SYSTEMATIC REVISION OF THE GENERA LIAGORA AND IZZIELLA (LIAGORACEAE, RHODOPHYTA) FROM TAIWAN BASED ON MOLECULAR ANALYSES AND CARPOSPOROPHYTE DEVELOPMENT, WITH THE DESCRIPTION OF TWO NEW SPECIES

Some Liagora and Izziella distributed in Taiwan display a wide range of morphological variation and can be difficult to distinguish. To clarify species concepts, we applied DNA sequence analyses and examined carposporophyte development in detail. These studies revealed two new species, which are des...

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Published in:Journal of phycology 2011-04, Vol.47 (2), p.352-365
Main Authors: Lin, Showe-Mei, Yang, Shi-Yuan, Huisman, John M
Format: Article
Language:English
Subjects:
cell fusion
Izziella
Izziella formosana comb. nov
Izziella hommersandii sp. nov
Izziella kuroshioensis sp. nov
Liagora
Liagoraceae
LSU rRNA gene
molecular phylogeny
new species
nucleotide sequences
rbcL
Rhodophyta
sequence analysis
Taiwan
Titanophycus setchellii comb. nov
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Yang, Shi-Yuan
Huisman, John M
description Some Liagora and Izziella distributed in Taiwan display a wide range of morphological variation and can be difficult to distinguish. To clarify species concepts, we applied DNA sequence analyses and examined carposporophyte development in detail. These studies revealed two new species, which are described herein as Izziella hommersandii sp. nov. and Izziella kuroshioensis sp. nov. I. kuroshioensis superficially resembles Izziella formosana and Izziella orientalis in that its involucral filaments subtend rather than surround the lower portion of the gonimoblast mass (= Izziella type) and a fusion cell is formed from cells of the carpogonial branch, but it can be separated by differences in the cell numbers and branching pattern of the involucral filaments, as well as thallus morphology. In contrast to other species that also bear short lateral branchlets, I. hommersandii is unique in possessing a mixture of short and long involucral filaments, a phenomenon not reported before. The length of the involucral filaments is species specific among species of Izziella and contrasts to the behavior of the involucral filaments after fertilization in species such as “Liagora”setchellii [= Titanophycus setchellii comb. nov.], in which the filaments completely envelop the gonimoblast. In addition, the cells of the carpogonial branch in Titanophycus do not fuse after fertilization to form a fusion cell. Thus, a combination of characters with respect to the behavior of the carpogonial branch and the involucral filaments after fertilization is very useful for delineating species boundaries in Izziella and for separating Titanophycus from Izziella and Liagora.
doi_str_mv 10.1111/j.1529-8817.2011.00965.x
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Accepted 26 July 2010.</notes><notes>ark:/67375/WNG-22T9LVRP-6</notes><notes>istex:71F5A9796C525F707D64068DB5AE69FAC186DEC3</notes><notes>ObjectType-Article-1</notes><notes>SourceType-Scholarly Journals-1</notes><notes>ObjectType-Feature-2</notes><notes>content type line 23</notes><abstract>Some Liagora and Izziella distributed in Taiwan display a wide range of morphological variation and can be difficult to distinguish. To clarify species concepts, we applied DNA sequence analyses and examined carposporophyte development in detail. These studies revealed two new species, which are described herein as Izziella hommersandii sp. nov. and Izziella kuroshioensis sp. nov. I. kuroshioensis superficially resembles Izziella formosana and Izziella orientalis in that its involucral filaments subtend rather than surround the lower portion of the gonimoblast mass (= Izziella type) and a fusion cell is formed from cells of the carpogonial branch, but it can be separated by differences in the cell numbers and branching pattern of the involucral filaments, as well as thallus morphology. In contrast to other species that also bear short lateral branchlets, I. hommersandii is unique in possessing a mixture of short and long involucral filaments, a phenomenon not reported before. The length of the involucral filaments is species specific among species of Izziella and contrasts to the behavior of the involucral filaments after fertilization in species such as “Liagora”setchellii [= Titanophycus setchellii comb. nov.], in which the filaments completely envelop the gonimoblast. In addition, the cells of the carpogonial branch in Titanophycus do not fuse after fertilization to form a fusion cell. Thus, a combination of characters with respect to the behavior of the carpogonial branch and the involucral filaments after fertilization is very useful for delineating species boundaries in Izziella and for separating Titanophycus from Izziella and Liagora.</abstract><cop>Oxford, UK</cop><pub>Blackwell Publishing Ltd</pub><pmid>27021867</pmid><doi>10.1111/j.1529-8817.2011.00965.x</doi><tpages>14</tpages></addata></record>
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subjects cell fusion
Izziella
Izziella formosana comb. nov
Izziella hommersandii sp. nov
Izziella kuroshioensis sp. nov
Liagora
Liagoraceae
LSU rRNA gene
molecular phylogeny
new species
nucleotide sequences
rbcL
Rhodophyta
sequence analysis
Taiwan
Titanophycus setchellii comb. nov
title SYSTEMATIC REVISION OF THE GENERA LIAGORA AND IZZIELLA (LIAGORACEAE, RHODOPHYTA) FROM TAIWAN BASED ON MOLECULAR ANALYSES AND CARPOSPOROPHYTE DEVELOPMENT, WITH THE DESCRIPTION OF TWO NEW SPECIES
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