Tasmanitachoides belongs to Trechini (Coleoptera : Carabidae): discovery of the larva, its phylogenetic implications and revised key to Trechitae genera
Vasily V. GrebennikovA Entomology Research Laboratory, Canadian Food Inspection Agency, Canadian National Collection of Insects, K.W. Neatby Building, 960 Carling Avenue, Ottawa, Ontario, K1A 0C6, Canada.
B Entomology Group, Institut für Spezielle Zoologie und Evolutionsbiologie mit Phyletischem Museum, Friedrich-Schiller-Universität Jena, Erbertstraße 1, 07743 Jena, Germany.
C Email: grebennikovv@inspection.gc.ca
Invertebrate Systematics 22(4) 479-488 https://doi.org/10.1071/IS07051
Submitted: 3 October 2007 Accepted: 18 August 2008 Published: 14 October 2008
Abstract
This study is aimed at solving the long-standing ambiguity about the phylogenetic placement of the Australian ground-beetle genus Tasmanitachoides. A recently published phylogeny of the supertribe Trechitae using morphological characters of larvae is re-examined in light of new discoveries. The results of the phylogenetic analysis of 65 informative characters for 36 taxa reject the previously maintained opinion of affinities between Tasmanitachoides and Tachyini. Instead it is hypothesised that the genus is a member of the monophyletic tribe Trechini and most likely belongs to the Trechodina radiation, represented in the analysis by the genera Perileptus and Thalassophilus. Older-instar larvae of Tasmanitachoides, Kenodactylus and Mioptachys, as well as the first-instar larva of Pachydesus, are described. An updated identification key to all analysed Trechitae genera is provided.
Additional keywords: Australia, immature stages, Kenodactylus, Mioptachys, Pachydesus, Trechodina.
Acknowledgements
I thank Geoff Monteith (Queensland Museum) and Nike Porch (Monash University) for organising our fieldwork in Australia when searching for Tasmanitachoides. Geoff wisely focused his efforts on washing beach sand on the banks of Burnett River, which resulted in the single collected Tasmanitachoides larva. Elisabeth Hintelmann (Munich, Germany) partly funded this project through a scientific foundation she had established at the Zoologische Staatssammlung München (http://www.zsm.mwn.de/events/wiss_preise.htm) in memory of her late husband R.J.H. Hintelmann. This project was also partly supported by the Alexander von Humboldt Stiftung through a Visiting Fellowship in 2003–04. Rowan Emberson (Christchurch, New Zealand) kindly sent Kenodactylus larvae used in this study. Yves Bousquet (Agriculture and Agri-Food Canada, Ottawa) and David R. Maddison (University of Arizona, Tucson) read the manuscript before its submission.
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