Diatoms of North AmericaDiatoms of North America
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Compare Sellaphora schadei

(Krasske) C.E.Wetzel, Ector, Van de Vijver, Compère and D.G.Mann 2015

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Sellaphora pulchra has a higher stria density.

Sellaphora javanica is larger, more elongate, and has a broader central area.

Sellaphora japonica has rostrate apices in the size range.

Sellaphora digna is similar in valve outline, but has a larger size range and nearly rectangular central area.

Sellaphora glomus was transferred from Navicula (Gluschenko et al. 2023) and is also shown in Krammer and Lange-Bertalot (1989, Fig. 71, 39) and is stated to have a greater stria density (30-32 striae in 10 µm).

LM scalebar = 10 µm
Sellaphora schadei LM1 Sellaphora schadei LM2 Sellaphora schadei LM3 Sellaphora schadei LM4 Sellaphora schadei LM5 Sellaphora schadei LM6 Sellaphora schadei LM7
Length Range
10.5-14.1 µm
Width Range
4.8-5.6 µm
Striae in 10 µm
24-28

Sellaphora javanica

Wetzel 2015

Sellaphora javanica LM5 Sellaphora javanica LM1 Sellaphora javanica LM2 Sellaphora javanica LM3 Sellaphora javanica LM4
Length Range
15-19 µm
Width Range
4.3-5.5 µm
Striae in 10 µm
19-24

Sellaphora pulchra

Enache and Potapova 2009

Sellaphora pulchra LM2 Sellaphora pulchra LM5 Sellaphora pulchra LM4 Sellaphora pulchra LM7 Sellaphora pulchra LM6 Sellaphora pulchra LM1 Sellaphora pulchra LM3
Length Range
7.6-13.3 µm
Width Range
3.3-4.0 µm
Striae in 10 µm
30-40 around central area, 35-45 from mid-valve to apices

Sellaphora japonica

(H.Kobayasi) H.Kobayasi in Mayama and Kawashima 1998

Sellaphora japonica LM4 Sellaphora japonica LM6 Sellaphora japonica LM2 Sellaphora japonica LM7 Sellaphora japonica LM3 Sellaphora japonica LM1 Sellaphora japonica LM5
Length Range
13-24.5 µm
Width Range
5.4-6.1 µm
Striae in 10 µm
24-26 at mid-valve, 28 at the ends

Also compare to

Sellaphora digna

(Hust.) Wetzel

Sellaphora glomus

(Carter and Bailey-Watts) Glushchenko and Kulikovskiy