Eunotia naegelii
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Category
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Length Range42-180 µm
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Width Range2.5-3.5 µm
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Striae in 10 µm14-17 in the center, 16-22 at the ends
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ContributorPaula Furey - Mar 2012
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ReviewerMarina Potapova - Apr 2012
Identification
Description
Valves moderately arched. The ventral margin is concave, while the dorsal margin is convex. Valves become progressively narrower toward the apices. Helictoglossae are located close to the apices. The apices are slightly inflated and slightly recurved toward the dorsal margin. The distal raphe end curves on to the valve face, then bends 180º and continues a short distance toward the proximal raphe ends. This raphe curvature is visible in the LM. The areolae are unresolved in the LM. Aberrations may occur in the valves, often in the form of a protuberance or bump on the ventral margin.
Original Description
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AuthorMig. 1907
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Length Range40-75 µm
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Striae in 10µm17-19
Original Images
Citations & Links
Links
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GenBank
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North American Diatom Ecological DatabaseNADED ID: 33036
Cite This Page
Furey, P. (2012). Eunotia naegelii. In Diatoms of North America. Retrieved December 16, 2024, from https://diatoms.org/species/48401/eunotia_naegelii
Responses
The 15 response plots show an environmental variable (x axis) against the relative abundance (y axis) of Eunotia naegelii 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.
Eunotia naegelii
- Valves moderately arched
- Valves narrow toward apices
- Apices slightly dorsally recurved
- Distal raphe end curves 180º
Valves moderately arched. Valves become progressively narrower toward the apices. The apices slightly recurved toward the dorsal margin. The distal raphe end curves on to the valve face, then bends 180º and continues a short distance towards the proximal raphe ends.