
C. grandis, Japan, 2024
Centropyxis grandis (Deflandre, 1929)
Basionym: Centropyxis aculeata var. grandis Deflandre, 1929
Diagnosis: Shell neatly circular, with a relatively small rounded aperture. Broad ventral area around the aperture is smooth, without embedded particles.
Dimensions: Deflandre (1929): 150-180 µm (without spines). My measurements: 121-139 µm (measured without spines, n=6)
Habitat: Freshwater.

Centropyxis aculeata, 88 µm and 89 µm

Centropyxis grandis, after Deflandre, 1929