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Citation for Study 2106

About Citation title: "A new araphid diatom genus Psammoneis gen. nov. (Plagiogrammaceae, Bacillariophyta) with three species based on SSU and LSU rDNA and morphology".
About This study was previously identified under the legacy study ID S2109 (Status: Published).

Citation

Sato S., Kooistra W., Watanabe T., Matsumoto S., & Medlin L. 2008. A new araphid diatom genus Psammoneis gen. nov. (Plagiogrammaceae, Bacillariophyta) with three species based on SSU and LSU rDNA and morphology. Phycologia, null.

Authors

  • Sato S.
  • Kooistra W.
  • Watanabe T.
  • Matsumoto S.
  • Medlin L.

Abstract

Five strains of a hitherto undescribed diatom genus Psammoneis were established from Japanese and Senegalese marine benthic samples. Strains were analysed using nuclear-encoded sequence markers and morphometric parameters of their silica frustules. Valves of all strains show a sternum with striae perpendicular thereupon, typical for pennate diatoms. They possess apical pore fields and lack a raphe, typical for araphids, but also rimoportulae and areola occlusions. Sequence comparison of both the SSU rDNA and the D1/D2 region of the LSU rDNA revealed that the strains group into three markedly distinct genotypes. The strains from different genotypes are also distinguishable by a principal component analysis using four morphometric variables measured on the external valve surface. They are described as three new species in a new genus Psammoneis as P. japonica, P. pseudojaponica and P. senegalensis. Molecular phylogenies support placement of the genus Psammoneis as a member of the Plagiogrammaceae. However, this placement renders the family morphologically more heterogeneous, especially with regards to the areola structure. Therefore, we provide an emended description of the family.

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  • Canonical resource URI: http://purl.org/phylo/treebase/phylows/study/TB2:S2106
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