Arcella mitrata? Leidy

Specimen # 24973-974:

Diameter shell: 113.2 µm

Diameter aperture: 32.5 µm

Height shell: 115.8 µm

Bucal depth: 13.1 µm

Specimen #24975:
Diameter shell: 115.7 µm
Diameter aperture: 37.4 µm
Height shell: 127.2 µm
Bucal depth: 13.4 µm

Specimen #24971:
Diameter shell: 114.2 µm
Diameter aperture: 33.4 µm
Height shell: 117.4 µm
Bucal depth: 13.7 µm