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Psammonobiotus
Psammonobiotus

When I had found Psammonobiotus linearis, I remembered these photomicrographs which I took a year before without paying any attention to the collar. The shells are very small, 14 µm in length, which is nearly half the length of the shells of Psammonobiotus linearis. The second photomicrograph shows a hyaline veil or collar. These shells were found in a sample from Crailoo.

Pseudodifflugia klarae
Pseudodifflugia klarae
Notice the double nucleolus
Pseudodifflugia klarae
Pseudodifflugia klarae
Shell 14 µm long
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