Compare

Sellaphora hohnii and S. rexii have wider apices than S. californica. The valves of S. mutatoides and S. rexii are narrower and the corresponding grooves and conopea are also more narrow.

LM scalebar = 10 µm
Sellaphora californica LM1 Sellaphora californica LM3 Sellaphora californica LM2 Sellaphora californica LM5 Sellaphora californica LM4
Length Range
23-40 µm
Width Range
8-10 µm
Striae in 10 µm
20-22 in the center valve, 26-28 at the ends

Sellaphora hohnii

Potapova and Ponader 2008

Gc44484 9 Sellaphora hohnii LM1 Gc44484 1 Ss1 Gc44484 8 Ss8 Gc44484 2 Ss2
Length Range
28-47 µm
Width Range
8.9-9.8 µm
Striae in 10 µm
20-23

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 mutatoides

Lange-Bert. and Metzeltin