Morphological and phylogenetic analysis of a new <italic style="font-style: italic">Melosira</italic> species and revision of freshwater <italic style="font-style: italic">Melosira</italic> in China

Lin YANG; Pan YU; Qingmin YOU; Guisheng LI; Quanxi WANG

doi:10.1007/s00343-021-0470-x

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Morphological and phylogenetic analysis of a new Melosira species and revision of freshwater Melosira in China

Biology | Updated：2023-05-20

- Morphological and phylogenetic analysis of a new Melosira species and revision of freshwater Melosira in China
- Journal of Oceanology and Limnology Vol. 40, Issue 2, Pages: 712-728(2022)
- Affiliations：
  
  1.College of Environmental and Geographical Sciences, Shanghai Normal University, Shanghai 200235, China
  2.College of Life Sciences, Shanghai Normal University, Shanghai 200235, China
  3.Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430000, China
- Author bio：
  
  Quanxi WANG, E-mail: wangqx@shnu.edu.cn
- Funds：
- DOI：10.1007/s00343-021-0470-x
  CLC：
- Received：11 December 2020，
  
  Accepted：26 January 2021，
  
  Online First：08 April 2021，
  
  Published：2022-03
- Accepted：
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Lin YANG, Pan YU, Qingmin YOU, et al. Morphological and phylogenetic analysis of a new Melosira species and revision of freshwater Melosira in China[J]. Journal of Oceanology and Limnology, 2022, 40(2): 712-728.
DOI：

Lin YANG, Pan YU, Qingmin YOU, et al. Morphological and phylogenetic analysis of a new Melosira species and revision of freshwater Melosira in China[J]. Journal of Oceanology and Limnology, 2022, 40(2): 712-728. DOI： 10.1007/s00343-021-0470-x.

摘要

Abstract

Melosira

is one of the most common diatom genera found in freshwater ecosystems. There are many freshwater species of

Melosira

of which

M. varians

is the most common. In our investigation of periphytic diatoms in the Jinsha River

China

a new species

M. capsularum

sp. nov

was characterized in combined morphological and molecular approaches.

M. varians

was also analyzed using molecular data. The new species is similar to

M. varians

M. moniliformis

M. nummuloides

and

M. lineata

in morphology. The cells are capsular and join to filaments by mucilage pads that are secreted on the valve face and united into pairs by their cingula. The valve face is domed and covered with small granules

and the valve mantle edge has a milled appearance. The two strains of

M. capsularum

are in a single clade obviously away from other

Melosira

species

as determined in phylogenetic analysis based on nuclear small subunit (SSU) rDNA sequences and the chloroplast-encoded

rbc

L gene. Thus

the results of morphological comparisons and phylogenetic analysis based on molecular data provide strong evidence that

M. capsularum

is a new species

thereby increasing the total number of recognized freshwater diatom species in China. In addition

we have systematically reclassified the freshwater

Melosira

that have been recorded in China.

关键词

Keywords

references

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Morphological and phylogenetic analysis of a new Melosira species and revision of freshwater Melosira in China

DOI：10.1007/s00343-021-0470-x

摘要

Abstract

关键词

Keywords

references