Navicula lanceolata
-
Category
-
Length Range30-60 µm
-
Width Range9–12 µm
-
Striae in 10 µm10–13
-
ContributorMarina Potapova - May 2009
-
ReviewerSam Rushforth - May 2010
Identification
Description
Valves are lanceolate, with rounded ends, 9-12 µm wide, 30-60 µm long. The raphe is filiform, with the central portions of the branches and central raphe endings slightly deflected towards the primary side of the valve. Terminal raphe fissures are hooked towards the secondary side. The axial area is narrow, linear. The central area is rounded rectangular or square. Striae are radiate, but convergent at the valve apices, 10-13 in 10 µm. Areolae ~32 in 10 µm.
Autecology
This taxon is found in both fresh and brackish water. It is tolerant of high concentrations of nutrients.
-
Size Range, µm3
-
Motility
-
Attachment
-
Habitat
-
Colony
-
BCG
-
Waterbody
-
Distribution
- Learn more about this
Original Description
Frustulia lanceolata, strato luteo-fusco submucoso e frustulis lanceolatis angustis obtusiusculis uniformiter coloratis constituto. In ostio thermarum ad Carlsbad, demersa ubi aqua adhuc calida (25 R.)
-
BasionymFrustulia lanceolata
-
AuthorC.Agardh 1827
Original Images
Citations & Links
Citations
Links
-
Index Nominum Algarum
-
GenBank
-
North American Diatom Ecological DatabaseNADED ID: 46859
Cite This Page
Potapova, M. (2009). Navicula lanceolata. In Diatoms of North America. Retrieved December 21, 2024, from https://diatoms.org/species/44499/navicula_lanceolata
Responses
The 15 response plots show an environmental variable (x axis) against the relative abundance (y axis) of Navicula lanceolata 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.
Navicula lanceolata
- Valve margin lanceolate, broad in the central valve and slightly rostrate, rounded ends
- Central area an irregular oval
- Striae radiate, except at the ends where they become convergent
Valves lanceolate with rounded ends. Striae radiate through most of the valve, becoming convergent at the ends. Central area is a somewhat rounded rectangle, or it may be square or irregular (asymmetric). The proximal raphe ends are are rather distantly placed from one another.