It is likely that allopatric
divergence occurred as a result of the ocean barrier between Borneo and mainland Southeast Asia, established at the end of the last ice age [approximately equal to] 13,000 years ago, which prevents the movement of wild macaque reservoir hosts (31).
In this study, we put forward the hypothesis that the four species within the Ceratozamia norstogii complex, despite the low genetic variability between them, probably have originated from a genetically depauperate ancestor through an allopatric
speciation process, resulting from recent divergence due to genetic drift via founder effects.
The ranges of the Hungaricus, Syrmiensis and Montanosyrmiensis races are geographically close but probably allopatric
(Soldatovic et al.
However, also for allopatric
species similar song patterns are to be expected (Heller 2006).
A comparative structural cytogenetic study in three allopatric
populations of Astyanax scabripinnis (Teleostei: Characidae).
Moving to a broader perspective, the analysis of the allopatric
speciation processes may lead to the understanding of biogeographical patterns of distribution in the ferns.
atra + the Northern Clade and the Southern Clade 2 are completely allopatric
F-statistics reveal significant differentiation compared to allopatric
Midas cichlid fishes (Fst: [greater than or equal to] 0.
However, studies in other broadcast-spawning marine invertebrates have failed to find any difference in the rate of divergence of GRPs between sympatric and allopatric
populations, despite evidence for strong positive selection acting on these reproductive proteins (Nydam and Harrison, 2011).
male Calopteryx virgo damselflies learn species recognition?
speciation, individuals of a species become geographically isolated from each other by external factors such as mountains or estuaries.
Furthermore, it is noteworthy to mention here that Coluber bholanathi and Coluber gracilis (Gunther, 1862), an allopatric
congener, both share some scalation and coloration characters in common, except dorsal scale row count --19:19:12-15 (fide Gupta et al.