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.
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