The Diversification of Extant Angiosperms in the South America Dry Diagonal

Collevatti, Rosane Garcia; Lima, Natácia Evangelista de; Vitorino, Luciana Cristina

doi:10.1007/978-3-030-31167-4_21

Cited by 12 publications

(19 citation statements)

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“…The middle Pleistocene witnessed the split among several South American plant, vertebrate and invertebrate lineages (Collevatti et al., 2020; Turchetto‐Zolet et al., 2013). Similarly, divergences between lineages of B. raniceps dated from 0.26 to 0.52 Ma (Table S6, Appendix 2).…”

Section: Discussionmentioning

confidence: 99%

“…The South American Diagonal of Open Formations (DOF) is a large and well‐connected belt of seasonally dry biomes between Amazonia and the Atlantic Forest (Werneck, 2011). The DOF is composed of three biomes, seasonally stressed by drought and stretching from north‐eastern to south‐western South America: the Caatinga (seasonally dry tropical forest), the Cerrado (tropical savanna) and the Gran Chaco (semi‐arid forests and woodlands) (Collevatti et al., 2020; Pennington et al., 2006). The main promoters for the diversification of the DOF biota are the compartmentalization of the Central Brazilian Plateau (CBP) in the Tertiary (final uplift, ~5 Ma) and climatic oscillations of the Quaternary (after ~2.6 Ma) (Colli, 2005; Werneck, 2011).…”

Section: Introductionmentioning

confidence: 99%

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Isolation by environment and recurrent gene flow shaped the evolutionary history of a continentally distributed Neotropical treefrog

Camurugi

Gehara

Fonseca

et al. 2020

Journal of Biogeography

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Aim Phylogeographic studies show how historical and current changes in landscapes shape the geographic distribution of genetic diversity in species of animals and plants. In particular, for the species of the Diagonal of Open Formations (DOF), the compartmentalization of the Central Brazilian Plateau (CBP) during the Tertiary and climatic oscillations during the Quaternary have often been invoked to explain the origin and current patterns of biodiversity. We investigated how landscape changes and climatic oscillations shaped the distribution and diversification history of a widespread South American treefrog. Location South American Diagonal of Open Formations (DOF) including Caatinga, Cerrado, and Chaco biomes. Taxon Treefrog Boana raniceps. Methods We used a multi‐locus dataset from 288 individual frogs collected at 115 localities throughout most of the species’ distribution. We used population assignment analysis, species distribution models, historical demography models, approximate Bayesian computation and landscape genetic analyses to test alternative hypotheses of diversification. Results We found two genetic lineages that diverged during the mid‐Pleistocene with continued gene flow. Approximate Bayesian computation supported a scenario of isolation with migration until the Last Glacial Maximum, followed by more recent population expansion in north‐eastern Brazil and stability at the southwest in South America. Isolation by environment was the best predictor of genetic distance between populations, which is in accordance with their different environmental niches. As Boana raniceps is a lowland species, steep slopes in the CBP likely restrained gene flow enough to sustain population divergence. We found evidence for major range contraction during the Last Glacial Maximum, raising the possibility of synergic action of climate change and the CBP compartmentalization in regulating migration. Main conclusions Our findings highlight how landscape and climatic changes can shape the diversification of DOF biota. Past climatic fluctuations and environmental resistance due to topography acted in concert, forming a semipermeable barrier to gene flow, promoting intraspecific differentiation in a continentally distributed species.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Isolation by environment and recurrent gene flow shaped the evolutionary history of a continentally distributed Neotropical treefrog

Camurugi

Gehara

Fonseca

et al. 2020

Journal of Biogeography

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“…nov. is widely distributed in the Cerrado but is also recorded from the Chaco. The Cerrado, Chaco and other biomes such as the Caatinga are part of the South American Dry Diagonal, presenting environmental and faunal similarities (Vanzolini 1963;Prado & Gibbs 1993;Collevatti et al 2020). Records from iNaturalist (Fig.…”

Section: Eggmentioning

confidence: 99%

Arumatia, a new genus of Diapheromerinae stick insects (Insecta, Phasmatodea) from Brazil, with description of five new species and reassessment of species misplaced in Australian genera

