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Rate heterogeneity across Squamata, misleading ancestral state reconstruction and the importance of proper null model specification
TLDR
It is found that there is no single, consistent signal for state‐dependent diversification associated with toepads in gekkotans or viviparity across all squamates, highlighting the importance of considering an adequate pool of models and null models when estimating diversification rate parameters and reconstructing ancestral states. Expand
Variation in timing of ossification affects inferred heterochrony of cranial bones in Lissamphibia
TLDR
Results indicate a high degree of variation in timing of ossification, and suggest a cautionary note about use of these data, particularly given that in most instances issues associated with the original sources of data are not addressed. Expand
Pleistocene climatic fluctuations drive isolation and secondary contact in the red diamond rattlesnake (Crotalus ruber) in Baja California
TLDR
It is suggested that climatic fluctuations have driven the observed phylogeographic structure observed in C. ruber and that they may have driven similar patterns in other taxa. Expand
Ossification sequence heterochrony among amphibians
TLDR
A new version of the program Parsimov‐based genetic inference was used to identify shifts in ossification sequences across all extant orders of amphibians, for all major structural units of the skeleton, and a number of heterochronic sequence shifts seem to be tied to differences in metamorphic patterns among major clades. Expand
Squamate Phylogenetics, Molecular Branch Lengths, and Molecular Apomorphies: A Response to McMahan et al.
TLDR
It is demonstrated that counting the molecular apomorphies along a given branch is a poor measure of support for a clade and that the molecular data do not provide support for the morphology-based squamate phylogeny as the optimal topology. Expand
Mitochondrial recovery from shotgun metagenome sequencing enabling phylogenetic analysis of the common thresher shark (Alopias vulpinus)
TLDR
The availability of the common thresher shark mitogenome will aid phylogenetic inference and population based studies of this important fisheries species. Expand
Habits and characteristics of arboreal snakes worldwide: arboreality constrains body size but does not affect lineage diversification
TLDR
It is found that generally, arboreal snakes are most frequently nocturnal, oviparous, reptile-eating, brown/banded/patterned snakes inhabiting the Neotropics and that arboreality has no effect on rates of diversification. Expand
Macroevolution and Diversification of Snakes at Multiple Taxonomic Levels
TLDR
This dissertation explores macroevolutionary trait evolution and diversification of snakes at multiple taxonomic levels and provides insight into how traits have evolved across the major clades of snakes, as well as lower-level processes that influence the divergence of local lineages that may or may not eventually become species and contribute to the global snake diversity. Expand
Properties of Markov Chain Monte Carlo Performance across Many Empirical Alignments
TLDR
An overview of commonly applied phylogenetic MCMC diagnostics is presented and an assessment of patterns of these diagnostics across more than 18,000 empirical analyses show that the usage of models that include both Γ-distributed among-site rate variation and a proportion of invariable sites is not broadly problematic for MCMC convergence but is also unnecessary. Expand