Diatoms of North AmericaDiatoms of North America

Chamaepinnularia krasskei

Lange-Bertalot 1999

Chamaepinnularia krasske guide
  • Category
    Symmetric Biraphid
  • Length Range
    8.7-16.7 µm
  • Width Range
    2.6-3.2 µm
  • Striae in 10 µm
    22-24

Identification

Chamaepinnularia krasskei LM6 Chamaepinnularia krasskei LM4 Chamaepinnularia krasskei LM5 Chamaepinnularia krasskei LM3 Chamaepinnularia krasskei LM7 Chamaepinnularia krasskei LM2 Chamaepinnularia krasskei LM1
View image metadata
Chamaepinnularia krasskei SEM2 Chamaepinnularia krasskei SEM1

Description

Valves are linear to linear-lanceolate and may often be subtly triundulate, with subrostrate rounded apices. The raphe is straight and filiform. The axial area is linear and narrow. The central area is elliptic and apically elongated. Striae are composed of a single areola, slightly radiate in the valve center, becoming parallel or slightly convergent toward the ends.

Autecology

This taxon was described from Siberia. Specimens shown here are from Alaska.

Original Description

Valvae lineares marginibus interdum minime undulatis apparentibus apicibus late rotundatis non vel parum protractis (attenuatis) sed numquam capitatis. Longitudo 15-27 µm, latitudo 3.3-4 µm. Raphe filiformis recta extremis centralibus terminalibusque inconspicuis tamen poris centralibus conspicue distantibus sitis inter se. Area axialis in partibus distalibus angusta ad mediam versus distincte dilatata. Area centralis satis lata rhombico-lanceolata ad instar. Striae transapicales modice radiantes sub apices distincte convergentes, 21-23 in 10 µm. In microscopo electronico: signa typica (particulariter alveoli simplices) generis Chamaepinnularia adsunt.

  • Author
    Lange-Bert. 1999
  • Length Range
    15-27 µm
  • Width
    3.3-4 µm
  • Striae in 10µm
    21-23

Original Images

Chamaepinnularia krasskei orig illus
Chamaepinnularia krasskei orig desc

Citations & Links

Citations

Links

  • Index Nominum Algarum
  • DiatomBase
    Link
  • The Academy of Natural Sciences, Drexel University
    Link

Cite This Page

Leppik, S., Potapova, M. (2024). Chamaepinnularia krasskei. In Diatoms of North America. Retrieved November 13, 2024, from https://diatoms.org/species/chamaepinnularia-krasskei

Responses

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