Arcella mitrata cf pyriformis? Deflandre

Specimen # 25331:
Diameter shell: 125.8 µm
Diameter aperture: 40.5 µm
Height shell: 135.6 µm
Bucal depth: 13.2 µm

Specimen # 25316:
Diameter shell: 121.4 µm
Diameter aperture: 42.7 µm
Height shell: 134.3 µm
Bucal depth: 9.6 µm

This two specimens seem to be Arcella mitrata var pyriformis but they are not tall enough. It seems to be an intermediate form between A. mitrata and A. mitrata var pyriformis.

Arcella cf. mitrata var pyriformis? Deflandre

Specimen #25220-221:
Diameter shell: 112.5 µm
Diameter aperture: 40.5 µm
Height shell: 147.1 µm
Bucal depth: 15.4 µm

This specimen looks like Arcella mitrata var pyriformis Deflandre 1928. Unfortunately, I do not have a picture showing the apical view.