Diverticula in Male Lycorea halia Butterflies (Lepidoptera: Nymphalidae: Danaini: Itunina)-Support Organs for Everted Hairpencils with Unique Ultrastructure.

Perhaps, their primary function is all but a hook―but if so, what other function could this extraordinary organ have? It may be significant that the related genus Anetia has what appears to be comparable paired structures that are much smaller and would not seem capable of providing a similar mechanical function.

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