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DING Lanping, TAN Huaqiang, ZHANG Quanliang, ZENG Lingzhao, HUANG Bingxin. Morphological study of the genus Herposiphonia(Rhodophyta, Rhodomelaceae) on the coast of eastern Guangdong, China, with a description of H. pinnata sp. nov.[J]. Journal of Oceanology and Limnology, 2016, 34(2): 271-282

Morphological study of the genus Herposiphonia(Rhodophyta, Rhodomelaceae) on the coast of eastern Guangdong, China, with a description of H. pinnata sp. nov.

DING Lanping1,2, TAN Huaqiang1, ZHANG Quanliang1, ZENG Lingzhao1, HUANG Bingxin1,2
1 Shantou University, Shantou 515063, China;
2 Tianjin Key Laboratory of Animal and Plant Resistance, College of Life Sciences, Tianjin Normal University, Tianjin 300387, China
We present a taxonomic study of taxa of the red algae genus Herposiphonia(Rhodophyta, Rhodomelaceae), collected from the coast of eastern Guangdong, China. We made detailed morphological studies and considered recent taxonomic criteria for species delimitation, and are making the first report of five different species on the coast of Guangdong, including a new species. The species identifi ed were H. caespitosa Tseng, H. hollenbergii Dawson, H. pecten-veneris(Harvey) Falkenberg, H. subdisticha Okamura and H. pinnata Ding and Tan sp. nov. H. pinnata sp. nov. is characterized by bright green thalli; most parts of the feathery thalli are free of the substratum; determinate branches and indeterminate branches are arranged in a chaotic sequence; the primary axis has bare segments; the determinate branch has 9-11 periaxial cells per segment; vegetative trichoblasts are abundant; and tetrasporangia are formed on the middle of the determinate branch with 1-8 successive segments in a single rectilinear series. This paper is also the first record of sporophyte plants of H. pecten-veneris.
Key words:    new species|morphological taxonomy|Guangdong Province|biogeography distribution   
Received: 2014-11-28   Revised: 2015-01-26
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