Planothidium potapovae | Species - Diatoms of North America

Category

Monoraphid
Length Range

11.0-17.5 µm
Width Range

5.0-6.0 µm
Striae in 10 µm

11-13

Reported As

Planothidium rostratum (See UPDATES, below)

Contributor

Marina Potapova - Dec 2010
Reviewer

Sarah Spaulding - Aug 2013

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Identification

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Description

Valves are lanceolate to elliptic-lanceolate with rostrate to subcapitate apices. The raphe valve has a linear axial area and transversely rectangular central area. The rapheless valve has a linear-lanceolate axial area, which widens considerably in the valve center. The central area on the rapheless valve contains a cavum on the internal valve surface. The raphe is straight with expanded external proximal endings. Terminal raphe fissures are curved to the secondary side of the valve. The striae are multiseriate and radiate throughout both valves.

Autecology

Size Range, µm3

101-1000
Motility

Slightly motile
Attachment

Prostrate
Habitat

Benthic
Colony

Solitary
BCG

BCG 3
Waterbody

Inland Rivers
Distribution

Western rivers 2004 Southeast rivers 2014 California coastal rivers 2017
Learn more about this

Original Description

Author

C.E.Wetzel & Etor 2019
Length Range

11.5-14.5 µm
Width

5-6 µm
Striae in 10µm

12-14

Original Images

Citations & Links

Citations

Updates

Mar 18, 2020 - Revision of Planothidium rostratum

From December 2010 to March 2020, this page appeared as Planothidium rostratum. Wetzel et al. (2019) proposed a more narrow concept of this taxon. This page was revised to reflect the recognition of Planothidium potapovae from P. rostratum sensu lato. - M. Potapova

Cite This Page

Potapova, M. (2010). Planothidium potapovae. In Diatoms of North America. Retrieved December 21, 2024, from https://diatoms.org/species/45121/planothidium_potopovae

Responses

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