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Diatoms of the United States is now known as Diatoms of North America.
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Platessa kingstonii

Potapova 2012      Category: Monoraphid

Platessa hustedtii


Platessa lutheri

LM scalebar = 10 µm = 80 pixels.


Contributor: Marina Potapova - January 2012
Length Range: 7-11 µm
Width Range: 4.4–5.0 µm
Striae in 10 µm: 26–30 on raphe valve, 12-15 on rapheless valve


Valves are elliptic. The raphe valve has a narrow linear axial area and a transversely rectangular central area. The raphe is filiform and straight with slightly expanded external distal and proximal ends. The internal proximal raphe ends are turned to opposite sides, while the internal distal ends have small helictoglossae. Striae are uniseriate and moderately radiate. The rapheless valve has a wide elliptic–lanceolate axial area and short triseriate striae.

Original Description

Author: Potapova 2012
Length Range: 7.4-11.0 µm
Width Range: 4.4-5.0 µm
Striae in 10 µm: 26-30 on raphe valve, 12-15 on rapheless valve

Original Description

Original Images

Cite This Page:
Potapova, M. (2012). Platessa kingstonii. In Diatoms of the United States. Retrieved May 24, 2018, from

Species: Platessa kingstonii

Contributor: Marina Potapova

Reviewer: Sarah Spaulding


Potapova, M. (2012). New species and combinations in monoraphid diatoms (Family Achnanthidiaceae) from North America. Diatom Research 27(1): 29-42. doi:10.1080/0269249X.2011.644636

Links & ID's

Index Nominum Algarum (INA)

California Academy of Sciences (CAS)

North American Diatom Ecological Database (NADED)


Autecology Discussion

So far Platessa kingstonii has been found only in two streams in north–central Pennsylvania. Conductivity in these streams ranged from 19 to 38 μ S cm−1, and pH was 6.0–6.5.