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Please use this identifier to cite or link to this item: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/45877

Title: Revising the systematics of Ganonema (Liagoraceae, Rhodophyta) with emphasis on species from the northwest Pacific Ocean.
Authors: Showe-Mei Lin
John M. Huisman
David L. Ballantine
Contributors: 國立臺灣海洋大學:海洋生物研究所
Keywords: Trichogloeopsis
Carposporophyte development
Molecular phylogeny
Northwest Pacific Ocean
Date: 2014
Issue Date: 2018-04-16T03:26:42Z
Publisher: Phycologia
Abstract: Abstract: The genus Ganonema was distinguished from the other genera in the Liagoraceae morphologically by several reproductive and vegetative features, including spermatangia formed in dense, dendroidal clusters; carpogonial branches remaining unfused after fertilisation, having compact gonimoblasts; and medullary filaments being relatively broad. In addition, the generitype G. farinosum was uniquely characterised by its carpogonial branches being borne on small, specialised branches arising from the basal part of assimilatory filaments, a feature not seen in other species of Ganonema. Our molecular analyses, incorporating several species currently attributed to Ganonema, showed that the genus was polyphyletic and represented in three independent lineages, one including the generitype G. farinosum, a second including ‘G' dendroideum, and a third containing three ‘Ganonema' (‘G.' clavatum, ‘G.' borowitzkae and ‘G.' samaense) from the northwest Pacific Ocean. We have therefore proposed two segregate genera, Gloiocallis gen. nov. for ‘G.' dendroideum and Hommersandiophycus gen. nov. for ‘G.' clavatum, ‘G.' borowitzkae and ‘G.' samaense. Morphologically, Gloiocallis differed from Ganonema and Hommersandiophycus in having only a few involucral filaments produced from the cortical cells above the supporting cell and most cells of the gonimoblasts differentiating into carposporangia. Hommersandiophycus can be separated from related genera by a combination of unfused carpogonial branches, involucral filaments produced from the cortical cells above and below the supporting cell and its neighbouring cells, carposporangia differentiating sequentially in chains of two to three and gonimoblasts being hemispherical to spherical. The taxonomy of other species currently placed in Ganonema but not analysed in this study requires further work.
Relation: 53(1) pp.37-51
URI: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/45877
Appears in Collections:[海洋生物研究所] 期刊論文

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