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LM image scalebar = 10 µm = 38 pixels
SEM image scalebar = 10 µm
Observations
| Observations: | Tyler Kohler |
|---|---|
| Length: | 37.7-58.9 µm |
| Width: | 4.-6.3 µm (center valve), |
| Striae: | 18-26 in 10 µm at the center; 20-26 in 10 µm at the ends |
Description:
Valves linear-lanceolate, narrowing towards the produced, capitate endings; ventral margin concave; dorsal margin parallel to slightly concave. Raphe eccentric, stretching along the valve margin; proximal raphe endings simple; distal raphe endings hooked towards the dorsal margin. Striae parallel throughout; more widely spaced at the center of the valve. Fibulae (keel puncta) variable in size and spacing.
| Morphology: | Nitzschioid |
|---|---|
| Distribution: | South Victorialand endemic |
Autecology:
Notes:
This diatom was usually encountered in girdle view and often with 'hantzschioid' symmetry, although this appears to be a species of Nitzschia. Our specimens were similar to Nitzschia commutata sensu Krammer and Lange-Bertalot (1988), but had a much smaller size range. Our specimens were also similar to Nitzschia stagnorum sensu Hustedt (1930) but were narrower with more capitate endings. Thus, we propose that this may be a new species of Nitzschia, although we retain the name N. commutata. This specimen was formally referred to as Hantzschia sp.#5 and Nitszchia commutata.
McMurdo Dry Valleys Waterbodies with Nitzschia australocommutata
- Adams Stream
- Aiken Creek
- Bohner Stream
- Bowles Creek
- Canada Stream
- Commonwealth Stream
- Crescent Stream
- Delta Stream
- Green Creek
- Harnish Creek
- Harnish Creek Tributary
- Huey Creek
- Lake Fryxell
- Lawson Creek
- Little Sharpe
- Lost Seal Stream
- Lyons Tributary (Mason?)
- McKay Creek
- Onyx River
- Priscu Stream
- Von Guerard Stream
- Wales Stream
- Wharton Creek
- Wormherder Creek
Original Type Description
| Author: | Hamsher et al. 2016 |
|---|---|
| Length: | |
| Width: | |
| Striae: |
Original Description:
New combination
| Author: |
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Citations
Index Nominum Algarum (INA):
- 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 1930. p. 405, fig. 773. [citation 51(22)]
- Krammer and Lange-Bertalot 1988. p. 56-57, taf. 42, figs 1-6. [citation 74(53)]
