Credit: Jaime Haueter
Caloneis amphisbaena live cell in valve view and girdle view.
Caloneis amphisbaena
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Category
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Length Range58.6-77.0 µm
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Width Range21.3-26.4 µm
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Striae in 10 µm15-17
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ContributorJaime Zebill Haueter - Jun 2014
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ReviewerSarah Spaulding - Aug 2014
Identification
Description
Valves are elliptical to elliptical lanceolate, with capitate apices. The axial area is broad and expanded to form a large lanceolate rhombic central area. The central area is slightly asymmetric from one side of the axial area to the other. The raphe is straight and centrally located. Proximal raphe ends are slightly expanded. Distal raphe ends are curved in the same direction. Striae radiate throughout most of the valve, becoming parallel to convergent at the ends. Two longitudinal lines are present along each side of the raphe, dividing the striae approximately into thirds.
Note that Patrick and Reimer (1966) report a greater range in length (36-80 µm) and breadth (20-30 µm).
Autecology
Caloneis amphisbaena was found in epipelon samples from the Little Sioux River, Dickinson County, Iowa. Other specimens were found in epiphytic samples from Dugout Creek, Dickinson County, Iowa.
Mann (1989) stated that Caloneis amphisbaena in Blackford Pond appeared to be asexual, as no cells were observed to pair and form auxospores.
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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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BCG
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Waterbody
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Distribution
- Learn more about this
Credit: Jaime Haueter
Caloneis amphisbaena live cell in valve view showing chloroplast structure.
Credit: Jaime Haueter
Caloneis amphisbaena live cell in valve view showing chloroplast structure.
Credit: Viviana Mazzei
Sampling Caloneis amphisbaena from epipelon of Little Sioux River, Dickinson County IA
Original Description
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BasionymNavicula amphisbaena
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AuthorBory 1824
Original Images
Citations & Links
Citations
Links
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Index Nominum Algarum
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GenBank
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North American Diatom Ecological DatabaseNADED ID: 12023
Cite This Page
Haueter, J. (2014). Caloneis amphisbaena. In Diatoms of North America. Retrieved December 16, 2024, from https://diatoms.org/species/50057/caloneis_amphisbaena
Responses
The 15 response plots show an environmental variable (x axis) against the relative abundance (y axis) of Caloneis amphisbaena 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.
Caloneis amphisbaena
- Apices capitate
- Expanded central area
- Longitudinal lines present
Valves are large with capitate apices. The central area is greatly expanded and lanceolate rhombic in shape. The raphe is straight with expanded proximal ends. Striae are radiate throughout most of valve, becoming parallel to convergent at the apices. Two distinct longitudinal lines are present.