首页|Yuzaoea gen.nov.,a new biraphid diatom(Bacillariophyceae)genus and its phylogenetic significance
Yuzaoea gen.nov.,a new biraphid diatom(Bacillariophyceae)genus and its phylogenetic significance
扫码查看
点击上方二维码区域，可以放大扫码查看
原文链接
NETL
NSTL
万方数据
The flexed frustules in pennate diatoms are usually associated with monoraphid diatoms.Interestingly,we found a biraphid diatom species with flexed frustules in an offshore intertidal beach environment on Weizhou Island,Beihai City,Guangxi Zhuang Autonomous Region,China.Therefore,based on morphological characteristics,we described a new genus of diatoms Yuzaoea sinensis gen.et sp.nov.CH Li,HH Liu,YH Gao&CP Chen.The frustule of this genus is characterized by heterogeneous frustule with one concave valve and one convex valve,complete raphe on both valves,straight and moderately eccentric raphe,uniseriate striae and girdle bands with a single row of areolae.The most identifying feature of this genus was the flexed frustule,which is rare in biraphid diatoms and common in monoraphid diatoms.We compared the morphometric characteristics of genus Yuzaoea with genus Rhoikoneis and several genera within the family Rhoicospheniaceae,including Rhoicosphenia,Campylopyxis,and Cuneolus.Phylogenetic analyses based on SSU rRNA and rbcL showed that the genus Yuzaoea was the sister group to the clade of Rhoicosphenia with a high support value(bootstrap values = 100%),and the clade"Yuzaoea+Rhoicosphenia"was sister to the clade of monoraphid diatoms,in which the genera Achnanthidium,Planothidium and some Cocconeis with high support values(bootstrap = 100%).Morphologically,the genus Yuzaoea shares many morphological features with monoraphid diatoms like genera Achnanthidium and Planothidium and the members within the Rhoicospheniaceae.Therefore,based on a combined morphological studies and phylogenetic results we suggested that this branch may represented the evolution of one kind monoraphid diatoms,from biraphid diatoms(e.g.genus Yuzaoea),to incompleted biraphid diatoms(e.g.genera Rhoicosphenia,Campylopyxis),to monoraphid diatoms(e.g.genera Achnanthidium and Planothidium).
Key Laboratory of Ministry of Education for Coastal and Wetland Ecosystems and School of Life Sciences,Xiamen University,Xiamen 361102,China
Guangxi Key Laboratory of Marine Environmental Science,Guangxi Academy of Marine Sciences,Guangxi Academy of Sciences,Nanning 530007,China
Beibu Gulf Marine Industry Research Institute,Fangchenggang 538000,China
State Key Laboratory of Marine Environmental Science,Xiamen University,Xiamen 361102,China
展开 >
National Key Research and Development Program of ChinaNatural Science Foundation of ChinaNatural Science Foundation of ChinaNatural Science Foundation of Xiamen
NETL
NSTL
万方数据
