I found this one in a sample from Crailoo, the Netherlands. It came up in a wet mount kept in a moist chamber for some days. There were only two specimen, attached to the underside of the coverslip. It is remarkable because of two things:
1 It has very few granules along its filopodia;
2 There is a dotted line around the cell body.
Metaheleopera
M. ovalistoma – after Bartos, 1963 Metaheleopera Bartos, 1963 Diagnosis: Shell clearly narrowing towards the pseudostome, which can be seen even more clearly on the narrower sides