Pleurosigma
| Pleurosigma | |
|---|---|
| |
| Pleurosigma angulatum | |
Scientific classification 
| |
| Domain: | Eukaryota |
| Clade: | Diaphoretickes |
| Clade: | SAR |
| Clade: | Stramenopiles |
| Phylum: | Gyrista |
| Subphylum: | Ochrophytina |
| Class: | Bacillariophyceae |
| Order: | Naviculales |
| Family: | Pleurosigmataceae |
| Genus: | Pleurosigma W. Smith, 1852 |
Pleurosigma is a genus of widely distributed
planktonic samples.[1]
Characteristics
Pleurosigma is mainly a
chloroplasts observed in the shape of ribbons under a microscope. The central nucleus composes the core of the cytoplasm. During anaphase, daughter chromosomes join at the poles of the spindle apparatus, and then move farther apart. During telophase, the daughter nuclei are organized. Cytokinesis starts during anaphase, where a small cleavage slices the cytoplasm into two along the valvar plane.[2] The median part of each chloroplast branches into a large, elongated lobe along the interior of one of the valves, and into two similar lobes on the other valve. Cell division begins by a fissure across the median lobe. After the division, the parts of the chloroplast migrate to the inner side of the old valves.[3]
Species
The following list displays the accepted species belonging to Pleurosigma. Many species of the genus were described by Albert Mann in 1925, but remained unrecorded due to hasty documentation. In 2002, the
synonyms of others.[4]
- Pleurosigma acus A. Mann, 1925[4]
- Pleurosigma amara Stidolph, 1992[5]
- Pleurosigma dolosum A. Mann, 1925[4]
- Pleurosigma exemptum A. Mann, 1925 (=P. obesum A. Mann, 1925)[4]
- Pleurosigma frenguellianum Sterrenburg, Sunesen & Sar, 2014[6]
- Pleurosigma hinzianum Sterrenburg, Sunesen & Sar, 2014[6]
- Pleurosigma normanii Ralfs in Pritchard, 1861 (=P. falx A. Mann, 1925)[4]
- Pleurosigma obtusum A. Mann, 1925 (=P. prisma A. Mann, 1925)[4]
- Pleurosigma pacificum Fei-Chao Du, Yu-Hang Li & Kui-Dong Xu, 2023[1]
- Pleurosigma rigens A. Mann, 1925[4]
- Pleurosigma suluense A. Mann, 1925[4]
References
- ^ .
- ^ Powers, Daniel Jerome Finley (15 May 2020). The Role of Silicate in the Parasitism of Pleurosigma sp. Diatoms by the Thraustochytrid Phycophthorum isakeiti (Master thesis). The Arctic University of Norway.
- ^ .
- .
- ^ hdl:11336/101501.
| Authority control databases: National |
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