Psammothidium acidoclinatum
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Category
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Length Range8-16 µm
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Width Range4.4-5.8 µm
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Striae in 10 µm23-27
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ContributorMarina Potapova - Aug 2010
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ReviewerSarah Spaulding - Aug 2010
Identification
Description
Valves are elliptic-lanceolate to linear-elliptic. The raphe valve has a linear axial area, which widens toward the center of the valve, and a transversely elliptic central area. The raphe is straight, without terminal fissures. The central and terminal raphe ends are simple. The central raphe ends curve toward opposite sides internally. The rapheless valve has a wide rhomboid-lanceolate axial area. The central area is usually not differentiated from the axial area. Striae are radiate on both valves, 23-27 in 10 µm. One row of areolae is present on the mantle of both valves. The external openings of the areolae are small, circular.
Autecology
Common in soft acidic waters.
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Size Range, µm3
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Motility
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Attachment
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Habitat
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Colony
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Occurrence
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Waterbody
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Distribution
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Original Description
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BasionymAchnanthes acidoclinata
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AuthorLange-Bert. in Lange-Bert. and Metzeltin 1996
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Length Range8-14(16) µm
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Width4-7 µm
Original Images
Citations & Links
Citations
Links
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Index Nominum Algarum
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North American Diatom Ecological DatabaseNADED ID: 186005
Updates
Mar 28, 2018 - Change in name
From August 2010 until March 2018, this taxon appeared under the name Psammothidium marginulatum. It was updated to conform to Lange-Bertalot and Metzeltin (1996). - M. Potapova
Cite This Page
Potapova, M. (2010). Psammothidium acidoclinatum. In Diatoms of North America. Retrieved December 26, 2024, from https://diatoms.org/species/44730/psammothidium_acidoclinatum
Responses
The 15 response plots show an environmental variable (x axis) against the relative abundance (y axis) of Psammothidium acidoclinatum from all the stream reaches where it was present. Note that the relative abundance scale is the same on each plot. Explanation of each environmental variable and units are as follows:
ELEVATION = stream reach elevation (meters)
STRAHLER = distribution plot of the Strahler Stream Order
SLOPE = stream reach gradient (degrees)
W1_HALL = an index that is a measure of streamside (riparian) human activity that ranges from 0 - 10, with a value of 0 indicating of minimal disturbance to a value of 10 indicating severe disturbance.
PHSTVL = pH measured in a sealed syringe sample (pH units)
log_COND = log concentration of specific conductivity (µS/cm)
log_PTL = log concentration of total phosphorus (µg/L)
log_NO3 = log concentration of nitrate (µeq/L)
log_DOC = log concentration of dissolved organic carbon (mg/L)
log_SIO2 = log concentration of silicon (mg/L)
log_NA = log concentration of sodium (µeq/L)
log_HCO3 = log concentration of the bicarbonate ion (µeq/L)
EMBED = percent of the stream substrate that is embedded by sand and fine sediment
log_TURBIDITY = log of turbidity, a measure of cloudiness of water, in nephelometric turbidity units (NTU).
DISTOT = an index of total human disturbance in the watershed that ranges from 1 - 100, with a value of 0 indicating of minimal disturbance to a value of 100 indicating severe disturbance.
Psammothidium acidoclinatum
- Valves elliptic-lanceolate to linear-elliptic
- Raphe valve with transversely elliptic central area
- Rapheless valve with wide rhomboid-lanceolate axial area
Valves are elliptic-lanceolate to linear-elliptic. The raphe valve has a linear axial area, which widens toward the center of the valve, and a transversely elliptic central area. The raphe is straight, without terminal fissures. The rapheless valve has a wide rhomboid-lanceolate axial area. Striae are radiate on both valves, 23-27 in 10...