Images
Click any image to enlarge...
LM image scalebar = 10 µm = 72 pixels
SEM image scalebar = 2 µm
Observations
| Observations: | Sarah Spaulding and Rhea Esposito |
|---|---|
| Length: | 12-26 µm |
| Width: | 6-9.5 µm |
| Striae: | 16-18 in 10 µm in the center; 18-22 per 10 micrometers at the ends |
Description:
Valve elliptical with broadly extendend, subcapitate endings. Narrow axial area present. Central area varying from elliptical to an acute-angled area, usually with a single row of poroids around the outer edge. A solitary stigma present in the central area. Raphe straight; median and terminal raphe endings slightly hooked in the opposite direction of the stigma. Striae radiate throughout, poroids elongate in appearance.
| Morphology: | Naviculoid |
|---|---|
| Distribution: | Antarctic endemic |
Autecology:
Notes:
This species is similar to L. muticopsis var. capitata but the central portion of the valve is much more rounded, and the poroids of the transapical striae are more elongate. West and West (1911) and Fritsch (1912) both appear to have identified this same diatom but identified it as Pinnularia globiceps and P. globiceps fo. amphicephala, respectively. Hustedt (1966) elevated Navicula muticopsis var. gaussii to the species level and synonymized P. globiceps (sensu West and West, 1911) with it. The specimens of Navicula gausii observed by Hustedt (1966) had a length of 16-34 µm and width of 9-14 µm. The specimens identified in this study have a smaller size range and more closely conform with the size ranges given by West and West (1911) and Fritsch (1912). Because the original description of N. muticopsis var. gaussii by Heiden (1928) gives a length of 30-31 µm and width of 12-14, the species in the Dry Valleys region may not be the same as the one described by Heiden (1928).
McMurdo Dry Valleys Waterbodies with Luticola gaussii
- Adams Stream
- Aiken Creek
- Blue Lake
- Bowles Creek
- Canada Glacier
- Canada Stream
- Clear Lake
- Coast Lake
- Commonwealth Glacier
- Commonwealth Stream
- Crescent Stream
- Delta Stream
- Garwood Stream
- Green Creek
- Harnish Creek Tributary
- Huey Creek
- Lake Fryxell
- Little Sharpe
- Lost Seal Stream
- Many Glaciers Pond
- McKay Creek
- Miers Stream
- Onyx River
- Picture Pond
- Pond by Blue Lake
- Priscu Stream
- Spaulding Pond
- Upland Pond
- Von Guerard Stream
- Wales Stream
- Wharton Creek
- Wormherder Creek
Original Type Description
| Author: | Heiden 1938 |
|---|---|
| Length: | 30-31 µm |
| Width: | 12-14 µm |
| Striae: | 14-16 in 10 µm |
Original Description:
Unterscheidet sich vom Typus durch das abgerundete, die Schalenränder nicht erreichende Mittelfeld und die etwas engere Streifung. Länge 30-31 µ, Breite 12-14 µ, Streifen 140-160 in 100 µ.
New combination
| Author: | Mann, D.G. 1990 |
|---|
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).
Publications (by year):
- Hustedt 1966. p. 616-18, fig. 1615. [citation 50(18)]
- Baker 1967. p. 464, fig. 4r. [citation 3(1)]
- Kellogg et al. 1980. p. 181, pl. 1, fig. 21. [citation 64(27)]
