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LM image scalebar = 10 µm = 72 pixels
SEM image scalebar = 1 µm
Observations
| Observations: | S. Spaulding & R. Esposito |
|---|---|
| Length: | 5.5-16 µm |
| Width: | 2-3 µm |
| Striae: | 30-36 in 10 µm |
Description:
Valve margin linear with broad, rounded ends. Axial area narrow or indistinct. 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: | Widespread |
Notes:
This form differs from the nominate variety by its smaller size and parallel valve margins. Similar to the findings of Kellogg et al. (1980), our specimens were typically smaller than the nominate form.
Waterbodies with Diadesmis contenta var. parallela
- Aiken Creek
- Bowles Creek
- Canada Stream
- Delta Stream
- Green Creek
- Harnish Creek Tributary
- Lake Fryxell
- Von Guerard Stream
Original Type Description
| Author: | Peterson 1928 |
|---|---|
| Length: | 8.7 µm |
| Width: | 2.3 µm |
| Striae: | not visible |
Original Description:
Valva lineari, sine inflationes, long. 8.7 µm, lat. 2.3 µm, striis invisbilibus.
New combination
| Author: | Spaulding 1997 |
|---|
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):
- Peterson 1928. Dansk Bot. Arkiv. 5:15 fig. 2 [citation 95(78)]
- Hustedt 1930. p. 277, pl. 458, fig. b [citation 51(20)]
- Kellogg et al. 1980. p. 180, Pl. 1, fig. 26. [citation 64(25)]
- Spaulding et al. 1997. J. Paleolimnology 17:403-420 [citation 114(94)]
