Halamphora montana is distinguished from H. normanii, H. pseudomontana, and H. submontana by its small size, fine striation, narrow axial area.

LM scalebar = 10 µm
Halamphora montana LM1 Halamphora montana LM4 Halamphora montana LM5 Halamphora montana LM3 Halamphora montana LM6 Halamphora montana LM2
Length Range
12-20 µm
Width Range
3-4.5 µm
Striae in 10 µm
Difficult to resolve in LM

Halamphora normanii

(Rabenh.) Levkov 2009

Halamphora normanii LM1 Halamphora normanii LM3 Halamphora normanii LM4 Halamphora normanii LM5 Halamphora normanii LM2
Length Range
20-30 µm
Width Range
4.3-5 µm
Striae in 10 µm

Also compare to

Halamphora submontana

BioData Reference
Levkov 2009 Pl 93 Fig 20-22

Halamphora pseudomontana

(Cholnoky) Levkov