Spatiotemporal Diversification of Tree Squirrels: Is the South American Invasion and Speciation Really That Recent and Fast?

Abreu-Jr, Edson Fiedler de; Pavan, Silvia E.; Tsuchiya, Mirian T. N.; Wilson, Don E.; Percequillo, Alexandre Reis; Maldonado, Jesús E.

doi:10.3389/fevo.2020.00230

Cited by 20 publications

(6 citation statements)

References 68 publications

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“…The Neotropics is arguably one of the most prolific regions in terms of radiations (Abreu‐Jr et al, 2020; Harvey et al, 2020). This is partly due to its complex geo‐climatic history, including major landscape changes such as the closure of the Isthmus of Panama, the Andean uplift and the climatic cycles of the Pleistocene, which promoted biotic interchanges, isolated populations causing speciation and provided the environmental conditions for adaptation and range evolution of ecologically diverse organisms (Hoorn et al, 2010; Smith & Klicka, 2010; Thom et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

Biogeography of a neotropical songbird radiation reveals similar diversification dynamics between montane and lowland clades

Buainain

Ferreira

Avendaño

et al. 2022

Journal of Biogeography

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Aim Continental evolutionary radiations provide opportunities to understand how landscape evolution and biotic factors interact to generate species diversity. Additionally, understanding whether diversification dynamics differ between montane and lowland environments is a long‐standing question with few comparative analyses in the Neotropics. To address these questions, we investigated the biogeographical patterns and the evolutionary processes underlying the diversification of a songbird genus, and compared diversification dynamics of clades occurring in lowland and montane Neotropical habitats. Location Neotropical montane and lowland forests. Taxon Arremon(Aves: Passerellidae). Methods We sequenced genomic data (ultra‐conserved elements, UCEs) of 92 individuals (including historical skin specimens) comprising 47 of 50 currently recognized subspecies in the genus and collected habitat association data to (1) build the most complete phylogenetic hypothesis for the genus to date using maximum likelihood and Bayesian methods with a concatenated matrix, and a multi‐species coalescent method based on quartets; and (2) reconstruct the evolution of their ancestral ranges, habitat association and diversification rates. Results All phylogenetic methods recovered essentially the same topology with strong support values for most interspecific nodes revealing relationships among species. We found evidence for a montane and humid ancestral range in Central America in the late Miocene and a later expansion into the lowlands of Central America, as well as into the lowlands and mountains of South America. Despite some temporal variation in diversification rate, we found overall similar diversification dynamics between montane and lowland clades. Main conclusion Species diversity within the genus is likely underestimated by the current taxonomic arrangement. The colonization of lowlands and dry forests, and expansion across South America, may have provided new geographical and ecological opportunities for speciation resulting in high species diversification. Overall diversification dynamics were comparable between montane and lowland clades, contrasting with previous studies focused on such comparisons for Neotropical birds.

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Section: Introductionmentioning

confidence: 99%

Biogeography of a neotropical songbird radiation reveals similar diversification dynamics between montane and lowland clades

Buainain

Ferreira

Avendaño

et al. 2022

Journal of Biogeography

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“…comm.). However, although based on fragmentary pieces of information, the prior occupancy of forests by marsupials, primates, caviomorphs, and sciurids is beyond doubt (Kay et al 1997;Pascual 2006;Abreu-Jr et al 2020). Most likely, Mio-Pliocene sigmodontines repeatedly encountered some kind of forest niche saturation.…”

Section: Discussionmentioning

confidence: 99%

A new species of Mindomys (Rodentia, Cricetidae) with remarks on external traits as indicators of arboreality in sigmodontine rodents

Brito¹,

Koch²,

Tinoco³

et al. 2022

EvolSyst

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The diversity of the oryzomyine rat Mindomys (Cricetidae, Sigmodontinae, Oryzomyini), is doubled here with the description of a new species from the remote Cordillera de Kutukú (Ecuador). The novel form can be easily differentiated from Mindomys hammondi –type species of the genus– by a large set of anatomical traits including, among others, larger jugals, parietal “wings” extending to zygomatic roots, larger otic capsules, well-exposed petrosals, narrow zygomatic plates almost without upper free borders, foramen magnum caudally oriented, larger molars, and accessory root of first upper molar present. Until now, the records of Mindomys were restricted to western Andean foothills. The material from Kutukú highlights an Amazonian species and reinforces the valuable biological significance of isolated mountain ranges in eastern Ecuador. Since Mindomys shows some external traits classically related to arboreal life, here we present a brief reappraisal of this poorly explored topic. A partially neglected anatomical system in sigmodontine studies, the fore feet, encloses crucial information reflecting arboreality.

