Journal article

Phylogeny, classification and biogeography of Halfordia (Rutaceae) in Australia and New Caledonia

Michael J Bayly, Gareth D Holmes, Paul I Forster, Jerome Munzinger, David J Cantrill, Pauline Y Ladiges



Halfordia F.Muell is a genus of rainforest trees or shrubs native to New Guinea, New Britain, New Caledonia, Vanuatu and eastern Australia. There is debate about the number of species that should be recognised in the genus. Four species have been named, but authors have commonly recognised only two species, and some recent treatments accept just one widespread species with a broad ecological range. We sequenced two nrDNA markers (ITS and ETS) and two cpDNA markers (rbcL and trnL–trnF) from samples across the range of Halfordia in Australia and New Caledonia. Three allopatric nrDNA groups were resolved: one from southeast Queensland and northern New South Wales (Group A); one from the Wet T..

View full abstract


Awarded by Australian Research Council

Awarded by Australian Biological Resources Study

Funding Acknowledgements

This study was funded by the Australian Research Council (LP0776737) and the Australian Biological Resources Study (PD208-02). Collecting permits were provided by the New South Wales Parks and Wildlife Service, the former Queensland Environmental Protection Agency, and conservation authorities of the North and South Provinces of New Caledonia (DDEE, Direction du Developpement Economique et de l'Environnement; DENV, Direction de l'Environnement). We thank Garry Sankowsky, Andrew Ford, Kris Kupsch, David Fell, Greg Smyrell, Bruce Wannan, Mike Mathieson, Gareth Nelson, Gillian Brown, and Carlos Parra-O. for assistance with fieldwork or provision of samples.