Evolution, Volume 0, Issue 0, Page ???, OnlineEarly Articles.
A common pattern in time-calibrated molecular phylogenies is a signal of rapid diversification early in the history of a radiation. Because the net rate of diversification is the difference between speciation and extinction rates, such "explosive-early" ...

Evolution, Volume 0, Issue 0, Page ???, OnlineEarly Articles.

Evolution, Volume 0, Issue 0, Page ???, OnlineEarly Articles.
Coevolutionary interactions are thought to play a crucial role in diversification of hosts and parasitoids. Furthermore, resource availability has been shown to be a fundamental driver of species diversity. Yet, we still do not have a clear understanding ...

Evolution, Volume 0, Issue 0, Page ???, OnlineEarly Articles.
Cope's Rule states that the size of species tends to increase along an evolutionary lineage. A basic statistical framework is elucidated for testing Cope's Rule and some surprising complications are pointed out. If Cope's Rule is formulated in terms of ...

Evolution, Volume 0, Issue 0, Page ???, OnlineEarly Articles.
Most phylogenetic comparative methods used for testing adaptive hypotheses make evolutionary assumptions that are not compatible with evolution toward an optimal state. As a consequence they do not correct for maladaptation. The "evolutionary regression" ...

Evolution, Volume 0, Issue 0, Page ???, OnlineEarly Articles.
Despite hundreds of reports involving both plants and animals, the mechanisms underlying introgression remain obscure, even if some form of selection is frequently invoked. Introgression has repeatedly been reported in species that have recently ...

Evolution, Volume 0, Issue 0, Page ???, OnlineEarly Articles.
Leaf shape is one of the most variable plant traits. Previous work has provided much indirect evidence that leaf-shape variation is adaptive and that leaf shape influences thermoregulation, water balance, and resistance to natural enemies. Nevertheless, ...

Evolution, Volume 0, Issue 0, Page ???, OnlineEarly Articles.
Hybridization between distinct species may lead to introgression of genes across species boundaries, and this pattern can potentially persist for extended periods as long as selection at some loci or genomic regions prevents thorough mixing of gene ...

Evolution, Volume 0, Issue 0, Page ???, OnlineEarly Articles.
Several techniques, such as concatenation and consensus methods, are available for combining data from multiple loci to produce a single statement of phylogenetic relationships. However, when multiple alleles are sampled from individual species, it ...

Evolution, Volume 0, Issue 0, Page ???, OnlineEarly Articles.

Evolution, Volume 0, Issue 0, Page ???, OnlineEarly Articles.
Sterility barriers, ranging from incomplete to fully developed, were recently demonstrated within taxonomic species of the genus Draba, suggesting the existence of numerous, cryptic biological species. Because these taxa are predominately selfers and of ...

Evolution, Volume 0, Issue 0, Page ???, OnlineEarly Articles.
Cophyline narrow-mouthed frogs (Anura: Microhylidae) are a diverse endemic radiation of Madagascar. Cophylines contain a high proportion of range restricted species and constitute a good model system to understand patterns of evolutionary diversification ...

Evolution, Volume 0, Issue 0, Page ???, OnlineEarly Articles.
Mate-choice imprinting, the determination of mating preferences at an early age based on an individual's observation of adults, plays a role in mate choice in a wide variety of animals. Theoretical work has thus far been focused either on the effects of ...

Evolution, Volume 0, Issue 0, Page ???, OnlineEarly Articles.
The study of chalcid wasps that live within syconia of fig trees (Moraceae, Ficus), provides a unique opportunity to investigate the evolution of specialized communities of insects. By conducting cospeciation analyses between figs of section Galoglychia ...

Evolution, Volume 0, Issue 0, Page ???, OnlineEarly Articles.
Measurements of natural selection in hermaphrodite populations require the analysis of performance through both female and male sex functions. Here, we investigate selection on three floral traits: flower number, flower length, and corona width through ...

Evolution, Volume 0, Issue 0, Page ???, OnlineEarly Articles.
Coevolution between parasites and their hosts typically leads to increasing specialization on host species by the parasite. Where multiple hosts are parasitized, specialization on each host can result in genetic divergence within the parasite population ...

Evolution, Volume 0, Issue 0, Page ???, OnlineEarly Articles.
Analyses of molecular phylogenies of three unrelated tropical marine gastropod genera, Turbo, Echinolittorina, and Conus, reveal an increase in the rate of cladogenesis of some Indo-West Pacific (IWP) clades beginning in the Late Oligocene or Early ...

Evolution, Volume 0, Issue 0, Page ???, OnlineEarly Articles.
"…the highly developed, or specialized types of one geologic period have not been the parents of the types of succeeding periods, but …the descent has been derived from the less specialized of preceding ages…" — Edward D. Cope (1896), pp. 173–174 ...

Evolution, Volume 0, Issue 0, Page ???, OnlineEarly Articles.
The burst-death model has been developed to describe the life history of organisms with variable generation times and a burst of a fixed number of offspring. The model also includes an optional constant clearance rate, such as washout from a chemostat, ...

Evolution, Volume 0, Issue 0, Page ???, OnlineEarly Articles.
Organisms often adapt to new conditions by means of beneficial mutations that become fixed in the population. Often, full adaptation requires several different mutations in the same cell, each of which may affect a different aspect of the behavior. Can ...