is a minor or major contributor to speciation is the subject of much ongoing discussion. Rapid sympatric speciation can take place through polyploidy...

Allopatric speciation (from Ancient Greek ἄλλος (állos) 'other', and πατρίς (patrís) 'fatherland') – also referred to as geographic speciation, vicariant...

explains the derivation. Sympatric speciation is one of three traditional geographic modes of speciation. Allopatric speciation is the evolution of species caused...

"stepping-stone" (discrete populations), and stasipatric speciation in concordance with most of the parapatric speciation literature.: 111  Henceforth, the models are...

Peripatric speciation is a mode of speciation in which a new species is formed from an isolated peripheral population.: 105  Since peripatric speciation resembles...

have a good understanding of the origin of new species (speciation) and have observed the speciation process in the laboratory and in the wild. Evolution...

led to the idea that, because selection acts so strongly on mating traits, it may be involved in the process of speciation. This process of speciation influenced...

part of that century. Since then, research on speciation has expanded immensely. The language of speciation has grown more complex. Debate over classification...

of a species due to a change in breeding periods. This isolation acts as a precursor to allochronic speciation, a type of speciation which results when...

Hybrid speciation is a form of speciation where hybridization between two different species leads to a new species, reproductively isolated from the parent...

The Specie Circular is a United States presidential executive order issued by President Andrew Jackson in 1836 pursuant to the Coinage Act of 1834. It...

debate as to whether sympatric speciation actually exists. Artificial speciation is when scientists purposefully cause new species to emerge to use in laboratory...

radiation is finch speciation on the Galapagos ("Darwin's finches"), but examples are known from around the world. Four features can be used to identify an adaptive...

reproduction (as opposed to asexual reproduction) at the level of individuals, and the positive correlation between speciation and extinction rates in...

between closely related populations within a species, sometimes leading to speciation. Divergent evolution is typically exhibited when two populations become...

Speciation has been observed multiple times under both controlled laboratory conditions and in nature. In sexually reproducing organisms, speciation results...

affect speciation and extinction rates, and (b) strict-sense species selection, where species-level traits (e.g. geographical range) affect speciation and...

Gould published their 1972 paper, allopatric speciation was considered the "standard" model of speciation. This model was popularized by Ernst Mayr in...

beyond the intraspecific variation found in microevolution (including speciation). In other words, macroevolution is the evolution of taxa above the species...

Allochronic speciation (also known as allochronic isolation, or temporal isolation) is a form of speciation (specifically ecological speciation) arising...

precursor to speciation. Alternatively, selection can be divided according to its effect on genetic diversity. Purifying or negative selection acts to remove...

can produce rapid changes in the genome. Saltational speciation, also known as abrupt speciation, is the discontinuity in a lineage that occurs through...

speciation is the process by which one lineage splits into two lineages as a result of having evolved independently from each other. For speciation to...

gradualism was sufficient without sudden leaps to cause speciation. Huxley wanted science to be secular, without religious interference, and his article...

increasing homogeneity. For this reason, gene flow has been thought to constrain speciation and prevent range expansion by combining the gene pools of the...

whose geographic distributions overlap (sympatric speciation) or are separate (allopatric speciation). Pre-zygotic isolation mechanisms are the most economic...

operators above, other heuristics may be employed to make the calculation faster or more robust. The speciation heuristic penalizes crossover between candidate...

stage after speciation in which the species were separated for a long time period without evolving morphological differences. Hybrid speciation can be a...

ancestor (LUCA) of all life on Earth. Common descent is an effect of speciation, in which multiple species derive from a single ancestral population....

process of speciation creates groups that are linked by a common ancestor and all its descendants. Species inherit traits, which are then passed on to descendants...