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Article << Previous     |     Next >>   Contents Vol 26(1)

Systematic revision and phylogeny of the Australian myrmecomorphic seed bug genus Daerlac Signoret (Insecta : Heteroptera : Rhyparochromidae : Udeocorini)

Gerasimos Cassis A B and Celia Symonds A

A Evolution and Ecology Research Centre, University of New South Wales, Sydney, NSW 2052, Australia.
B Corresponding author. Email: gcassis@unsw.edu.au

Invertebrate Systematics 26(1) 41-66 http://dx.doi.org/10.1071/IS11030
Submitted: 2 August 2011  Accepted: 16 January 2012   Published: 19 June 2012


 
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Abstract

The Australian endemic ant-mimetic seed bug genus Daerlac is revised. This paper provides a redescription of the genus Daerlac and four species: D. apicalis, D. cephalotes, D. nigricans and D. picturatus. Daerlac tricolor is synonomised with D. cephalotes. A taxonomic key to species is provided. Known distributions of D. apicalis, D. nigricans and D. picturatus are each extended beyond previously known ranges. Daerlac species are found predominantly in temperate open forest and woodlands in association with ants and eucalypts. All species are broadly distributed and there is a high degree of overlap in distributions. They are seed predators found on the ground, in leaf litter, under bark or on trunks of eucalypts, and putatively forage on post-dispersed seeds. Cladistic analysis of morphological characters finds that the four species of Daerlac form two well-supported sister-groups (D. apicalis + D. picturatus, and D. cephalotes + D. nigricans). A discussion of the distribution, biology and myrmecomorphy of the genus is provided, and the tribal placement of Daerlac and its relationship to Laryngodus are discussed.

Additional keywords: synonomy, distribution, ant mimicry, Australia.


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