The “sexy shrimp”
Coral reefs in all tropical oceans.
Specimens of
We found evidence for at least five cryptic lineages (9%–22%
Among the main biogeographical hypotheses explaining the remarkable diversity of fishes in the Neotropics is the “palaeogeographical hypothesis”, focusing on vicariance, and the “hydrogeological hypothesis”, focusing on geodispersal. Yet while reflecting different processes, they may result in similar biogeographical patterns. We employed a model‐based Bayesian approach to test these alternative hypotheses and determine which shaped the phylogeographical patterns observed in a group of Neotropical fishes.
South America.
We used mitochondrial and nuclear markers to infer phylogenetic relationships and estimate divergence times among
The analyses suggest that the diversification process in
Both vicariance and geodispersal signatures were detected in our biological model, inferring a complex yet realistic demographic history of
The “sexy shrimp”
Coral reefs in all tropical oceans.
Specimens of
We found evidence for at least five cryptic lineages (9%–22%
The Lesser Sunda Islands are situated between the Sunda and Sahul Shelves, with a linear arrangement that has functioned as a two‐way filter for taxa dispersing between the Asian and Australo‐Papuan biogeographical realms. Distributional patterns of many terrestrial vertebrates suggest a stepping‐stone model of island colonization. Here we investigate the timing and sequence of island colonization in Asian‐origin fanged frogs from the volcanic Sunda Arc islands with the goal of testing the stepping‐stone model of island colonization.
The Indonesian islands of Java, Lombok, Sumbawa, Flores and Lembata.
Mitochondrial
The mt
These results suggest that the currently accepted stepping‐stone model of island colonization might not best explain the current patterns of diversity in the archipelago. The high degree of genetic structure, large divergence times, and absent or low levels of migration between lineages suggests that
To test the importance of alternative diversification drivers and biogeographical processes for the evolution of Amazonian upland forest birds through a densely sampled analysis of diversification of the endemic Amazonian genus
Amazonia.
Antbirds (Thamnophilidae).
We sequenced four mt
Dense sampling throughout the distribution of
Based on broad‐scale sampling, a clarification of taxonomic boundaries, and strongly supported phylogenetic relationships, we confirm that, first, mitochondrial lineages within this upland forest Amazonian bird genus agree with spatial patterns known for decades based on phenotypes, and second, that most lineages are geographically delimited by the large Amazonian rivers. The association between past demographic changes related to palaeoclimatic cycles and the historically varying strength and size of rivers as barriers to dispersal may be the path to the answer to the long‐standing question of identifying the main drivers of Amazonian diversification.
We used genome‐scale sampling to assess the phylogeography of a group of topminnows in the
Central and southern United States including drainages of the Gulf of Mexico Coastal Plain and portions of the Mississippi River drainage in and around the Central Highlands.
Topminnows, Genus
We sampled members of the
Genetic data are presented for 749 individuals sampled from 14
Populations of