Capensia fucorum (Esper) gen. et comb. nov. (Mesophyllaceae, Corallinales, Rhodophyta), a hemiparasite on Gelidium from South Africa
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Athanasios Athanasiadis (PhD, Docent) is a research associate at the herbarium of the University of Gothenburg. He has a lengthy list of publications on the taxonomy and systematics of marine algae, and most recently accomplished a review of the European Rhodophyta (Phycologia Europaea Rhodophyta).
www.bioenv.gu.se/personal/Athanasios_Athanasiadis_sv/ .
Abstract
Capensia fucorum (=Mesophyllum capense) is described as the first hemiparasitic coralline genus and species infecting a non-coralline host (species of Gelidium). Amongst coralline algae, Capensia also exhibits a unique thallus organisation displaying sympodial branching at the margin and a monostromatic hypothallium with gradually ascending and descending filaments in the main thallus. Sympodial branching occurs from the ventral side of hypothallial cells and guarantees close adhesion to the host, while older hypothallial filaments are displaced dorsally to form the perithallium. Haustoria develop as terminal cells of descending filaments and penetrate the first and occasionally second cortical layer of the host. Capensia is monotypic with restricted distribution on Gelidium capense and Gelidium pteridifolium from South Africa. The generitype Capensia fucorum (= Millepora fucorum Esper) is originally described from the Cape of Good Hope. The new hemiparasitic genus, like its synonym, belongs to Mesophyllaceae and its closer relationship remains to be identified, starting the search in members of this family co-occurring with Capensia in South Africa.
About the author
Athanasios Athanasiadis (PhD, Docent) is a research associate at the herbarium of the University of Gothenburg. He has a lengthy list of publications on the taxonomy and systematics of marine algae, and most recently accomplished a review of the European Rhodophyta (Phycologia Europaea Rhodophyta). www.bioenv.gu.se/personal/Athanasios_Athanasiadis_sv/.
Acknowledgements
Thanks are due to Marianne Hamnede and Arne Anderberg (Riksmuseum in Stockholm) and Willem Prud’homme van Reine (Nationaal Herbarium Nederland) for generous loans of collections including type specimens. Two reviewers and the editor made helpful comments and corrections for improving the text and the illustrations.
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Articles in the same Issue
- Frontmatter
- In this issue
- Taxonomy/phylogeny and biogeography
- Neoharaldiophyllum, a new genus of Delesseriaceae (Rhodophyta) based on carposporophyte development and molecular data
- Gracilaria coppejansii sp. nov. (Gracilariales, Rhodophyta), a new flattened species from the Andaman coast of southern Thailand
- Morphological and phenological reexamination of the threatened endemic species Gelidium canariense (Gelidiales, Rhodophyta) from the Canary Islands
- Capensia fucorum (Esper) gen. et comb. nov. (Mesophyllaceae, Corallinales, Rhodophyta), a hemiparasite on Gelidium from South Africa
- Morphological and molecular characterization of Hapalospongidion gelatinosum, Hapalospongidiaceae fam. nov. (Ralfsiales, Phaeophyceae) from Mexico
- First record of Ruppia maritima in West Africa supported by morphological description and phylogenetic classification
