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Detail description of lithophyllum okamurae(Lithophylloideae,Corallinales), a widely distributed crustose coralline alga in marine ecosystems

引用

Acta Oceanologica Sinica 2020年第6期39卷 96-106页

作者： Qunju Hu Fangfang Yang Zhangliang Wei Jiahao Mo Chao Long Xinpeng Tian Lijuan Long CAS Key Laboratory of Tropical Marine Bio-resources and Ecology South China Sea Institute of OceanologyChinese Academy of SciencesGuangzhou 510301China University of Chinese Academy of Sciences Beijing 100049China

lithophyllum okamurae is one of the important encrusting coralline algae,which plays important roles as primary producer,carbonate sediment builder,and habitat provider in the marine *** this study,*** was collected from tropical coast of Sanya,and firstly described based on both detailed morph-anatomical characteristics and molecular studies of typic DNA *** structure of the thalli of *** was pseudoparenchymatous construction with radially organized dimerous organizations in the crustose *** pseudoparenchymatous construction were composed of three parts,including 1 to 3 layers of epithelia cells which had flatten to round outermost walls,one layer of square or rectangular cells of the hypothallia and multiple layers of square or elongated rectangular peripheral *** cells were observed,and the cells of the contiguous vegetative filaments were connected by secondary pit-connections with cell fusions *** carposporangial conceptacles,the spermatangial conceptacles,the bisporangial conceptacles and the tetrasporangial conceptacles were observed,and all these four kinds of conceptacles were *** spermatangial conceptacles were slightly convex and buried at shallow depths in the thalli tissues,and the carposporangial conceptacles and asexual conceptacles were protruding and *** studies based on DNA barcoding markers of 18 S rDNA,COI,rbc L and psb A revealed that *** clustered with the closest relation of ***,and formed a distinct *** on the comparative anatomical features and the molecular data,the detailed description of the valid species of *** was firstly given in this study to provide theoretical basis for algae resources utilization and conservation in marine ecosystems.

关键词： lithophyllum okamurae crustose coralline algae marine ecosystem morphological characteristics conceptacles DNA-barcoding

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