Diatoms of North AmericaDiatoms of North America
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Compare Psammothidium acidoclinatum

(Lange-Bert.) Lange-Bert. 1996

Compare

Psammothidium acidoclinatum differs from P. scoticum by its wider axial area on rapheless valve, elliptic-lanceolate valve shape, and lower stria density. Valves of P. altaicum are rhomboid-lanceolate with higher striae density. Psammothidium marginulatum is very similar to P. acidoclinatum, but has valves with slightly protracted apices.

LM scalebar = 10 µm
Psammothidium acidoclinatum LM5 Psammothidium acidoclinatum LM4 Psammothidium acidoclinatum LM3 Psammothidium acidoclinatum LM2 Psammothidium acidoclinatum LM1
Length Range
8-16 µm
Width Range
4.4-5.8 µm
Striae in 10 µm
23-27

Psammothidium scoticum

(Flower and Jones) Bukht. and Round 1996

Gsl00810 15A Ed Gsl00810 15B Ed Psammothidium scoticum LM2 Psammothidium scoticum LM3 Psammothidium scoticum LM2 Psammothidium scoticum LM1
Length Range
7.5-12 µm
Width Range
3.9-4.6 µm
Striae in 10 µm
27-30

Also compare to

Psammothidium altaicum

(V.S.Poretzky) Bukht. in Bukht. and Round

BioData Reference
Krammer and Lange-Bertalot 2/4 Pl 20 Fig 24-32

Psammothidium marginulatum

(Grunow) Bukht. and Round