Diatoms of North AmericaDiatoms of North America
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Compare Platessa conspicua

(A.Mayer) Lange-Bert. in Krammer and Lange-Bert. 2004

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Platessa bahlsii has a very small central area on the raphe valve, smaller average size, and by having three or four rows of areolae in the striae. Platessa conspicua may also be confused with small specimens of various Planothidium species, which also possess relatively broad striae. It can be distinguished by its linear-elliptical valve outline, absence of terminal raphe fissures, and transverse central area on the raphe valve.

LM scalebar = 10 µm
Gsn82684 Pl Consp 8Ed Gsn82684 Pl Consp 9Ed Gsn82684 Pl Consp 4Ed Gsn82684 Pl Consp 3B Ed Gsn82684 Pl Consp 2Ed Gsn82684 Pl Consp 1Ed Gsn82684 Pl Consp 5Ed
Length Range
7.0-17.5 µm
Width Range
3.6-5.4 µm
Striae in 10 µm
12-16

Platessa bahlsii

Potapova 2012

Platessa bahlsii LM4 Platessa bahlsii LM6 Platessa bahlsii LM3 Platessa bahlsii LM7 Platessa bahlsii LM2 Platessa bahlsii LM1 Platessa bahlsii LM5
Length Range
3.6– 11.0 µm
Width Range
2.9–4.2 µm
Striae in 10 µm
12–15