Haplotype phylogenies based on DNA sequence data are increasingly being used to test
traditional species-level taxonomies based on morphology. However, few studies have …

Nature's imperiled state during the present biodiversity crisis has caused many to question
the justification for continued scientific collecting. Public opposition to and criticism of …

This is the first cladistic analysis of sigmodontine rodents (Cricetidae, Sigmodontinae) based
on nuclear and mitochondrial DNA sequences. Two most parsimonious cladograms (7410 …

The study of evolution has increasingly incorporated considerations of history, scale, and
hierarchy, in terms of both the origin of variation and the sorting of that variation. Although …

Background Mitochondrial and nuclear genes have generally been employed for different
purposes in molecular systematics, the former to resolve relationships within recently …

Applications of quantitative techniques to understanding macroevolutionary patterns
typically assume that genetic variances and covariances remain constant. That assumption …

We analysed the phylogenetic relationships of ten of the 13 known species of the genus
Apomys using DNA sequences from cytochrome b. Apomys, endemic to oceanic portions of …

El conocimiento existente sobre los roedores y marsupiales del norte de Patagonia
argentina extra andina es escaso tanto en aspectos taxonómicos, distribucionales como en …

Each year new mammalian taxa are described from the Neotropics but, contrary to
conventional wisdom, these are not solely rats and bats. Since the publication of the last …

The low oxygen levels at high altitude are a potent and unavoidable physiological stressor
to which highland mammals must adapt. One hypothesized adaptation to high altitude is an …