The Mexican transition zone (MTZ) is the complex area where the Neotropical and Nearctic
biotas overlap, including south-western United States, Mexico and a large part of Central …

Endemic species represent an important component of biodiversity. They are functionally
and evolutionarily distinct from cosmopolitan species, and are under greater threat of …

Both gene-tree discordance and unrecognized diversity are sources of error for accurate
estimation of species trees, and can affect downstream diversification analyses by obscuring …

Genetic structure can be influenced by local adaptation to environmental heterogeneity and
biogeographic barriers, resulting in discrete population clusters. Geographic distance …

Results from genetic and geologic studies can be combined to elucidate some general
patterns of the biogeographic and evolutionary history of Central America (CA) and of its …

Garter snakes (Thamnophis) are a successful group of natricines endemic to North America.
They have become important natural models for ecological and evolutionary research, yet …

Abstract Background and Aims Biogeographic transition zones are promising areas to study
processes of biogeographic evolution and its influence on biological groups. The Mexican …

The M exican transition zone is the complex and varied area in which the N eotropical and N
earctic biotas overlap. In a series of contributions, G onzalo H alffter provided a coherent …

The importance of islands in revealing evolutionary processes was highlighted already at
the birth of evolutionary biology as a science (Darwin 1859; Darwin and Wallace 1858) …

Aim Our aims were to determine the pattern of genetic variation in the endemic shrub N olina
parviflora, and to evaluate the influence of the geological history of the T rans‐M exican V …