Credit: Loren Bahls
Medicine Grizzly Lake, Glacier National Park, Montana: type locality of Encyonopsis medicinalis.
Encyonopsis medicinalis
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Category
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Length Range14.0-21.4 µm
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Width Range4.8-5.9 µm
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Striae in 10 µm20-23 at the valve center, 22-24 near the apices
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ContributorLoren Bahls - May 2013
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ReviewerMark Edlund - Aug 2013
Identification
Description
Valves are elliptic-lanceolate and not or only weakly dorsiventral. Apices are rostrate to subcapitate. The axial area is narrow and positioned mid-valve. The central area is small and asymmetric. The raphe is filiform. Proximal raphe ends are not expanded and deflected dorsally. Distal raphe fissures are hooked toward the ventral side. Striae are weakly radiate throughout.
Autecology
Encyonopsis medicinalis is widespread and locally common in lakes in the Northern Rockies, including Glacier National Park. In these lakes it prefers alkaline water (pH = 7.9-9.1) and low concentrations of dissolved solids (specific conductance = 93-106 µS/cm).
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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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Waterbody
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Original Description
Valves elliptic-lanceolate, not or slightly dorsiventral. Apices rostrate to subcapitate. Valve length 14.0–21.4 µm; valve width 4.8–5.9 µm. Axial area narrow. Central area small, asymmetric. Raphe filiform. Proximal raphe ends not expanded, deflected dorsally. Distal raphe fissures hooked toward the ventral side. Striae radiate, 20–23 in 10 µm at valve center, 22–24 in 10 µm near the apices.
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AuthorBahls 2013
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Length Range14.0-21.4 µm
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Width4.8-5.9 µm
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Striae in 10µm20-23 at the valve center, 22-24 near the apices
Original Images
Citations & Links
Citations
Links
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Index Nominum Algarum
Cite This Page
Bahls, L. (2013). Encyonopsis medicinalis. In Diatoms of North America. Retrieved December 26, 2024, from https://diatoms.org/species/49287/encyonopsis_medicinalis
Responses
The 15 response plots show an environmental variable (x axis) against the relative abundance (y axis) of Encyonopsis medicinalis 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.
Encyonopsis medicinalis
- Valves elliptic-lanceolate
- Apices rostrate to subcapitate
- Central area small, asymmetric
- Striae 20-24 in 10 µm
Valves are elliptic-lanceolate, with rostrate to subcapitate apices. The central area is small and asymmetric. Striae number 20-24 in 10 µm.