Santiago Sánchez-Ramírez

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The recognition of taxonomic ranks in the Linnean classification system is largely arbitrary. Some authors have proposed the use of divergence time as a universally standardized criterion. Agaricus (Agaricaceae, Agaricales) is a mushroom genus that contains many species of high commercial value. Recent studies using ITS sequence data discovered 11 new(More)
Posterior TMRCA (million years ago) mean (l) and standard deviation (r2) for species 1. The mean distance (D) and percentage of overlap (p) are for comparison between species 1 and species 2, and vice versa. Instead of: Posterior TMRCA (million years ago) mean (l) and standard deviation (r2) for species 1. The mean distance (D) and percentage of overlap (p)(More)
Marasmius is a widely represented genus in tropical areas, particularly in the Neotropics, which holds exceptional diversity. Previous studies have shown that traditional sections of the genus (e.g. sensu Singer) are still in conflict with phylogenetic data. This paper addresses some issues concerning morphology at the sectional level, section Neosessiles(More)
Arctic and subarctic environments are among the most inaccessible regions in the world, making biological surveys difficult to conduct. Thus, the insect fauna of these regions has remained inadequately surveyed. The aquatic insect orders Ephemeroptera, Plecoptera, and Trichoptera (EPTs) are particularly abundant and diverse at high latitudes, playing key(More)
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