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Molecular phylogeny and taxonomic revision of the genus Wittrockiella (Pithophoraceae, Cladophorales), including the descriptions of W. australis sp. nov. and W. zosterae sp. nov

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posted on 23.08.2020 by C Boedeker, CJ O'Kelly, JA West, T Hanyuda, A Neale, I Wakana, MD Wilcox, U Karsten, Giuseppe Zuccarello
© 2017 Phycological Society of America Wittrockiella is a small genus of filamentous green algae that occurs in habitats with reduced or fluctuating salinities. Many aspects of the basic biology of these algae are still unknown and the phylogenetic relationships within the genus have not been fully explored. We provide a phylogeny based on three ribosomal markers (ITS, LSU, and SSU rDNA) of the genus, including broad intraspecific sampling for W. lyallii and W. salina, recommendations for the use of existing names are made, and highlight aspects of their physiology and life cycle. Molecular data indicate that there are five species of Wittrockiella. Two new species, W. australis and W. zosterae, are described, both are endophytes. Although W. lyallii and W. salina can be identified morphologically, there are no diagnostic morphological characters to distinguish between W. amphibia, W. australis, and W. zosterae. A range of low molecular weight carbohydrates were analyzed but proved to not be taxonomically informative. The distribution range of W. salina is extended to the Northern Hemisphere as this species has been found in brackish lakes in Japan. Furthermore, it is shown that there are no grounds to recognize W. salina var. kraftii, which was described as an endemic variety from a freshwater habitat on Lord Howe Island, Australia. Culture experiments indicate that W. australis has a preference for growth in lower salinities over full seawater. For W. amphibia and W. zosterae, sexual reproduction is documented, and the split of these species is possibly attributable to polyploidization.

History

Preferred citation

Boedeker, C., O'Kelly, C. J., West, J. A., Hanyuda, T., Neale, A., Wakana, I., Wilcox, M. D., Karsten, U. & Zuccarello, G. C. (2017). Molecular phylogeny and taxonomic revision of the genus Wittrockiella (Pithophoraceae, Cladophorales), including the descriptions of W. australis sp. nov. and W. zosterae sp. nov. Journal of Phycology, 53(3), 522-540. https://doi.org/10.1111/jpy.12530

Journal title

Journal of Phycology

Volume

53

Issue

3

Publication date

01/06/2017

Pagination

522-540

Publisher

Wiley

Publication status

Published

Online publication date

04/04/2017

ISSN

0022-3646

eISSN

1529-8817

Language

en

Exports