Diatoms of North AmericaDiatoms of North America
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Compare Neidium hitchcockii

(Ehrenb.) Cleve 1894

Compare

Neidium sacoense valves are similar in length, with similar apiculate apices. However, N. sacoense lacks a conopeum-like structure and triundulate valve margins. Neidium sacoense valves are broader and the proximal raphe ends are shorter and more regularly hooked.Neidium hitchcockii var. teres lacks undulate margins.

LM scalebar = 10 µm
Neidium hitchcockii LM2 Neidium hitchcockii LM4 Neidium hitchcockii LM3 Neidium hitchcockii LM1 Neidium hitchcockii LM6 Neidium hitchcockii LM5 Neidium hitchcockii LM8
Length Range
44.9-84.7 µm
Width Range
14.4-22 µm
Striae in 10 µm
19-21

Neidium sacoense

Reimer 1966

Eusacoense Brant1182 98 7 1788 Eusaucoense Ill L 4 40 93 1684 Neidium sacoense LM1 Eusacoense Brant1047B 79 1 1433 Eusacoense Brant1047B 72 3 1310 Eusacoense Brant1182 60 5 1095 Eusacoense Brant1182 46 4 839
Length Range
46.4-98.7 µm
Width Range
18-24 µm
Striae in 10 µm
15-16

Also compare to

Neidium var. teres

Sovereign

BioData Reference
Sovereign 1963 Pg 352 Fig 12