Nupela elegantula | Species - Diatoms of North America

Category

Symmetric Biraphid
Length Range

12-26 µm
Width Range

3.1-4.0 µm
Striae in 10 µm

34-38

Contributor

Marina Potapova - Oct 2010
Reviewer

Sarah Spaulding - Nov 2010

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Identification

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Description

Valves are linear-lanceolate, with broadly subrostrate ends. Striae are slightly radiate throughout the valve, parallel or slightly convergent at the apices. There are 3-4 areolae in each stria on the valve face and one areola on the mantle. Raphe is absent on one of the valves. The raphe valve has rhombic-lanceolate axial area and round central area. The rapheless valve has rhombic-lanceolate axial area, but no distinct central area. The raphe has double-curved external slit and straight internal slit. External proximal raphe ends are moderately expanded, while internal proximal raphe slits are T-shaped. Terminal raphe fissures are sharply deflected towards secondary side of the valve.

Autecology

Size Range, µm3

11-100
Motility

Slightly motile
Attachment

Unattached
Habitat

Benthic
Colony

Solitary
Waterbody

Inland
Distribution

California coastal rivers 2017
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Original Description

Valves linear-lanceolate 3.1–4.0μm wide,12–26μm long with broadly subrostrate ends. Striae slightly radiate throughout the valve, parallel or slightly convergent at the apices, 34–38 in 10μm. There are 3– 4 areolae in each stria on the valve face and one areola on the mantle. Raphe absent on one of the valves. Raphe valve with rhombic-lanceolate axial area and round central area. Rapheless valve with rhombic-lanceolate axial area, but without distinct central area. Raphe with double-curved external slit and straight internal slit. External proximal raphe ends moderately expanded, internal proximal raphe slits T-shaped. Terminal raphe fissures sharply deflected towards secondary side of the valve.

Author

Potapova 2011
Length Range

12-26 µm
Width

3.1-4 µm
Striae in 10µm

34-38

Original Images

Citations & Links

Citations

Potapova, M. (2011) New species and combinations in the genus Nupela from the USA Diatom Research

Publication Link: 10.1080/0269249X.2011.575111

Cite This Page

Potapova, M. (2010). Nupela elegantula. In Diatoms of North America. Retrieved December 26, 2024, from https://diatoms.org/species/44891/nupela_elegantula

Responses

The 15 response plots show an environmental variable (x axis) against the relative abundance (y axis) of Nupela elegantula 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.