The Wallacean Shortfall and the role of historical distribution records in the conservation assessment of an elusive Neotropical snake in a threatened landscape

Serrano, Filipe C.; Vieira-Alencar, João Paulo dos Santos; Díaz‐Ricaurte, Juan C.; Valdujo, Paula Hanna; Martins, Márcio Lacerda Lopes; Nogueira, Cristiano de Campos

doi:10.1016/j.jnc.2023.126350

Cited by 2 publications

(2 citation statements)

References 37 publications

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“…Besides Conophiini, there is no species of Xenodontinae that is exclusive to Central America. Further studies might focus on the processes behind this pattern, especially if differences in phylogenetic niche conservatism for habitat or other ecological aspects might have played a role in this extension, as some species have marked habitat‐associated distributions (Serrano et al., 2020, 2023).…”

Section: Discussionmentioning

confidence: 99%

“…Represented are relevant genera for all groups within Dipsadidae: Asian relicts (purple), North American relicts (dark red), Xenodontinae (grey) and Dipsadinae (orange). have played a role in this extension, as some species have marked habitat-associated distributions (Serrano et al, 2020(Serrano et al, , 2023.…”

Section: Cr Isa Nt Op Hi S Ne Ve Rm An Ni C On Op Hi S Lin Ea Tu S M ...mentioning

confidence: 99%

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There and back again: when and how the world's richest snake family (Dipsadidae) dispersed and speciated across the Neotropical region

Serrano,

Pontes‐Nogueira,

Sawaya

et al. 2024

Journal of Biogeography

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AimThe widespread megadiverse Neotropical snake family Dipsadidae occurs in a large range of diverse habitats. Therefore, it represents an excellent model to study the diversification of Neotropical biota. Herein, by generating a time‐calibrated species‐level phylogeny, we investigate the origin and historical biogeography of Dipsadidae and test if its two main Neotropical subfamilies, Xenodontinae and Dipsadinae, have different geographical origins.LocationNeotropical region.TaxonDipsadidae (Serpentes).MethodsWe generated a new Bayesian time‐calibrated phylogeny based on published sequences from six genes for 344 species, including 287 species of Dipsadidae. We subsequently estimated ancestral areas of distribution by comparing models in BioGeoBEARS: DEC (subset sympatry, narrow vicariance), DIVALIKE (narrow and wide vicariance), BAYAREALIKE (no vicariance and widespread sympatry), also testing jump dispersal. We also estimated shifts in the diversification of this group using BAMM, exploring possible relationships with its historical biogeography.ResultsThe best models show that Dipsadidae likely originated approximately 50 million years ago (mya) in Asia. Dispersal was a fundamental process in its historical biogeography. The DEC model with jump dispersal indicated that this family underwent a range extension from Asia and posterior vicariance of North and Central America ancestors. Both Xenodontinae and Dipsadinae originated in Central America and dispersed to South America during Middle Eocene, but did so to different regions (cis and trans‐Andean South America, respectively). Xenodontinae entered cis‐Andean South America around 39 mya and jump dispersed to the West Indies around 33 mya, while Dipsadinae entered trans‐Andean South America multiple times 20–38 mya. The diversification rate decreased through time, except for a clade within Dipsadinae composed of the Dipsadini tribe and the Atractus and Geophis genera.Main ConclusionsOur results show that Dipsadidae has an Asian origin and that the two main Neotropical subfamilies originated in Central America, later dispersing to South America in different time periods. This difference is also reflected in the higher diversification rate for the ‘goo‐eaters’ in the Dipsadinae subfamily. The current biogeographical patterns of the family Dipsadidae, the most species‐rich snake family in the world, have likely been shaped by complex evolutionary and geological processes such as Eocene land bridges, Andean uplift and the formation of the Panama isthmus.

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Section: Discussionmentioning

confidence: 99%

Section: Cr Isa Nt Op Hi S Ne Ve Rm An Ni C On Op Hi S Lin Ea Tu S M ...mentioning

confidence: 99%

There and back again: when and how the world's richest snake family (Dipsadidae) dispersed and speciated across the Neotropical region

Serrano,

Pontes‐Nogueira,

Sawaya

et al. 2024

Journal of Biogeography

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There and back again: when and how the world’s richest snake family (Dipsadidae) dispersed and speciated across the Neotropical region

Serrano

Pontes-Nogueira

Sawaya

et al. 2023

Preprint

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Aim: The widespread megadiverse Neotropical snake family Dipsadidae occurs in a large range of diverse habitats. Thus it is an excellent model to understand the diversification of Neotropical biota. Herein, by generating a time-calibrated species-level phylogeny, we investigate the origin and historical biogeography of Dipsadidae and test if its two main Neotropical subfamilies, Xenodontinae and Dipsadinae, have different geographical origins. Location: Neotropical region. Taxon: Dipsadidae (Serpentes). Methods: We generated a new bayesian time-calibrated phylogeny including sequences from six genes for 344 species, including 287 species of Dipsadidae. We subsequently estimated ancestral areas of distribution by comparing models in BioGeoBEARS: DEC (subset sympatry, narrow vicariance), DIVALIKE (narrow and wide vicariance), BAYAREALIKE (no vicariance and widespread sympatry), also testing jump dispersal. Results: The best models show that Dipsadidae likely originated approximately 50 million years ago (mya) in Asia. Dispersal was a fundamental process in its historical biogeography. The DEC model with jump dispersal indicated that this family underwent a range extension from Asia and posterior vicariance of North and Central America ancestors. Both Xenodontinae and Dipsadinae originated in Central America and dispersed to South America during Middle Eocene, but did so to different regions (cis and trans-Andean South America, respectively). Xenodontinae entered cis-Andean South America around 40 mya and jump dispersed to the West Indies around 35 mya, while Dipsadinae entered trans-Andean South America multiple times 20 - 25 mya. Main conclusions: Our results show that Dipsadidae has an Asian origin and that the two main Neotropical subfamilies originated in Central America, later dispersing to South America in different time periods. The current biogeographical patterns of the family Dipsadidae, the most species-rich snake family in the world, have likely been shaped by complex evolutionary and geological processes such as Eocene land bridges, Andean uplift and the formation of the Panama isthmus.

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The Wallacean Shortfall and the role of historical distribution records in the conservation assessment of an elusive Neotropical snake in a threatened landscape

Cited by 2 publications

References 37 publications

There and back again: when and how the world's richest snake family (Dipsadidae) dispersed and speciated across the Neotropical region

There and back again: when and how the world's richest snake family (Dipsadidae) dispersed and speciated across the Neotropical region

There and back again: when and how the world’s richest snake family (Dipsadidae) dispersed and speciated across the Neotropical region

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