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A phylogeny and revised classification of Squamata, including 4161 species of lizards and snakes
A new large-scale phylogeny of squamate reptiles is presented that includes new, resurrected, and modified subfamilies within gymnophthalmid and scincid lizards, and boid, colubrid, and lamprophiid snakes.
A large-scale phylogeny of Amphibia including over 2800 species, and a revised classification of extant frogs, salamanders, and caecilians.
Biogeographic analysis reveals ancient continental vicariance and recent oceanic dispersal in amphibians.
- R. A. Pyron
- Environmental Science, GeographySystematic biology
- 1 September 2014
It is found that Pangaean origin and subsequent Laurasian and Gondwanan fragmentation explain a large proportion of patterns in the distribution of extant species, and dispersal during the Cenozoic has also exerted a strong influence.
Divergence time estimation using fossils as terminal taxa and the origins of Lissamphibia.
- R. A. Pyron
- Environmental Science, BiologySystematic biology
- 1 July 2011
Potential pitfalls for the use of fossils as post hoc age constraints on internal nodes are illustrated and the importance of explicit phylogenetic analysis of extinct taxa are highlighted.
The interplay of past diversification and evolutionary isolation with present imperilment across the amphibian tree of life
A phylogeny of nearly all extant amphibian species reveals biogeographic patterns of evolutionary distinctiveness and current threat exposure that will inform conservation strategies for these groups, suggesting opportunities for integrating evolutionary position and phylogenetic heritage in addressing the current extinction crisis.
The phylogeny of advanced snakes (Colubroidea), with discovery of a new subfamily and comparison of support methods for likelihood trees.
Early origin of viviparity and multiple reversions to oviparity in squamate reptiles.
This work reconstructs ancestral parity modes accounting for state-dependent diversification in a large-scale phylogenetic analysis and finds strong support for an early origin of viviparity at the base of Squamata, and a complex pattern of subsequent transitions.
Fully-sampled phylogenies of squamates reveal evolutionary patterns in threat status
PHYLOGENETIC ANALYSES REVEAL UNEXPECTED PATTERNS IN THE EVOLUTION OF REPRODUCTIVE MODES IN FROGS
- I. Gomez‐Mestre, R. A. Pyron, J. Wiens
- Biology, Environmental ScienceEvolution; international journal of organic…
- 1 December 2012
This work analyzes the evolution of anuran reproductive modes using comparative methods on a phylogeny and matched life‐history database of 720 species, finding significant associations between terrestrial reproduction and reduced clutch size, larger egg size, reduced adult size, parental care, and occurrence in wetter and warmer regions.
A likelihood method for assessing molecular divergence time estimates and the placement of fossil calibrations.
- R. A. Pyron
- BiologySystematic biology
- 1 March 2010
A method for the objective assessment of the likelihood of inferred divergence times to evaluate the placement of fossil constraints using information from the broader fossil record and the use of "likelihood checkpoints" will allow for the comparison of inferred dates across data sets and across taxonomic groups to place divergence time estimates into a broader evolutionary timescale.