Luticola arctica | Species - Diatoms of North America

Category

Symmetric Biraphid
Length Range

9-27 µm
Width Range

5.5-7.3 µm
Striae in 10 µm

15-18

Contributor

Marina Potapova - Jul 2019
Reviewer

Bart Van de Vijver - Aug 2019

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Identification

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Description

Valves are linear-lanceolate, with slightly protracted, rounded apices. The axial area is narrow and linear. The central area is transapically rectangular to bow-tie-shaped. A stigma is located mid-way between the valve center and the margin. Striae are coarsely punctate, with 4-5 areolae per stria. Striae are moderately radiate near the valve center, to strongly radiate near the apices.

Autecology

Luticola arctica was described from Franz Josef Land, a Russian archipelago. The images shown on this page are from an Alaskan river; this taxon is known only from the Arctic.

Size Range, µm3

101-1000
Motility

Moderately motile
Attachment

Unattached
Habitat

Soils Moist habitats Benthic
Colony

Solitary
Occurrence

Rare
Waterbody

Inland
Learn more about this

Original Description

12. Luticola arctica Levkov & Metzeltin sp. nov. (Figs 7: 1-25)

Valves linear to linear-lanceolate with convex valve margins. Valve apices protracted, rounded to truncate. Valve length 13.5-40.5 µm, valve width 6.0-8.5 µm. Axial area narrow, linear, slightly wider at central area. Central area wide, asymmetrical, rectangular to bow-tie-shaped stauros, bordered on each margin by a single row of areolae. Single, isolated, stigma in central area, located almost halfway between the valve center and margin. Proximal raphe endings deflected to side opposite stigma. Distal raphe fissures hook-shaped, extending onto valve mantle. Transapical striae with 4-5 round to slightly elongated areolae. Areolae close to valve margin larger. Transapical striae coarse, punctate, moderately radiate near mid-valve, becoming strongly radiate near apices, 12-15 in 10 µm.

Author

Levkov and Metzeltin 2013
Length Range

13.5-40.5 µm
Width

6.0-8.5 µm
Striae in 10µm

15-21

Original Images

Citations & Links

Citations

Levkov, Z., Metzeltin, D. and Pavlov, A. (2013) Luticola and Luticopsis In: Diatoms of Europe, Diatoms of the European Inland Waters and Comparable Habitats, Volume 7, Koeltz Scientific Books, pp. 698.

Cite This Page

Potapova, M. (2019). Luticola arctica. In Diatoms of North America. Retrieved December 16, 2024, from https://diatoms.org/species/95552/luticola-arctica

Responses

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