The genus Pygoscelis ("elbow-legged") contains three living species of penguins collectively known as "The Brush-Tailed Penguins". Their appearance - black above, white below -'s the stereotypical image penguins, and so what most people think of when they think of penguins. Taxonomy Mitochondrial and nuclear DNA evidence suggests the genus split from other penguins around 38 million years ago, about 2 million years after the ancestors of the genus Aptenodytes. In turn, the Adelie Penguins split… (More on Pygoscelis)