• Category
  • Diameter
    12-34 µm
  • Striae in 10 µm
    11-13
  • Reported As
    Cyclotella intermedia (Houk et al. 2010 (invalid))
    Lindavia intermedia (Nakov et al. 2015 (invalid))

Identification

Description

Valves are disc-shaped and concentrically undulate, with both concave and convex centers. The valve is divided into two distinct parts, with the central part roughly 1/3 of the total diameter. Striae are alveolate and multiseriate, with 3-4 rows of fine porelli which are not readily seen in LM. Porelli spacing within rows is 45-50 in 10 µm. The striae are of mostly the same length, but are variably interrupted by short stria that give the appearance of branching costae near the margin. Isolated rimoportulae with simple external openings are observed at the central ends of 2 or 3 shortened striae. These rimoportulae are sometimes evenly spaced around the diatom and sometimes not. Internally, the rimoportulae are long, thin, and oriented oblique or perpendicular to the striae. The central area contains areolae and fultoportulae of varying size that are arranged randomly, to somewhat radially. Under SEM, the areolae are internally covered by cribra while the fultoportulae are bordered by 3 satellite pores. There may be a thin hyaline area (annulus) isolating the central-most areolae. Marginal fultoportulae are evenly spaced and located at the marginal ends of the costae.

Note that the combination and elevation in rank to species published in Houk et al. (2010), Cyclotella intermedia (Manguin) Houk, was invalid because it did not refer to the validating description of the species (Kociolek and Reviers 1996).

For a similar reason, the combination and elevation in rank to species published in Nakov et al. (2015) Lindavia intermedia (Manguin) Nakov et al., was invalid because because it did not provide a full and direct citation of the basionym by Kociolek and Reviers (1996) that validated the name (see ICN Art. 6.10, Art. 41.5).

Autecology

Manguin’s original description is based on plankton samples from Lake Karluk, an oligotrophic lake on Kodiak Island, Alaska. It has also been found in surface sediments of Toolik Lake in northern Alaska and possibly in oligotrophic alpine lakes in Germany and Austria.

Toolik Lake
Credit: http://ecosystems.mbl.edu/ARC/
Toolik Lake is an oligotrophic lake in a tundra landscape. Lindavia intermedia was found in the surface sediments at 8 m depth.

Original Description

Diametre 23 µ. Zone marginale avec 11 stries en 10 µ, finement lignées, 2 a 3 points isolés (flamettes) en 10 µ; Zone intermédiaire parcourue par des rangés irrégulieres de ponctuations. Zone centrale courverte de ponctuations éparses.

  • Basionym
    Cyclotella bodanica var. intermedia
  • Author
    Manguin ex Kociolek and Reviers 1996
  • Length Range
    23 µm
  • Striae in 10µm
    11

Original Images

Cyclotella bodanica var. Intermedia orig desc
Cyclotella bodanica var. intermedia orig illus
Cyclotella bodanica var. intermedia orig illus

Updates

Nov 22, 2016 - Correction of authorship according to Daniels et al. (2016)

Corrected authorship on this website from Lindavia intermedia (Manguin ex Kociolek and Reviers) T. Nakov et al. 2015 to Lindavia intermedia (Manguin ex Kociolek and Reviers) Nakov et al. ex W.C.Daniels, Novis & Edlund 2016.

The combination and elevation in rank to species published in Nakov et al. (2015) Lindavia intermedia (Manguin) Nakov et al., was invalid because because it did not provide a full and direct citation of the basionym by Kociolek and Reviers (1996) that validated the name (see ICN Art. 6.10, Art. 41.5). - S. Spaulding

Jul 21, 2018 - Transferred from C. bodanica var. intermedia

Transferred on this website from C. bodanica var. intermedia to L. intermedia, following Nakov et al. (2015). - S. Spaulding

Cite This Page

Daniels, W. (2012). Lindavia intermedia. In Diatoms of North America. Retrieved July 21, 2018, from https://diatoms.org/species/lindavia_intermedia

Responses

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