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. 2020 Jan 20;74(2):349–364. doi: 10.1111/evo.13922

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© 2020 The Authors. Evolution published by Wiley Periodicals, Inc. on behalf of The Society for the Study of Evolution

This is an open access article under the terms of the http://creativecommons.org/licenses/by/4.0/ License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.

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Androconial chemistry of Heliconius melpomene and Heliconius cydno. (A) Dorsal forewing and hindwing of each species showing the silvery androconial region of the hindwing used during male courtship. (B) Total ion chromatogram of H. melpomene (top) and H. cydno (bottom) wing androconia. P1, syringaldehyde; P2, octadecanal; P3, 1‐octadecanol; P4, henicosane; P5, (Z)‐11‐icosenal; P6, (Z)‐11‐icosenol; P7, (Z)‐13‐docosenal; IS, internal standard (2‐tetradecyl acetate); x, contaminant; C21, henicosane; C22, docosane; C23, tricosane.