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Holey Aroids: Circular Trenching Behavior by a Leaf Beetle in Vietnam

D. Christopher Darling
Biotropica
Vol. 39, No. 4 (Jul., 2007), pp. 555-558
Stable URL: http://www.jstor.org/stable/30043284
Page Count: 4
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Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
Holey Aroids: Circular Trenching Behavior by a Leaf Beetle in Vietnam
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Abstract

The leaf beetle Aplosonyx ancora cuts circular trenches on the underside of leaves of their aroid host plants before feeding. Latex is exuded from these cuts and the beetles feed intermittently on these isolated tissues, apparently avoiding the latex. Circular feeding holes occur only in Araceae in which latex is contained in cells or vessels with cells bridging adjacent files ("anastomosing laticifers"). The phylogeny of Araceae and the restricted host records suggest a coevolutionary arms race and parallel phylogenesis between Aplosonyx and its aroid hosts.

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