Focus on butterfly eyespot development

Article Abstract:

The reciprocal interactions between developement and evolution have given rise to the evolution of eyespots on the wings of butterflies. The first stage of eyespot development is the expression of the regulatory gene, Distal-less (Dll). In the second stage, Dll expression is restricted to a single spot that will be the focus of the eyespot. The third stage is the activation of the focal signal that induces the eyespot. The gene, Bigeye, regulates the size of the eyespot.

Developmental biology

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Butterflies at that awkward age

Article Abstract:

The debate of butterfly history can be understood through the study of the twenty million year old butterfly specimens caught in the Caribbean. The results of the study of this fossils suggest that the Voltinia could be the first adult butterfly found in amber.

Science & research, Caribbean Region, History, Animals, Fossil, Fossil animals, Caribbean Islands

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Preventing cyanide release from leaves

Article Abstract:

Research is presented concerning the ability of the butterfly Heliconius sara to produce hydrogen cyanide gas to protect itself from predation. The butterfly's caterpillars feed on cyanogenic leaves and are able to metabolize the cyanogens.

Cyanides, Caterpillars

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