmannsi: evolutionary and conservation implications

Cited by 5 publications

References 18 publications

A dataset of new occurrence records of primates from the arc of deforestation, Brazil

A dataset of new occurrence records of primates from the arc of deforestation, Brazil

A dataset of new occurrence records of primates from the arc of deforestation, Brazil

Using population surveys and models to reassess the conservation status of an endemic Amazonian titi monkey in a deforestation hotspot

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