Occurrence and inheritance of a colour pattern dimorphism in adults of Hyalophora euryalus (Lepidoptera: Saturniidae)
Abstract
A white prothoracic collar and white abdominal rings are among the characters used to distinguish adults in the genus Hyalophora Duncan (Lepidoptera: Saturniidae) from those in the related genera Callosamia Packard and Eupackardia Cockerell. However, some adults of H. euryallis (Boisduval) on southern Vancouver Island, British Columbia, were found to lack these white body markings. Controlled rearing indicated that the "brown" phenotype is produced by a recessive allele at a single autosomal locus, and examination of museum specimens showed that it is fairly common on southern Vancouver Island and has been present there for at least half a century.
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