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“…Exchanges between these two regions are likely to have occurred several times and could be more complicated than currently understood. Although divergence dating estimates could help clarify the timing of South American colonization ( de Abreu-Jr et al, 2020 ), there are few Cryptotis fossils prior to the late Pleistocene. These are exclusively from the US, and their relationship with modern species is unclear (www.paleobiodb.org, last accessed 29 July 2021).…”

Section: Discussionmentioning

confidence: 99%

“…However, as the costs of next-generation sequencing (NGS) continue to decrease, using whole-genome shotgun sequencing to obtain mitochondrial sequences has become more economical ( Gan et al, 2014 ). NGS also makes it possible to obtain complete mitogenomes from museum specimens up to 120 years old ( de Abreu-Jr et al, 2020 ). This is highly recommended for Cryptotis as many species are only represented by old museum specimens ( Woodman, 2019 ).…”

Section: Discussionmentioning

confidence: 99%

Mitogenome and phylogenetic analyses support rapid diversification among species groups of small-eared shrews genus <i>Cryptotis</i> (Mammalia: Eulipotyphla: Soricidae)

Xing

Qiu

et al. 2021

Zoological Research

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The small-eared shrew genus Cryptotis is the third largest in the family Soricidae and occurs in North, Central, and northern South America. In Mexico and Central and South America, most species inhabit geographically isolated moist, montane habitats at middle and high elevations in a typical sky-island pattern. The 49 recognized species have been partitioned into as many as six species groups based on morphological and molecular phylogenetic studies. The relationships among these species groups are poorly resolved, and their evolutionary histories, including migration patterns and locomotor adaptations, remain unclear. Herein, we provide a new phylogeny incorporating complete mitochondrial genomes (mitogenomes) and supermatrix approach. We compared different evolutionary scenarios using approximately unbiased (AU), Kishino-Hasegawa (KH), and Shimodaira-Hasegawa (SH) statistical tests. The phylogenetic hypothesis based on mitogenomes revealed novel relationships supporting a basal position for the Cryptotis parvus -group in the genus, and a close relationship between C. gracilis and one clade of the C. thomasi -group. The former relationship is consistent with the least derived humerus morphology and northern distribution of the species. The latter relationship implies multiple migrations between Central and South America. The lack of fine resolution for the species group relationships may be due partly to the lack of taxon sampling. In contrast, multi-approach analyses suggest that the unresolved relationships may be a result of rapid diversification during the early stages of Cryptotis evolution.

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Spatiotemporal Diversification of Tree Squirrels: Is the South American Invasion and Speciation Really That Recent and Fast?

Cited by 20 publications

References 68 publications

Biogeography of a neotropical songbird radiation reveals similar diversification dynamics between montane and lowland clades

Biogeography of a neotropical songbird radiation reveals similar diversification dynamics between montane and lowland clades

A new species of Mindomys (Rodentia, Cricetidae) with remarks on external traits as indicators of arboreality in sigmodontine rodents

Mitogenome and phylogenetic analyses support rapid diversification among species groups of small-eared shrews genus <i>Cryptotis</i> (Mammalia: Eulipotyphla: Soricidae)

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Spatiotemporal Diversification of Tree Squirrels: Is the South American Invasion and Speciation Really That Recent and Fast?

Cited by 20 publications

References 68 publications

Biogeography of a neotropical songbird radiation reveals similar diversification dynamics between montane and lowland clades

Biogeography of a neotropical songbird radiation reveals similar diversification dynamics between montane and lowland clades

﻿A new species of Mindomys (Rodentia, Cricetidae) with remarks on external traits as indicators of arboreality in sigmodontine rodents

Mitogenome and phylogenetic analyses support rapid diversification among species groups of small-eared shrews genus <i>Cryptotis</i> (Mammalia: Eulipotyphla: Soricidae)

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Product

Resources

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A new species of Mindomys (Rodentia, Cricetidae) with remarks on external traits as indicators of arboreality in sigmodontine rodents