Abstract
We describe a new species of Discostella from Guiyang based on light and scanning electron microscopic observations, as well as molecular analysis. This species is morphologically distinguished from other species by a relatively smooth and slightly recessed central area with marginal striae of unequal lengths forked near the margin. Marginal fultoportulae and a single rimoportula are situated between every two costae or on the costae. Both morphological characters and the concatenated data of rbcL and SSU rDNA indicate that Discostella guiyangensis is a unique and new species. According to divergence time estimation analysis, Discostella guiyangensis is the oldest species among the Discostella species sequenced currently. In addition, we complement molecular data of Discostella asterocostata and Discostella stelligera.
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Data Availability Statement
The datasets generated during and/or analyzed during the current study are available from the corresponding author on reasonable request.
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In addition, we are also grateful to Shanxi Academy of Advanced Research and Innovation in acquiring SEM images.
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Supported by the National Natural Science Foundation of China (No. 31970217) and the Scientific and Technological Innovation Programs of Higher Education Institution in Shanxi (No. 2019L0070)
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Xiang, Y., Nan, F., Liu, X. et al. A new species of Discostella guiyangensis sp. nov. (Bacillariophyta, Stephanodiscales) from Guiyang, China: morphology and phylogeny. J. Ocean. Limnol. (2024). https://doi.org/10.1007/s00343-023-3123-4
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DOI: https://doi.org/10.1007/s00343-023-3123-4