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Huina LIN, Weiwei WU, Lin SUN, Andrzej WITKOWSKI, Xiaoye LI, Vishal PATIL, Junrong LIANG, Xuesong LI, Yahui GAO, Changping CHEN. Chinia gen. nov.—the second diatom genus simonsenioid raphe from mangroves in Fujian, China[J]. Journal of Oceanology and Limnology, 2022, 40(3): 1220-1232

Chinia gen. nov.—the second diatom genus simonsenioid raphe from mangroves in Fujian, China

Huina LIN1, Weiwei WU1, Lin SUN2, Andrzej WITKOWSKI3, Xiaoye LI1, Vishal PATIL1, Junrong LIANG1, Xuesong LI1, Yahui GAO1,2, Changping CHEN1
1 School of Life Sciences and Key Laboratory of Ministry of Education for Coastal and Wetland Ecosystems, Xiamen University, Xiamen 361102, China;
2 State Key Laboratory of Marine Environmental Science, Xiamen University, Xiamen 361102, China;
3 Institute of Marine and Environmental Sciences, University of Szczecin, Mickiewicza 16 a, PL-70-383 Szczecin, Poland
A new monotypic diatom genus Chinia gen. nov. from estuarine mangrove habitats in Fujian, China is described. Light, scanning and transmission electron microscopy observations of its morphology show that this diatom differs from any established raphid diatom genus. The new genus is distinguished by a strongly undulate valve face, eccentric raphe canal, and perforated copulae. Its distinctly elevated and perforated raphe canal, classified as simonsenioid type, is supported by sparse infundibulum-like portulae, and the portulae are separated by large fenestrae. The valves of Chinia also have hymenate areolar occlusions and the raphe lacks a central nodule. However, unlike most Bacillariaceae with two plastids, including Simonsenia, Chinia has a single plastid similar to those in Entomoneis and Surirella. Despite the similarities to Simonsenia, Chinia features porous raphe canal and loose striation, which is different from those of Simonsenia that has a solid raphe canal and distinct rows of areolae. These distinctive cytological and morphological characters suggest an affinity of the new genus to the Bacillariaceae.
Key words:    marine diatoms|East China Sea|taxonomy|Bacillariaceae|new genus|simonsenioid raphe   
Received: 2021-02-22   Revised:
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