Ghirotto

Crispino

Engelking

et al. 2022

EJT

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Two species of stick insect with a distinctive morphology, Candovia evoneobertii (Zompro & Adis, 2001) and Echetlus fulgens Zompro, 2004, were considered to be native to Australia and introduced into Brazil. However, Heteronemia dubia (Caudell, 1904) and Heteronemia fragilis (Brunner von Wattenwyl, 1907), both described more than a hundred years ago from South America, exhibit striking similarities with the two purportedly introduced species and are found to be conspecific with C. evoneobertii. Careful analysis of the literature and specimens revealed that these species belong to the Neotropical tribe Diapheromerini (Diapheromeridae) and represent a new genus, Arumatia Ghirotto gen. nov. We therefore propose Arumatia fulgens (Zompro, 2004) gen. et comb. nov. and Arumatia dubia (Caudell, 1904) gen. et comb. nov. We further redescribe A. dubia (Caudell, 1904) gen. et comb. nov. based on several specimens and synonymize Heteronemia fragilis syn. nov. and Candovia evoneobertii syn. nov. under it. Additionally, five new Brazilian species are described: Arumatia diamante Ghirotto gen. et sp. nov. from Abaíra, Bahia; Arumatia aramatia Ghirotto gen. et sp. nov. from Porto Nacional, Tocantins; Arumatia motenata Ghirotto gen. et sp. nov. from Serra do Cipó, Minas Gerais; Arumatia crassicercata Ghirotto, Crispino & Engelking gen. et sp. nov. from Alto Paraíso de Goiás, Goiás; and Arumatia anyami Ghirotto, Crispino & Neves gen. et sp. nov. from Costa Marques, Rondônia. Species of Arumatia gen. nov. occur mostly in the Cerrado domain, and represent the first Diapheromeridae recorded in this area. Most species are known exclusively from females with only A. aramatia gen. et sp. nov. and A. motenata gen. et sp. nov. known from both sexes. Adult and egg morphology are described and illustrated in detail for all species, as well as the nymph stages for A. dubia. Biological observations are presented, including parthenogeny in A. dubia and one of the few detailed accounts of sexual behaviour in Euphasmatodea (for A. motenata gen. et sp. nov.). Finally, a species of Diapheromerini described in error from Brazil, Diapheromera armata Piza, 1973, is synonymized under the North American Megaphasma denticrus (Stål, 1875) (syn. nov.).

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“…Current absence of taxa in the Cerrado may thus be due to more humid conditions and more pronounced rainfall seasonality (Neves et al 2015; see Figs. 2 and 3) that also favor the occurrence of fires (Miranda et al 2009), but general climate of the area currently occupied by Cerrado appears to have been drier during Quaternary glacial periods (Collevatti et al 2020, Oliveira et al 2020. Examples of other species distributed across the eSADD are also available for anurans (Santos et al 2009;Vasconcelos et al 2019), geckos (Werneck et al 2012), lizards (Fonseca et al 2018;Ledo et al 2020), birds (Rocha et al 2020), and arthropods (Zanella 2011, Bartoleti et al 2018, though many of these groups show connections to the neighboring domains, especially the Atlantic Forest.…”

Section: Biogeographic Patterns Within and Around The Dry Diagonalsmentioning

confidence: 99%

“…The first notion of SADD refers to the concatenation of sub-humid, dry and semiarid domains stretching from northeastern Brazil into northwestern Argentina formed by the Caatinga, Cerrado and Chaco domains (Fig. 1A; Prado and Gibbs 1993, Werneck et al 2012, Santos-Silva et al 2013, Fouquet et al 2014, Azevedo et al 2020a, Collevatti et al 2020, Ledo et al 2020, Neves et al 2020, Rocha et al 2020, Masa-Iranzo et al 2021. The second refers to the arid and hyperarid domains distributed from southern Argentina into southwestern Ecuador formed by Patagonia, Monte, Prepuna, dry Puna and the Atacama and Peruvian deserts (Fig.…”

Section: Introductionmentioning

confidence: 99%

The two South American dry diagonals

Luebert¹

2021

Frontiers of Biogeography

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South American drylands roughly form two diagonals both termed in the biogeographical literature as the "South American dry diagonal" (SADD). However, they correspond to two different geographical areas. One comprises the Caatinga, Cerrado and Chaco domains, thus encompassing the areas between northeastern Brazil and northwestern Argentina. The other stretches from Patagonia in southern Argentina to the Pacific deserts of northern Chile and Peru, thus also including the Monte, Prepuna and dry Puna domains. I termed them the eastern and western SADDs, respectively (i.e., eSADD and wSADD). In this mini review I attempt to summarize the major climatic features of the two South American dry diagonals, their possible origins, biogeographical patterns within and around them and to explore possible interconnections. The eSADD is generally more humid than the wSADD and has more pronounced rainfall seasonality, with precipitation concentrated in summer, while the wSADD tends to be less seasonal due to year-round aridity, with little precipitation largely occurring in winter. The origin of both diagonals appears to go back to the middle Miocene, associated with global cooling. Biogeographical studies show that these diagonals are important in structuring South American distribution patterns south of the Equator, both acting as barriers for humid-adapted lineages and corridors for arid-adapted taxa. Remarkably, the two diagonals appear to have few plant and animal taxa in common, which may explain why biogeographers speaking about one diagonal seem to ignore the existence of the other. Highlights• Two South American regions have been referred to as the South American dry diagonals.• The first comprises the Caatinga, Cerrado and Chaco domains. The second encompasses Patagonia, Monte, Prepuna, dry Puna and Pacific Desert. • These two diagonals are key in structuring South American distribution patterns, acting both as dispersal barriers and corridors. • They appear to have little in common, both floristically and faunistically.

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The Diversification of Extant Angiosperms in the South America Dry Diagonal

Cited by 12 publications

References 60 publications

Isolation by environment and recurrent gene flow shaped the evolutionary history of a continentally distributed Neotropical treefrog

Isolation by environment and recurrent gene flow shaped the evolutionary history of a continentally distributed Neotropical treefrog

Arumatia, a new genus of Diapheromerinae stick insects (Insecta, Phasmatodea) from Brazil, with description of five new species and reassessment of species misplaced in Australian genera

The two South American dry diagonals

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