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Sellaphora meridionalis is elliptical in shape, especially as compared to S. pupula, which has more broadly rounded apices. Sellaphora rexii possesses grooves and conopea, while they are absent in S. meridionalis.

LM scalebar = 10 µm
Sellaphora meridionalis LM4 Sellaphora meridionalis LM3 Sellaphora meridionalis LM5 Sellaphora meridionalis LM7 Sellaphora meridionalis LM6 Sellaphora meridionalis LM1 Sellaphora meridionalis LM2
Length Range
18-32 µm
Width Range
6.8–7.8 µm
Striae in 10 µm
22–23

Sellaphora rexii

Potapova and Ponader 2008

Gs003341  Rexii S12 Holo2B Real Gsn95461 S8 Gs003341  Rexii Holo3B Gs003341  Rexii  S7C Gs003341  Rexii  S5B
Length Range
22-33 µm
Width Range
7.1-8.6 µm
Striae in 10 µm
20-24

Also compare to

Sellaphora pupula

(Kütz.) Mereschk.