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LM image scalebar = 10 µm = 72 pixels
SEM image scalebar = 2 µm
Observations
| Observations: | Sarah Spaulding and Rhea Esposito |
|---|---|
| Length: | 6-19 µm |
| Width: | 3-5 µm in the center |
| Striae: | 30-36 in 10 µm |
Description:
Valve linear, strongly gibbous in the middle portion; poles slightly swollen and rounded. Axial area small and linear. Central area wide, generally rounded, and often with a thickening of the valve beneath the central area (see Round et al., 1990 for SEM illustrations of this feature). Raphe straight with simple proximal raphe ends. Striae linear and composed of elongate puncta. Striae may difficult to see in the light microscope.
| Morphology: | Naviculoid |
|---|---|
| Distribution: | Antarctic endemic |
Autecology:
Notes:
The strongly swollen central portion of the valve separates this diatom. Formally called Diadesmis perpusilla Grunow, and revised in light of SEM observations 5 August 2014.
McMurdo Dry Valleys Waterbodies with Humidophila australis
- Aiken Creek
- Bohner Stream
- Bowles Creek
- Canada Glacier
- Canada Stream
- Commonwealth Glacier
- Commonwealth Stream
- Delta Stream
- Green Creek
- Harnish Creek Tributary
- Huey Creek
- Hughes Glacier Pond
- Lost Seal Stream
- Many Glaciers Pond
- McKay Creek
- Miers Stream
- Onyx River
- Picture Pond
- Priscu Stream
- Spaulding Pond
- Von Guerard Stream
- Wharton Creek
Original Type Description
| Author: | Van de Vijver & Sabbe 2010 |
|---|---|
| Length: | 6-19 µm |
| Width: | 2.0-5.0 µm |
| Striae: | 32-36 in 10 |
Original Description:
Valvae lineares parte centrale clare inflata apicibusque lato rotundatis vel interdum leviter inflatis. Longitudo 6-19 µm, latitudo 2.0-5.0 µm. Area axialis moderate lata, area centralis rotunda. Raphe filiformis, recta terminationibus centralibus potius distantibus. Striae transapicales distinguibiles in microscopio photonico, 32-36 in 10 µm, parallellae ad leviter radiatae.
New combination
| Author: | Lowe, Kociolek, Johansen, Van de Vijver, Lange-Bertalot & Kopalová 2014 |
|---|
Citations
Index Nominum Algarum (INA):
- Original
- New Combination
- If an INA link is available, it will be shown above
- The INA is a bibliographic reference "card file" for algal taxonomy, containing nearly 200,000 names of algae (in the broad sense).
