Ambrosio Torres G.

Museum für Naturkunde - Leibniz Institute for Research on Evolution and Biodiversity | MFN · Center for Integrative Biodiversity Discovery

We discuss here the use of TNT (Tree Analysis using New Technology) for phylogenomic analysis. For such data, parsimony is a useful alternative to model-based analyses, which frequently utilize models that make unrealistic assumptions (e.g. low heterotachy), struggle with high levels of missing data, etc. Parsimony and model-based methods often yie...

This paper examines the implementation of parsimony methods in the programs PAUP*, MEGA and MPBoot, and compares them with TNT. PAUP* implements standard, well-tested algorithms, and flexible search strategies and options for handling trees; its main drawback is the lack of advanced search algorithms, which makes it difficult to find most parsimoni...

Assessing the effect of methodological decisions on the resulting hypotheses is critical in phylogenetics. Recent studies have focused on evaluating how model selection, orthology definition and confounding factors affect phylogenomic results. Here, we compare the results of three concatenated phylogenetic methods (Maximum Likelihood, ML; Bayesian...

Visualizador interactivo y en tiempo real, del avance del coronavirus (COVID-19) en Latinoamérica. La aplicación permite a los usuarios escoger desde el diseño gráfico y los colores, hasta las variables y el tipo de gráficos a generar. Algunas de las características de la aplicación interactiva son: - NO necesita descargarse o instalarse en el cel...

The South American and West Indian Casque-headed Treefrogs (Hylidae: Hylinae: Lophyohylini) include 85 species. These are notably diverse in morphology (e.g. disparate levels of cranial hyperossification) and life history (e.g. different reproductive modes, chemical defences), have a wide distribution, and occupy habitats from the tropical rainfore...

One of the lasting controversies in phylogenetic inference is the degree to which specific evolutionary models should influence the choice of methods. Model-based approaches to phylogenetic inference (likelihood, Bayesian) are defended on the premise that without explicit statistical models there is no science, and parsimony is defended on the grou...

The inference of phylogenetic hypotheses from landmark data has been questioned during the last two decades. Besides theoretical concerns, one of the limitations pointed out for the use of landmark data in phylogenetics is its (supposed) lack of information relevant to the inference of phylogenetic relationships. However, empirical analyses are sca...

We evaluated the directional asymmetry between right and left wings, and quantified the intraspecific and interspecific variation of the wing shape of 601 specimens of the genus Diachlorus to determine to what extent the geometrical variation discriminates six species distributed in six protected areas of Colombia. Geometric analyses were performed...