Cavinula scutelloides
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Category
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Length Range13-24 µm
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Width Range10-15 µm
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Striae in 10 µm6-8
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ContributorMarina Potapova - Apr 2011
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ReviewerSarah Spaulding - Sep 2012
Identification
Description
Valves are elliptical. The axial area is linear; the central area is small, elliptical. The raphe is filiform with expanded external proximal ends. The terminal raphe fissures are small. The striae are strongly radiate and coarsely punctate. Long and short striae alternate in the central area. The stria density increases towards the apices. Areolae are elliptical and number 10-14 in 10 μm.
Autecology
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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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Distribution
- Learn more about this
Original Description
Navicula Scutelloides, W.Sm. Valve nearly orbicular ; striæ moniliform, 18 in •001”. Length of F. •007”. Breadth of •0006”. v.v. W. Sm. In Greg. Mic. Journ. vol. iv. P. 4. pl. i. 15. Fresh water. Ormesby, Norfolk, Sept. 1853, Mr. Bridgman. Rosthern Mere, Cheshire, Sept. 1855, Dr. Arnott. Cantyre Peat, &c.
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BasionymNavicula scutelloides
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AuthorW.Sm. 1856
Original Images
Citations & Links
Citations
Links
Cite This Page
Potapova, M. (2011). Cavinula scutelloides. In Diatoms of North America. Retrieved December 26, 2024, from https://diatoms.org/species/46529/cavinula_scutelloides
Responses
The 15 response plots show an environmental variable (x axis) against the relative abundance (y axis) of Cavinula scutelloides 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.
Cavinula scutelloides
- Valves elliptic
- Striae coarsely punctate
- Striae strongly radiate
Valves are elliptic. The central area is small and elliptic. The external proximal raphe ends are expanded. The striae are strongly radiate and coarsely punctate. Long and short striae alternate in the central area. The stria density increases towards the apices. Areolae are elliptical and number 10-14 in 10 μm.