Compare Halamphora subtilis
Amphora bicapitata, Halamphora normanii, and H. latecostata are larger in size. Halamphora tenerrima is similar in size and shape, but has finer striae (up to 28 in 10 µm). Amphora tenuissima has smaller valves.
LM scalebar = 10 µm
Length Range
12.7-19.3 µm
12.7-19.3 µm
Width Range
2.7-3.5 µm
2.7-3.5 µm
Striae in 10 µm
20-25
20-25
Length Range
23.9-29 µm
23.9-29 µm
Width Range
5.2-5.5 µm
5.2-5.5 µm
Striae in 10 µm
20-22 off-center on the dorsal side, 22-23 off-center on ventral side
20-22 off-center on the dorsal side, 22-23 off-center on ventral side
Length Range
20-30 µm
20-30 µm
Width Range
4.3-5 µm
4.3-5 µm
Striae in 10 µm
18-20
18-20
Length Range
16-50 µm
16-50 µm
Width Range
4.1-7.9 µm
4.1-7.9 µm
Striae in 10 µm
9-13 at dorsal center; 15-18 at dorsal apices; 19-20 ventral
9-13 at dorsal center; 15-18 at dorsal apices; 19-20 ventral
