Abstract
Two species of the brown algal genus Rosenvingea are reported from south-west (SW) Australia, including the widely distributed R. orientalis and the new species R. australis Huisman, G.H. Boo et S.M. Boo, sp. nov. Molecular phylogenies of mitochondrial cox3 and plastid psaA unequivocally align the SW Australian R. orientalis with specimens from Vietnam and the species is morphologically consistent throughout its Australian range. Australian specimens of the new species R. australis join with a specimen from New Caledonia and these resolve as a sister species to R. intricata, with levels of pairwise divergence (4.2–4.9% in cox3 and 3.9–4.0% in psaA) comparable to those between other scytosiphonacean species. The new species can be distinguished morphologically by its branch dimensions and the arrangement and size of plurangia, but further studies including molecular analyses of a full range of species and possible morphological variants are needed.
About the authors
John M. Huisman is Herbarium Curator at the Western Australian Herbarium. He earned his PhD at the University of Melbourne, where he developed his interests in the taxonomy of marine macroalgae. After moving to Perth he embarked on a lifelong project to document (by description and photographically) the seaweeds of Australia’s west coast. Author of several books, including Marine Plants of Australia, Hawaiian Reef Plants, and two volumes in the Algae of Australia series describing the marine flora of tropical Western Australia.
Ga Hun Boo is a postdoctoral researcher at the University Herbarium, University of California, Berkeley, CA, USA. He was awarded a PhD by Chungnam National University for his research into the diversity and evolution of the order Gelidiales (Rhodophyta). His main research interest is the taxonomy, phylogeography and phylogenomics of red algae.
Sung Min Boo is an emeritus professor at the Department of Biological Sciences, Chungnam National University. He was awarded a PhD by Seoul National University for his research into the taxonomy of the family Ceramiaceae (Rhodophyta). His research includes the diversity and distribution of brown and red algae.
Acknowledgements
JMH thanks the “Australian Biological Resources Study” for support and SMB acknowledges a grant from the Marine Biotechnology Program (20170431) of the Korean Ministry of Ocean and Fisheries. We thank the anonymous reviewers for insightful comments.
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Supplementary Material
The online version of this article offers supplementary material (https://doi.org/10.1515/bot-2017-0105).
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