Images
Click any image to enlarge...
LM image scalebar = 10 µm = 72 pixels
SEM image scalebar = 5 µm
Observations
| Observations: | Sarah Spaulding and Rhea Esposito |
|---|---|
| Length: | 25-38 µm |
| Width: | 7-10 µm |
| Striae: | 11-13 in 10 µm on the pseudoraphe valve; 13-16 in 10 µm on the raphe valve |
Description:
Valve outline linear elliptical with rounded ends. Raphe valve: Narrow axial area, except at the central area where a slight thickening of silica occurs. Raphe straight to slightly arching. Striae radiate throughout. Pseudoraphe valve: Linear axial area, strongly displaced towards one margin. Pseudoraphe valves possess a distinct thickened nodule near each distal pole, which may be a porefield. Striae parallel in the center, becoming radiate towards the poles.
| Morphology: | Monoraphid |
|---|---|
| Distribution: | Antarctic endemic |
Autecology:
Notes:
Kellogg et al. (1980) described Achnanthes taylorensis from the McMurdo Dry Valleys. Previous researchers identified A. brevipes var. intermedia from this region (West and West, 1911; Ko-Bayashi, 1963; Baker, 1967; Brady, 1977; Seaburg et al., 1979). Compared with A. brevipes var. intermedia, finer striae, lack of a central constriction, and absence of produced poles distinguish A. taylorensis as a unique species. Because of these characteristics, A. taylorensis appears to more closely resemble A. coarctata than A. brevipes var. intermedia.
McMurdo Dry Valleys Waterbodies with Achnanthes taylorensis
- Adams Stream
- Aiken Creek
- Blue Lake
- Bowles Creek
- Canada Stream
- Coast Lake
- Commonwealth Stream
- Crescent Stream
- Delta Stream
- Green Creek
- Green Lake
- Harnish Creek
- Harnish Creek Tributary
- Lost Seal Stream
- McKay Creek
- Miers Stream
- Onyx River
- Picture Pond
- Pond by Blue Lake
- Pond by Clear Lake
- Pony Lake
- Priscu Stream
- Spaulding Pond
- Von Guerard Stream
- Wales Stream
- Wharton Creek
- Wormherder Creek
Original Type Description
| Author: | Kellogg et al. 1980 |
|---|---|
| Length: | 31-33 µm |
| Width: | 8.8-9.3 µm |
| Striae: | 12 in 10 µm |
Original Description:
Achnanthes, not A. brevipes var. intermedia; similar to A. coarctata; valves linear-elliptical with rounded poles; axial area of raphe valve extremely narrow; central area broad and stauroneiform; striae punctate, about 12 radiate striae in 10 µm on the raphe valve, about 13 curving striae in 10 µm on the rapheless valve. Length 31-33 µm; width 8.8-9.3 µm. Kellogg et al. comment that this taxon was originally noted from moraines on Cape Royds and from Clear Lake (Ross Island) (West & West, 1911) as A. brevipes var. intermedia. Holotype: C14-76-1 ANSP Locality: delta along Delta Stream 19.6 m asl
New combination
| Author: |
|---|
Citations
Index Nominum Algarum (INA):
- Original
- 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):
- West and West 1911. figs 126-127. [citation 124(127)]
- Ko-Bayashi 1963. p. 5-6, Pl. 1-3 [citation 66(38)]
- Baker 1967. p. 463, fig. 4e. [citation 3(128)]
- Kellogg et al. 1980. p. 174, Pl. 2, fig. 1-2. [citation 64(36)]
- Sabbe et al. 2003. p. 242, figs 1,2,74,75. [citation 135(126)]
