Platessa hustedtii
-
Category
-
Length Range11-15 µm
-
Width Range5.0-6.4 µm
-
Striae in 10 µm15-18
-
SynonymsAchnanthes hustedtii (Krasske) Reimer in R.M.Patrick and Reimer
-
Reported AsAchnanthes rupestoides (Hohn)
-
ContributorMarina Potapova - Oct 2011
-
ReviewerSarah Spaulding - Oct 2011
Identification
Description
Valves are elliptical. The raphe valve has a narrow axial area and a transversely elliptical or rectangular central area. The rapheless valve has a wide lanceolate axial area and no distinct central area. The raphe is straight, with slightly expanded terminal and central ends, and lacks terminal fissures. Striae are radiate and biseriate. The external and internal openings of the areolae are circular or somewhat angular and isodiametric.
Autecology
-
Size Range, µm3
-
Motility
-
Attachment
-
Habitat
-
Colony
-
Waterbody
-
Distribution
- Learn more about this
Original Description
Cocconeis Hustedtii nov. spec. -(Fig. 10a, b). - Elliptisch, Oberschale mit kurzen, leicht strahlenden Streifen, 18 - 20 in 10µ, die eine breit lanzettliche Pseudoraphe von etwa einem Drittel der Schalenbreite freilassen. Unterschale: enge Axial-Area und breite quadratische Zentralarea, Streifen etwas enger, 19 - 22 in 10µ. Länge 12 - 17 µ, Breite 5 - 7 µ.- Fundort : Wand eines Schulaquariums,hier trotz öfterer Reinigung stets in Massen. Doch auch in Aquarien des Herrn LOUIS SCHLUZE Cassel beobachtet.
-
BasionymCocconeis hustedtii
-
AuthorKrasske 1923
-
Length Range12-17 µm
-
Width5-7 µm
-
Striae in 10µm19-22 on raphe valve, 18-20 on rapheless valve
Original Images
Citations & Links
Citations
Links
-
North American Diatom Ecological DatabaseNADED ID: 2508004
Cite This Page
Potapova, M. (2011). Platessa hustedtii. In Diatoms of North America. Retrieved December 26, 2024, from https://diatoms.org/species/46642/platessa_hustedtii
Responses
The 15 response plots show an environmental variable (x axis) against the relative abundance (y axis) of Platessa hustedtii 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.
Platessa hustedtii
- Valves elliptic
- Axial area on raphe valve narrow
- Raphe valve with transversely elliptic or rectangular central area
- Rapheless valve with wide lanceolate axial area
- Both valves with stria density 15-18 in 10 µm
Valves are elliptic. The raphe valve has a narrow axial area and a transversely elliptic or rectangular central area. The rapheless valve has a wide lanceolate axial area and lacks a distinct central area.