Diatoms of North AmericaDiatoms of North America
Return to overview

Compare Sellaphora americana

(Ehrenb.) D.G.Mann 1989

Compare

Sellaphora alastos has narrow conopea and a transversely rectangular central area. The central striae of S. alastos are more widely spaced than the distal striae.

LM scalebar = 10 µm
Sellaphora americana LM5 Sellaphora americana LM4 Sellaphora americana LM8 Sellaphora americana LM7 Sellaphora americana LM6 Sellaphora americana LM3 Sellaphora americana LM9
Length Range
58.3-93.4 µm
Width Range
14.6-19.1 µm
Striae in 10 µm
16-18 midway between valve center and apex

Sellaphora alastos

(M.H.Hohn and Hellerman) Lange-Bert. and Metzeltin 1996

Sellaphora alastos LM1 Sellaphora alastos LM2 Sellaphora alastos LM3 Sellaphora alastos LM4 Sellaphora alastos LM5 Sellaphora alastos LM6 Sellaphora alastos LM7
Length Range
41.0-82.0 µm
Width Range
11.0-17.0 µm
Striae in 10 µm
17-19 midway between valve center and apex