Evolution of novel mosaic castes in ants: modularity, phenotypic plasticity, and colonial buffering.

Abstract excerpt

Many ants have independently evolved castes with novel morphology as well as function, such as soldiers and permanently wingless (ergatoid) queens. We present a conceptual model, based on modularity in morphology and development, in which evolutionary innovation is facilitated by the ancestral ant polyphenism of winged queens and wingless workers. We suggest that novel castes evolved from rare intercastes,...

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