Evolution and dispersal of snakes across the Cretaceous-Paleogene mass extinction

Klein, Catherine G.; Pisani, Davide; Field, Daniel J.; Lakin, Rebecca J.; Wills, Matthew A.; Longrich, Nicholas R.

doi:10.1038/s41467-021-25136-y

Cited by 19 publications

(20 citation statements)

References 86 publications

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“…Sister relationships of Ophiophagus and Naja , and the consecutive nesting in relation to them of Laticauda , Pseudonaja , Notechis , Emydocephalus , and Hydrophis , were first validated using a sufficient set of markers for phylogenetic inference. The position of other families and topology of their clades are in absolute agreement with the earlier data supported by a smaller [ 74 , 76 ] or larger number of loci in the analysis [ 73 , 75 ].…”

Section: Resultssupporting

confidence: 89%

“…In general, reconstructed tree topology for suborder of Serpentes is congruent with the trees obtained recently both with a broad clade sampling based on 40 nuclear and 12 mitochondrial loci and phylogeny for limited number of species estimated from 40,000 genes [ 75 , 76 ]. However, we clarify relationships inside the genus Crotalus , that was not included in phylogenetic analysis with a sufficient number of loci before.…”

Section: Resultssupporting

confidence: 82%

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First Genome of Rock Lizard Darevskia valentini Involved in Formation of Several Parthenogenetic Species

Ochkalova

Korchagin

Vergun

et al. 2022

Genes

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The extant reptiles are one of the most diverse clades among terrestrial vertebrates and one of a few groups with instances of parthenogenesis. Due to the hybrid origin of parthenogenetic species, reference genomes of the parental species as well as of the parthenogenetic progeny are indispensable to explore the genetic foundations of parthenogenetic reproduction. Here, we report on the first genome assembly of rock lizard Darevskia valentini, a paternal species for several parthenogenetic lineages. The novel genome was used in the reconstruction of the comprehensive phylogeny of Squamata inferred independently from 7369 trees of single-copy orthologs and a supermatrix of 378 conserved proteins. We also investigated Hox clusters, the loci that are often regarded as playing an important role in the speciation of animal groups with drastically diverse morphology. We demonstrated that Hox clusters of D. valentini are invaded with transposons and contain the HoxC1 gene that has been considered to be lost in the amniote ancestor. This study provides confirmation for previous works and releases new genomic data that will contribute to future discoveries on the mechanisms of parthenogenesis as well as support comparative studies among reptiles.

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Section: Resultssupporting

confidence: 89%

Section: Resultssupporting

confidence: 82%

First Genome of Rock Lizard Darevskia valentini Involved in Formation of Several Parthenogenetic Species

Ochkalova

Korchagin

Vergun

et al. 2022

Genes

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show abstract

“…Likewise, pit vipers (Viperidae: Crotalinae) were shown to diversify, along with other viviparous viperid lineages, in the wake of the Eocene–Oligocene glaciation, while diversification of oviparous lineages was suppressed (Lynch, 2009). Subsequently, multiple viviparous lineages dispersed into and diversified in tropical regions [e.g., the Neotropical genus Bothrops , the Afrotropical genus Bitis and the Indomalayan genus Tropidolaemus (Alencar et al, 2016; Fenwick et al, 2012; Klein et al, 2021; Lynch, 2009)].…”

Section: Discussionmentioning

confidence: 99%

A global analysis of viviparity in squamates highlights its prevalence in cold climates

Zimin

Shine

et al. 2022

Global Ecol Biogeogr

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Aim: Viviparity has evolved more times in squamates than in any other vertebrate group; therefore, squamates offer an excellent model system in which to study the patterns, drivers and implications of reproductive mode evolution. Based on current species distributions, we examined three selective forces hypothesized to drive the evolution of squamate viviparity (cold climate, variable climate and hypoxic conditions) and tested whether viviparity is associated with larger body size.Location: Global. Time period: Present day.Taxon: Squamata. Methods:We compiled a dataset of 9061 squamate species, including their distributions, elevation, climate, body mass and reproductive modes. We applied species-level and assemblage-level approaches for predicting reproductive mode, both globally and within biogeographical realms. We tested the relationships of temperature, interannual and intra-annual climatic variation, elevation (as a proxy for hypoxic conditions) and body mass with reproductive mode, using path analyses to account for correlations among the environmental predictors.Results: Viviparity was strongly associated with cold climates at both species and assemblage levels, despite the prevalence of viviparity in some warm climates. Viviparity was not clearly correlated with climatic variability or elevation. The probability of being viviparous exhibited a weak positive correlation with body size. Conclusions:Although phylogenetic history is important, potentially explaining the occurrence of viviparous species in regions that are warm at present, current global squamate distribution is characterized by a higher relative abundance of viviparity in cold environments, supporting the prediction of the "cold-climate" hypothesis.The roles of climatic variation and hypoxia are less important and not straightforward. Elevation probably exerts various selective pressures and influences the prevalence of viviparity primarily through its effect on temperature rather than on oxygen concentration.

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“…The answer may be associated with their ecology and habitat preferences. The K-Pg impact was devastating to the world's forests and resulted in significant species turnover [71,77,[474][475][476][477][478]. Palynology of K-Pg boundary sections across the globe indicates that ground cover following the impact consisted primarily of ferns.…”

Section: Inferred Ecology Of the Palaeognath Mrca And K-pg Survivorshipmentioning

confidence: 99%

The Evolution and Fossil Record of Palaeognathous Birds (Neornithes: Palaeognathae)

Widrig

Field

2022

Diversity

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The extant diversity of the avian clade Palaeognathae is composed of the iconic flightless ratites (ostriches, rheas, kiwi, emus, and cassowaries), and the volant tinamous of Central and South America. Palaeognaths were once considered a classic illustration of diversification driven by Gondwanan vicariance, but this paradigm has been rejected in light of molecular phylogenetic and divergence time results from the last two decades that indicate that palaeognaths underwent multiple relatively recent transitions to flightlessness and large body size, reinvigorating research into their evolutionary origins and historical biogeography. This revised perspective on palaeognath macroevolution has highlighted lingering gaps in our understanding of how, when, and where extant palaeognath diversity arose. Towards resolving those questions, we aim to comprehensively review the known fossil record of palaeognath skeletal remains, and to summarize the current state of knowledge of their evolutionary history. Total clade palaeognaths appear to be one of a small handful of crown bird lineages that crossed the Cretaceous-Paleogene (K-Pg) boundary, but gaps in their Paleogene fossil record and a lack of Cretaceous fossils preclude a detailed understanding of their multiple transitions to flightlessness and large body size, and recognizable members of extant subclades generally do not appear until the Neogene. Despite these knowledge gaps, we combine what is known from the fossil record of palaeognaths with plausible divergence time estimates, suggesting a relatively rapid pace of diversification and phenotypic evolution in the early Cenozoic. In line with some recent authors, we surmise that the most recent common ancestor of palaeognaths was likely a relatively small-bodied, ground-feeding bird, features that may have facilitated total-clade palaeognath survivorship through the K-Pg mass extinction, and which may bear on the ecological habits of the ancestral crown bird.

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Evolution and dispersal of snakes across the Cretaceous-Paleogene mass extinction

Cited by 19 publications

References 86 publications

First Genome of Rock Lizard Darevskia valentini Involved in Formation of Several Parthenogenetic Species

First Genome of Rock Lizard Darevskia valentini Involved in Formation of Several Parthenogenetic Species

A global analysis of viviparity in squamates highlights its prevalence in cold climates

The Evolution and Fossil Record of Palaeognathous Birds (Neornithes: Palaeognathae)

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