Kurtkrammeria stodderi | Species - Diatoms of North America

Category

Asymmetric Biraphid
Length Range

53-68 µm
Width Range

9.2-11.2 µm
Striae in 10 µm

9-11 at valve center, 11-13 at the ends (dorsal side)

Synonyms

Encyonopsis stodderi (Cleve) Krammer 1997
Reported As

Cymbella stodderi (Cleve sensu Hustedt in Schmidt et al. 1944, fig. 377: 1, 2)

Contributor

Loren Bahls - Jan 2014
Reviewer

Pat Kociolek - Jan 2015

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Identification

View image metadata

Description

Valves are broadly lanceolate with acutely rounded, very weakly protracted apices. The axial area is lanceolate and about one-third the valve width. The central area is absent or weakly expanded on the dorsal side. The raphe is lateral, becoming filiform at the proximal ends. Proximal raphe ends are weakly expanded and tipped towards the dorsal side. Distal raphe ends are reverse-lateral and bent towards the ventral side. Striae are radiate and become parallel then convergent at the apices. Areolae in the striae are very fine and cannot be resolved in LM.

Autecology

Kurtkrammeria stodderi was described (as Cymbella stodderi) from fossil material collected at Bemis Lake in the White Mountains of New Hampshire. In the western United States it has been collected from a fen near Missoula, Montana, from a stream in northern California, and from a pond in Mount Rainier National Park, Washington (photo below). Water quality data are not available for these sites. Cleve (1881) also reports this taxon from Sphagnum in Brazil.

Size Range, µm3

1001-10000 10001-100000
Motility

Moderately motile
Attachment

Unattached
Habitat

Benthic
Colony

Solitary
Waterbody

Inland
Learn more about this

Credit: Ryan Davis, Adventurers and Scientists for Conservation.

Berkeley Park Pond, Mount Rainier National Park, Washington: home of Kurtkrammeria stodderi.

Original Description

Basionym

Cymbella stodderi
Author

Cleve 1881
Length Range

75-90 µm
Width

15 µm
Striae in 10µm

10

Original Images

Citations & Links

Citations

Cite This Page

Bahls, L. (2014). Kurtkrammeria stodderi. In Diatoms of North America. Retrieved December 21, 2024, from https://diatoms.org/species/49634/encyonopsis_stodderi

Responses

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