Compare

Planothidium apiculatum is very similar in size and shape and may be difficult to distinguish, especially the rapheless valves. The raphe valve has a rhomboid central area.

LM scalebar = 10 µm
Planothidium lanceolatoide LM1 Planothidium lanceolatoide LM2 Planothidium lanceolatoide LM4 Planothidium lanceolatoide LM3 Planothidium lanceolatoide LM7 Planothidium lanceolatoide LM6 Planothidium lanceolatoide LM5
Length Range
17-36 µm
Width Range
9-13 µm
Striae in 10 µm
11-14

Planothidium apiculatum

(R.M.Patrick) Lange-Bert. 1999

Planothidium apiculatum LM3 Planothidium apiculatum LM1 Planothidium apiculatum LM4 Planothidium apiculatum LM6 Planothidium apiculatum LM2 Planothidium apiculatum LM5 Planothidium apiculatum LM7
Length Range
25-31 µm
Width Range
9.0-12.7 µm
Striae in 10 µm
10-12

Diatoms of North America is running a fundraising campaign to keep the servers in operation. We need you to reach our $25,000 fundraising goal.

If you use and appreciate DONA, make your DONAtion today.

For the Gift Designation, type "diatom" in the search box and select "Diatom Lab Research Fund". This is the designated fund for diatoms.org.