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Please use this identifier to cite or link to this item: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/29488

Title: SYSTEMATICS OF THE CALCIFIED GENERA OF THE GALAXAURACEAE (NEMALIALES, RHODOPHYTA) WITH AN EMPHASIS ON TAIWAN SPECIES
Authors: Wei-Lung Wang;Shao-Lun Liu;Showe-Mei Lin
Contributors: NTOU:Institute of Marine Biology
國立臺灣海洋大學:海洋生物研究所
Keywords: Actinotrichia;cystocarp development;Dichotomaria;Galaxaura;Galaxauraceae;rbcL;Rhodophyta;systematics;Tricleocarpa
Date: 2005-06
Issue Date: 2011-10-21T03:06:28Z
Publisher: Journal of Phycology
Abstract: Abstract:The current separation of the calcified genera Actinotrichia Decaisne, Galaxaura Lamouroux, and Tricleocarpa Huisman et Borowitzka in the Galaxauraceae is largely based on type of life history (whether the gametophytes and tetrasporophytes are isomorphic or heteromorphic with respect to gross morphology or cortical-cell features) and on features of postfertilization development (such as the composition of the pericarp). We reexamined the phylogenetic relationships of these genera based on comparative rbcL sequence analysis, types of life cycle, and cystocarp development. Four distinct assemblages have been identified: an Actinotrichia clade, a Tricleocarpa clade, a Galaxaura clade (containing the type species), and a Dichotomaria clade made of a number of formerly Galaxaura species (D. obtusata [Ellis et Solander] Lamarck, D. marginata [Ellis et Solander] Lamarck, and D. diesingiana [Zanardini] Huisman, Harper and Saunders). Key differences between Dichotomaria and Galaxaura include the habit of the gametophytic and tetrasporophytic generations (isomorphic in Dichotomaria and dimorphic in Galaxaura) as well as the presence or absence of a persistent pericarp in the cystocarp (present in Dichotomaria and absent in Galaxaura). Molecular data do not support monophyly for the putatively pantropical species Galaxaura rugosa, Dichotomaria obtusata, and D. marginata, all of which we conclude are in need of taxonomic revision.
Relation: 41(3), pp.685–703
URI: http://ntour.ntou.edu.tw/handle/987654321/29488
Appears in Collections:[海洋生物研究所] 期刊論文

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