Published January 11, 2024
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A new species of genus Crenotia (Bacillariophyta) from Tibet, China
Authors/Creators
- 1. Harbin Normal University, Harbin, China
- 2. University of Colorado, Boulder, United States of America
- 3. K. A. Timiryazev Institute of Plant Physiology RAS, IPP RAS, Moscow, Russia
- 4. Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, China
Description
During the investigation of the freshwater diatoms from Tibet, a monoraphid species was observed from a hot spring near Anduo County, located on a plateau in the central portion of Tibet. This species shares the diagnostic features of Crenotia, such as the valve bent along the transapical axis, striae uniseriate to biseriate from centre to the apices and areolae with special structures located at the end of each stria. We compared the morphological characters of this new species with the others in this genus and show it to be new; it is named Crenotia tibetia sp. nov. This species has small valves with slightly protracted ends with nearly capitate apices, lanceolate axial area, central area unilaterally expanded to the margin, striae uniseriate to biseriate, but, in some valves, the striae are only uniseriate. Areolae are round small to irregular in shape and, at the end of each stria, there is a horseshoe-shaped areola present. Observations of developing valves show all the striae begin biseriate, then they become covered by silica to form uniseriate striae. Comparisons are made amongst the species in this genus and with genera assigned to the Achnanthidiaceae.
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References
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