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A Preliminary Study on Relationships among Selected Australian Members of the Tribe Spilomelini (Lepidoptera: Crambidae: Pyraustinae)

Abstract A preliminary study was conducted on phylogenetic relationships among some selected genera of the Australian Spilomelini, focusing on relationships among the Australian Glyphodes group (Glyphodes Guenée, 1854, Dysallacta Lederer, 1863, Talanga Moore, 1885 and Agrioglypta Meyrick, 1932) and the 17 genera which are morphologically similar to it. Representatives of three genera of the Pyarustini were used as outgroups. Cladistic analysis of morphological data from the adult moths produced 10 equally MP trees (length = 221, CI=0.294, and RI=0.608). The clade formed by the 21 selected genera of the Australian Spilomelini had low bootstrap support even though a good apomorphy supported the monophyly of this group, namely, a strong, bilobed praecinctorium of abdominal tympanal organs. The analysis showed that the Glyphodes group is not monophyletic because the genus Chrysothyridia Snellen appears within it in the 10 MP trees. The concept of the Glyphodes group should be expanded to include Chrysothyridia and also the Synclera Zeller and Didymostoma (Walker) since the Synclera + Didymostoma clade, as the hypothesised sister group of the Glyphodes group, is not sufficiently supported as a separate monophyletic group. The analysis also showed that genus Glyphodes is not a monophyletic group, while Metallarcha Meyrick is a monophyletic group.