Geographic isolation can lead to significant genetic divergence between populations, as demonstrated by the discovery of Ingerana occidens, a new frog species in the Garo and Khasi Hills of Meghalaya, India, whose DNA differs by 18% from northern relatives despite living in close proximity, illustrating how physical barriers like rivers can drive speciation.
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Ingerana occidens
Added:They found a new frog species, and its DNA is 18% different from its closest relative. That's a massive genetic gap for frogs that live just south of the Brahmaputra River in India. The northern frogs and these new southern ones in the Garo and Khasi Hills were basically split by geography. They named it Ingerana occidentalis, which means west in Latin, because this is the westernmost spot any frog in this genus has ever been documented.
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