Divergent patterns of diversification in courtship and genitalic characters of Timema walking-sticks

D. Arbuthnott*, M.G. Elliot, M.A. McPeek, B.J. Crespi

*Bijbehorende auteur voor dit werk

OnderzoeksoutputAcademicpeer review

18 Citaten (Scopus)


Understanding the patterns of diversification in sexual traits and the selection underlying such diversification represents a major unresolved question in evolutionary biology. We examined the phylogenetic diversification for courtship and external genitalic characters across ten species of Timema walking-sticks, to infer the tempos and modes of character change in these sexual traits and to draw inferences regarding the selective pressures underlying speciation and diversification in this clade. Rates of inferred change in male courtship behaviours were proportional to speciation events, but male external genitalic structures showed a pattern of continuous change across evolutionary time, with divergence proportional to branch lengths. These findings suggest that diversification of courtship behaviour is mediated by processes that occur in association with speciation, whereas diversification of genitalia occurs more or less continuously, most likely driven by forces of sexual selection.

Originele taal-2English
Pagina's (van-tot)1399-1411
Aantal pagina's13
TijdschriftJournal of Evolutionary Biology
Nummer van het tijdschrift7
StatusPublished - jul-2010
Extern gepubliceerdJa

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