400X
Eyepiece magnification: 10X
Field Number: 18mm
Water from a small stream full of leaf litter.
400X
Eyepiece magnification: 10X
Field Number: 18mm
Water from a small stream full of leaf litter.
Possible F. krammeri. appears to have gap at apices, fits autecology: https://diatoms.org/species/frustulia_krammeri
looks like paludosa or mydohaimasiae
marginal spines every two to three costae
radial areolae
large valves
trapezoidal to hexagonal costae