It is thought to have evolved outside the usual model of allopatric speciation, from its parental species " Stephanomeria exigua ".
22.
Allopatric speciation suggests that species with large central populations are stabilized by their large volume and the process of gene flow.
23.
On the other hand, interspecific hybridization barriers can also arise as a result of the adaptive divergence that accompanies allopatric speciation.
24.
There were even some island-dwelling dwarf species such as " Magyarosaurus ", probably the result of allopatric speciation and insular dwarfism.
25.
During the Pleistocene era at the height of the Atrato river, where it intersected the diverge through the process of allopatric speciation.
26.
This change caused allopatric speciation to occur among many species and gave rise to a new subspecies-" P . p . melanonota ".
27.
This includes the case where two species make secondary contact in an area of sympatry and form hybrids after allopatric speciation has occurred.
28.
The Congo's formation may have led to the allopatric speciation of the bonobo and the common chimpanzee from their most recent common ancestor.
29.
This separates populations of some of the species in areas with different climates, forcing them to adapt, possibly giving rise to allopatric speciation.
30.
If most evolution happens in these rare instances of allopatric speciation then evidence of gradual evolution in the fossil record should be rare.
