• Category
  • Length Range
    20-35 µm
  • Width Range
    7.2-9.3 µm
  • Striae in 10 µm
    22-24

Identification

Description

Valves are elliptical-lanceolate with rostrate to subcapitate apices. Pseudosepta are present at the ends. The axial area is narrow and linear. A distinctive stauros is present, forming the shape of an "X". The raphe is straight and the proximal external ends are turned to the primary side. Striae are radiate. Areolae are small, circular and number approximately 40 in 10 μm.

Autecology

Original Description

Schizostauron Crucicula GRUN. Striæ oblique, fine, 25 in 0,01 mm. Stauros bifid with very divergent branches, reaching the margins. Length 0,03mm. Breadth 0,009 mm. Pl. III, fig. 44, 1000/1. Merrimac River U.St. on Chara, very rare in a gathering sent by Mr. O. NORDSTEDT. 1)

  • Basionym
    Schizostauron crucicula
  • Author
    Grunow ex Cleve 1881

Original Images

Schizostauron crucicula orig illus
Schizostauron crucicula orig descr

Cite This Page

Potapova, M. (2011). Capartogramma crucicula . In Diatoms of North America. Retrieved June 21, 2018, from https://diatoms.org/species/capartogramma_crucicula

Responses

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