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Observations
| Observations: | S. Spaulding & R. Esposito |
|---|---|
| Length: | 10-17 µm |
| Width: | 5-6 µm |
| Striae: | 26-30 in 10 µm at the center; 28-32 in 10 µm at the ends |
Description:
Valve elliptical lanceolate with broadly rounded ends. Central area varying from rectangular to an acute angled oval. Raphe simple and straight; slightly narrowed at the distal ends. Striae radiate throughout, becoming more finely spaced toward the apices. Morphology of the pseudo raphe valve is similar to that of the raphe valve in shape and striae pattern, although the striae appear to be more finely spaced on the pseudo raphe valve.
| Morphology: | Monoraphid |
|---|---|
| Distribution: | Widespread |
Notes:
This diatom most closely resembles the description given by Hohn and Hellerman (1963), but their figure appears to have a much narrower central area. Thus, there is some question as to whether this is a different species of Achnanthes. Although this diatom was quite abundant in many of the samples collected, it has only been recorded in the Dry Valleys by Spaulding et al. (1997). Kellogg et al. (1980) illustrate a superficially similar species, which they identify as Navicula papillo. However, specimens found in that study appear to posess a pseudo raphe valve, placing them in the achnanthoid group.
Waterbodies with Psammothidium chlidanos
- Aiken Creek
- Bowles Creek
- Canada Stream
- Delta Stream
- Green Creek
- Harnish Creek Tributary
- Lake Fryxell
- Von Guerard Stream
Original Type Description
| Author: | Hohn and Hellerman 1963 |
|---|---|
| Length: | 13.5 ? 15.1 µm |
| Width: | 5.7 ? 6.2 µm |
| Striae: | 28-32 in 10 µm |
Original Description:
Valva elliptic, sides nearly parallel; striae radiate throughout, straight, non-punctate, 28/32/10 µm at ends, slightly coarser at center; central area transversely rectangular; rapheless valve: axial area narrow at ends expanding toward center to form ovoid rectangular area; length 13.5-15.1 µm, width 5.7-6.2 µm. Type locality: La Vase River, Canada
New combination
| Author: | Lange-Bertalot, H. 1999 |
|---|
Citations
Index Nominum Algarum (INA):
- 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):
- Hohn and Hellerman 1963. p. 273-74, Pl. 2, fig. 1,2 [citation 47(15)]
- Krammer and Lange-Bertalot 1991. p. 20-21, Pl. 12, fig. 21-31. [citation 74(54)]
- Lange-Bertalot 1999. Icon. Diatom. 6:276-289 [citation 127(115)]
